Works (75)

Updated: April 20th, 2024 05:01

2024 journal article

Modeling damage caused by combined thermal and traffic loading using viscoelastic continuum damage theory

CONSTRUCTION AND BUILDING MATERIALS, 418.

By: Z. Zeng n, Y. Kim n, B. Underwood n & M. Guddati n

author keywords: Pavement; Asphalt mixture; Thermal cracking; Fatigue cracking; Viscoelastic continuum damage model; VECD; S-VECD
Sources: Web Of Science, ORCID, NC State University Libraries
Added: February 15, 2024

2024 journal article

Solving inverse scattering problems via reduced-order model embedding procedures

INVERSE PROBLEMS, 40(2).

By: J. Zimmerling*, V. Druskin*, M. Guddati n, E. Cherkaev* & R. Remis*

author keywords: inverse scattering; reduced-order models; embedding; optimal grids
TL;DR: This work introduces a new embedding technique, which it is called Krein embedding, since it is inspired by Krein's seminal work on vibrations of a string, and shows how it is connected to classical optimal grid embedding and that convergence results for optimal grids can be extended to this novel embedding approach. (via Semantic Scholar)
Source: Web Of Science
Added: January 8, 2024

2023 journal article

Asphalt mixture fatigue damage and failure predictions using the simplified viscoelastic continuum damage (S-VECD) model

INTERNATIONAL JOURNAL OF FATIGUE, 174.

By: Z. Zeng n, Y. Kim n, B. Underwood n & M. Guddati n

author keywords: Asphalt mixture; Fatigue life; Viscoelastic continuum damage (VECD) model; Stress; Strain
Sources: Web Of Science, ORCID
Added: June 1, 2023

2023 journal article

Correlation-based full-waveform shear wave elastography

PHYSICS IN MEDICINE AND BIOLOGY, 68(11).

By: A. Elmeliegy n & M. Guddati n

Contributors: A. Elmeliegy n & M. Guddati n

author keywords: wave scattering; inverse modeling; PDE constrained optimization; elastography; ultrasound
MeSH headings : Elasticity Imaging Techniques / methods; Phantoms, Imaging; Ultrasonography; Elasticity; Physics
TL;DR: A methodology of inverting for 2D elasticity maps from measurements on a single line is presented that has better convexity and convergence properties compared to the traditional least-squares functional, and is less sensitive to initial guess, robust against noisy measurements and other errors that are common in ultrasound elastography. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: May 20, 2023

2023 journal article

Full waveform inversion for arterial viscoelasticity

PHYSICS IN MEDICINE AND BIOLOGY, 68(5).

By: T. Roy n & M. Guddati n

author keywords: arterial stiffness; shear wave elastography; guided waves; semi-analytical finite element method; cross-correlation
MeSH headings : Viscosity; Phantoms, Imaging; Elasticity; Arteries / diagnostic imaging; Elasticity Imaging Techniques / methods
TL;DR: This paper develops a full waveform inversion (FWI) methodology, based on directly matching predicted and measured wall velocity in space and time, to simultaneously estimate both elasticity and viscosity, and concludes that the proposed FWI is effective in estimating arterial viscoelasticity. (via Semantic Scholar)
Source: Web Of Science
Added: March 13, 2023

2023 journal article

Improved least-squares migration through double-sweeping solver

GEOPHYSICS, 88(3), S131–S141.

By: M. Eslaminia*, A. Elmeliegy* & M. Guddati n

Contributors: M. Eslaminia*, A. Elmeliegy* & M. Guddati n

UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Sources: Web Of Science, ORCID
Added: April 9, 2023

2023 article

Improving group velocity based estimates of arterial stiffness

Capron, C., Roy, T., Guddati, M., & Urban, M. W. (2023, March). JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, Vol. 153.

By: C. Capron*, T. Roy*, M. Guddati n & M. Urban*

TL;DR: An interpolation-based method is developed to provide a corrected G estimate using data generated by the SAFE model, which shows severe geometry-dependent bias with the bulk method, which is partially ameliorated with the PWV method and substantially improved with the interpolation approach. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (OpenAlex)
Source: Web Of Science
Added: September 5, 2023

2023 journal article

Orthotropic elastic material inversion through PDE constrained optimization

MECHANICAL SYSTEMS AND SIGNAL PROCESSING, 205.

By: M. Guddati n & T. Walsh*

Source: Web Of Science
Added: December 11, 2023

2023 article

Shear wave elastography: From dispersion matching to full waveform inversion

Guddati, M., Roy, T., Elmeliegy, A. M., & Urban, M. W. (2023, March). JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, Vol. 153.

By: M. Guddati n, T. Roy*, A. Elmeliegy n & M. Urban*

TL;DR: This paper presents inversion approaches ranging from matching dispersion characteristics to matching full waveform responses and provides rationale for choosing the appropriate technique(s) depending on the problem at hand. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: September 5, 2023

2022 journal article

Full wave simulation of arterial response under acoustic radiation force

COMPUTERS IN BIOLOGY AND MEDICINE, 149.

By: T. Roy n & M. Guddati n

author keywords: Arterial stiffness; Guided waves; Semi-analytical finite element method; Shear wave elastography; Viscoelasticity
MeSH headings : Acoustics; Arteries / diagnostic imaging; Arteries / physiology; Elasticity Imaging Techniques / methods; Finite Element Analysis; Humans; Phantoms, Imaging
TL;DR: The computational effort is shown to be several orders of magnitude less than the traditional, fully three-dimensional analysis using finite element methods, leading to a practical yet accurate simulation of arterial response under ARF excitations. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: October 17, 2022

2022 journal article

Full waveform inversion through double-sweeping solver

JOURNAL OF COMPUTATIONAL PHYSICS, 453.

By: M. Eslaminia*, A. Elmeliegy n & M. Guddati n

Contributors: M. Eslaminia*, A. Elmeliegy n & M. Guddati n

author keywords: FWI; Double-sweeping solver; Inverse problems; Helmholtz equation; Preconditioning
Sources: Web Of Science, ORCID
Added: March 2, 2022

2022 journal article

Measurement of wave propagation through a tube using dual transducers for elastography in arteries

PHYSICS IN MEDICINE AND BIOLOGY, 67(22).

By: H. Lee, C. Capron, H. Liu, T. Roy*, M. Guddati*, J. Greenleaf, M. Urban

author keywords: artery; wave propagation; elasticity; acoustic radiation force
MeSH headings : Elasticity Imaging Techniques / methods; Phantoms, Imaging; Transducers; Arteries / diagnostic imaging; Arteries / physiology; Motion
TL;DR: This study provides a more comprehensive understanding of the waves produced in an artery-mimicking tube with ARF application, which will provide opportunities for improving measurement of arterial mechanical properties. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: December 19, 2022

2022 journal article

The influence of acoustic radiation force beam shape and location on wave spectral content for arterial dispersion ultrasound vibrometry

PHYSICS IN MEDICINE AND BIOLOGY, 67(13).

By: M. Capriotti, T. Roy*, N. Hugenberg, H. Harrigan, H. Lee, W. Aquino, M. Guddati*, J. Greenleaf, M. Urban

author keywords: ultrasound; shear wave; artery; waveguide; dispersion
MeSH headings : Acoustics; Elasticity Imaging Techniques / methods; Phantoms, Imaging; Ultrasonography
TL;DR: This investigation is important to understand the spectral content variations in ADUV measurements and to maximize inversion accuracy by tuning the ARF beam settings in clinical applications. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: July 5, 2022

2021 journal article

Characterizing blood clots using acoustic radiation force optical coherence elastography and ultrasound shear wave elastography

PHYSICS IN MEDICINE AND BIOLOGY, 66(3).

By: H. Liu*, M. Abbasi*, Y. Ding*, T. Roy n, M. Capriotti*, Y. Liu*, S. Fitzgerald*, K. Doyle* ...

author keywords: ischemic stroke; blood clots; mechanical thrombectomy (MT); thrombus; optical coherence elastography (OCE); shear wave elastography (SWE); acoustic radiation force (ARF)
MeSH headings : Acoustics; Elasticity Imaging Techniques; Erythrocytes / metabolism; Fibrin / metabolism; Finite Element Analysis; Humans; Thrombosis / diagnostic imaging; Thrombosis / metabolism; Tomography, Optical Coherence
TL;DR: The study demonstrated that the composition of the clots can be characterized by elastographic methods using ARF–OCE and SWE, and OCE demonstrated better ability to discriminate between clots of different RBC compositions, compared to the ultrasound-based approach, especially in clots with low RBC composition. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: February 15, 2021

2021 article

Field Validation of Effective Dispersion Analysis of Reflections, a New Method for Nondestructive Estimation of Pile Depth

Samu, V., & Guddati, M. (2021, April 26). TRANSPORTATION RESEARCH RECORD.

By: V. Samu n & M. Guddati n

UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 23, 2021

2021 journal article

Multimodal guided wave inversion for arterial stiffness: methodology and validation in phantoms

PHYSICS IN MEDICINE AND BIOLOGY, 66(11).

By: T. Roy n, M. Urban*, Y. Xu*, J. Greenleaf* & M. Guddati n

author keywords: elastography; dispersion; inverse problems; finite element; fluid-structure interaction
MeSH headings : Algorithms; Elastic Modulus; Elasticity Imaging Techniques; Phantoms, Imaging; Vascular Stiffness
TL;DR: A new GWI approach is developed and validates by synthesizing various recent observations and algorithms, and the resulting inversion approach is validated using extensive experimental data from rubber tube phantoms, not only for modulus estimation but also to simultaneously estimate modulus and wall thickness. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: June 10, 2021

2021 journal article

Shear wave dispersion analysis of incompressible waveguides

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 149(2), 972–982.

By: T. Roy n & M. Guddati n

TL;DR: A suite of methodologies is presented to compute shear wave dispersion in incompressible waveguides encountered in biomedical imaging, based on semi-analytical finite element methods in the frequency domain with a specific focus on the complexities associated with the incompressibility of the solid media. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: April 12, 2021

2021 journal article

Toward improved accuracy in shear wave elastography of arteries through controlling the arterial response to ultrasound perturbation in-silico and in phantoms

PHYSICS IN MEDICINE AND BIOLOGY, 66(23).

By: N. Hugenberg, T. Roy*, H. Harrigan, M. Capriotti, H. Lee, M. Guddati*, J. Greenleaf, M. Urban, W. Aquino

author keywords: acoustic radiation force; ultrasound vibrometry; waveguide modes; arteries
MeSH headings : Acoustics; Arteries / diagnostic imaging; Elasticity Imaging Techniques / methods; Phantoms, Imaging; Ultrasonography
TL;DR: It is shown that all even-numbered waveguide modes can be eliminated from the arterial response to perturbation, and the efficacy of this approach with in silico tests that show that odd modes are preferentially excited, and a set of ultrasound focal parameters are found that demonstrate the viability of inducing the desired odd-mode response in experiments. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: November 12, 2021

2020 journal article

Nondestructive length estimation of an embedded pile through combined analysis of transverse and longitudinal waves

NDT & E INTERNATIONAL, 110.

By: V. Samu n & M. Guddati n

author keywords: Lateral impact; Attenuation; Unknown foundation; Reflection; Soil
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: March 30, 2020

2019 journal article

Nondestructive Method for Length Estimation of Pile Foundations Through Effective Dispersion Analysis of Reflections

JOURNAL OF NONDESTRUCTIVE EVALUATION, 38(2).

By: V. Samu n & M. Guddati n

author keywords: Unknown foundation; Pile; Length estimation; Flexural waves; Reflection
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: April 15, 2019

2017 journal article

A mechanistic approach to evaluate the potential of the debonding distress in asphalt pavements

INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 18(12), 1098–1110.

By: S. Cho n, A. Karshenas n, A. Tayebali n, M. Guddati n & Y. Kim n

author keywords: Debonding; LVECD; critical stress; shear bond strength; maximum shear ratio (MSR)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Arterial waveguide model for shear wave elastography: implementation and in vitro validation

PHYSICS IN MEDICINE AND BIOLOGY, 62(13), 5473–5494.

By: A. Astaneh n, M. Urban*, W. Aquino*, J. Greenleaf* & M. Guddati n

author keywords: arterial stiffness; guided waves; finite element; viscoelasticity; fluid-structure interaction
MeSH headings : Arteries / diagnostic imaging; Arteries / physiology; Biomechanical Phenomena; Elasticity Imaging Techniques / methods; Finite Element Analysis; Fourier Analysis; Humans; Models, Biological; Phantoms, Imaging; Shear Strength; Vascular Stiffness
TL;DR: Efficient models for the computational simulation of guided wave dispersion in arterial walls are developed based on judiciously combining Fourier transformation and finite element discretization leading to a significant reduction in computational cost while fully capturing complex 3D wave propagation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Dispersion analysis of composite acousto-elastic waveguides

COMPOSITES PART B-ENGINEERING, 130, 200–216.

By: A. Astaneh & M. Guddati*

author keywords: Layered structures; Laminates; Computational modeling; Non-destructive testing
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

A double-sweeping preconditioner for the Helmholtz equation

JOURNAL OF COMPUTATIONAL PHYSICS, 314, 800–823.

By: M. Eslaminia* & M. Guddati n

author keywords: Preconditioner; Helmholtz equation; Iterative solver; Amplitude-preserving propagator
TL;DR: A new preconditioner is developed to increase the efficiency of iterative solution of the Helmholtz equation by split the domain of interest into smaller subdomains and sequentially approximate the forward and backward components of the solution. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

A two-level domain decomposition method with accurate interface conditions for the Helmholtz problem

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 107(1), 74–90.

By: A. Astaneh n & M. Guddati n

author keywords: domain decomposition; non-overlapping; coarse spaces; absorbing interface condition; preconditioning; Helmholtz equation
TL;DR: A new and efficient two‐level, non‐overlapping domain decomposition (DD) method is developed for the Helmholtz equation in the two Lagrange multiplier framework and the widely successful approach based on plane waves is modified to that based on interface waves, hence ensuring linear independence and facilitating the estimation of the optimal size for the coarse problem. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

An algorithm for virtual fabrication of air voids in asphalt concrete

INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 17(3), 225–232.

By: A. Dehghan Banadaki n, M. Guddati n & Y. Kim n

author keywords: asphalt concrete; air void; X-ray tomography; fatigue performance; virtual fabrication
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Efficient computation of dispersion curves for multilayered waveguides and half-spaces

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 300, 27–46.

By: A. Astaneh n & M. Guddati n

author keywords: Guided waves; Surface waves; Layered media; Dispersion curve; Thin layer method; Perfectly matched layers
TL;DR: It is shown that the suggested combination of CFEM and PMDL drastically reduces the number of elements, while requiring minor modifications to the existing finite element codes. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Exponential convergence through linear finite element discretization of stratified subdomains

JOURNAL OF COMPUTATIONAL PHYSICS, 322, 429–447.

By: M. Guddati n, V. Druskin* & A. Astaneh n

author keywords: Optimal grids; Pade approximants; Dirichlet-to-Neumann maps; Rational approximation; Spectral element methods
TL;DR: A novel finite element discretization that results in exponential convergence at pre-selected points and results in significant reduction in the computational cost is devised. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Fourier-finite element analysis of pavements under moving vehicular loading

INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING, 17(7), 602–614.

By: M. Eslaminia n & M. Guddati n

author keywords: Fourier transform; fatigue; pavement performance; continuum damage model; rutting; moving loads; finite element method
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Improved inversion algorithms for near-surface characterization

GEOPHYSICAL JOURNAL INTERNATIONAL, 206(2), 1410–1423.

By: A. Astaneh n & M. Guddati n

author keywords: Inverse theory; Surface waves and free oscillations; Guided waves; Site effects; Wave propagation
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 conference paper

Measured wave dispersion in tubes excited with acoustic radiation force matches theoretical guided wave dispersion

2016 ieee international ultrasonics symposium (ius).

By: M. Urban*, A. Astaneh n, W. Aquino*, J. Greenleaf* & M. Guddati n

TL;DR: Wave propagation in three sets of rubber tubes with different mechanical properties are studied, and their measured and theoretical dispersion curves are compared to improve understanding of wave propagation in arterial walls and improved characterization of their mechanical properties. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Investigating reflective cracking mechanisms in grid-reinforced asphalt specimens use of four-point bending notched beam fatigue tests and digital image correlation

Transportation Research Record, (2507), 29–38.

By: S. Safavizadeh, A. Wargo, M. Guddati & Y. Kim

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Importance of Normal Confinement to Shear Bond Failure of Interface in Multi layer Asphalt Pavements

TRANSPORTATION RESEARCH RECORD, (2456), 170–177.

By: A. Karshenas n, S. Cho n, A. Tayebali n, M. Guddati n & Y. Kim n

Source: Web Of Science
Added: August 6, 2018

2013 journal article

A viscoplastic model for rate-dependent hardening for asphalt concrete in compression

MECHANICS OF MATERIALS, 59, 142–159.

By: V. Subramanian n, M. Guddati & Y. Kim

author keywords: Asphalt concrete; Viscoplasticity; Creep and recovery; Viscoelasticity; Permanent deformation; Compression behavior
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Development of a failure criterion for asphalt mixtures under fatigue loading

ROAD MATERIALS AND PAVEMENT DESIGN, 14, 1–15.

By: J. Zhang n, M. Sabouri n, M. Guddati n & Y. Kim n

author keywords: failure criterion; fatigue; asphalt; pseudo energy; viscoelastic; damage
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 conference paper

Development of a failure criterion for asphalt mixtures under fatigue loading

Asphalt paving technology 2013, vol 82, 82, 1–22.

By: J. Zhang, M. Sabouri, M. Guddati & Y. Kim

Source: NC State University Libraries
Added: August 6, 2018

2013 chapter

Improving the Convergence of Schwarz Methods for Helmholtz Equation

In Lecture Notes in Computational Science and Engineering (pp. 199–206).

By: M. Guddati n & S. Thirunavukkarasu n

TL;DR: This paper focuses on the Optimized Schwarz Method (OSM), which is based on the idea of using approximated half-space Dirichlet-to-Neumann (DtN) maps to improve the convergence of the Schwarz methods. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2012 journal article

A domain decomposition method for concurrent coupling of multiscale models

International Journal for Numerical Methods in Engineering, 92(11), 918–939.

By: S. Thirunavukkarasu n & M. Guddati n

author keywords: atomistic-to-continuum modeling; mutliscale modeling; domain decomposition; Schwarz alternating method
TL;DR: A nonoverlapping Schwarz method is developed with two important features: the use of an efficient approximation of the Dirichlet-to-Neumann map for the interface conditions and the utilization of the inherent scale separation in the solution. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2012 chapter

Accelerated Pavement Performance Modeling Using Layered Viscoelastic Analysis

In 7th RILEM International Conference on Cracking in Pavements (pp. 497–506).

By: M. Eslaminia n, S. Thirunavukkarasu n, M. Guddati n & Y. Kim n

TL;DR: An efficient pavement performance analysis framework is developed by combining the ideas of time-scale separation and Fourier transform-based layered analysis, which can capture the effects of viscoelasticity, temperature, temperature (thermal stresses and changes in visCoelastic properties) and the moving nature of the traffic load. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Source: Crossref
Added: August 28, 2020

2012 journal article

Accurate absorbing boundary conditions for anisotropic elastic media. Part 1: Elliptic anisotropy

JOURNAL OF COMPUTATIONAL PHYSICS, 231(22), 7584–7607.

By: S. Savadatti n & M. Guddati n

author keywords: Wave propagation; Perfectly matched layers; Group velocity; Rational approximation
TL;DR: The approximation properties of PMDL quantified through its reflection matrix is used to derive simple bounds on the PMDL parameters necessary for the accurate absorption of all outgoing anti-plane and in-plane wavemodes - including those with c"p"xc"g"x<0. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Accurate absorbing boundary conditions for anisotropic elastic media. Part 2: Untilted non-elliptic anisotropy

JOURNAL OF COMPUTATIONAL PHYSICS, 231(22), 7608–7625.

By: S. Savadatti n & M. Guddati n

author keywords: Wave propagation; Perfectly matched layers; Group velocity; Rational approximation
TL;DR: The concept of layer groupings along with an unconventional stretching of the finite element mesh is used to guarantee the accuracy of local ABCs designed to treat all propagating wavemodes, even those with opposing phase and group velocities. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Breaking wave-induced response and instability of seabed around caisson breakwater

International Journal for Numerical and Analytical Methods in Geomechanics, 36(3), 362–390.

By: M. Ulker*, M. Rahman n & M. Guddati n

author keywords: breakwater; breaking wave impact loads; dynamic response and stability; coupled flow and deformation; liquefaction; seabed
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science; OpenAlex)
Source: Crossref
Added: November 22, 2020

2012 journal article

Efficient and accurate domain-truncation techniques for seismic soil-structure interaction

EARTHQUAKES AND STRUCTURES, 3(3-4), 563–580.

By: M. Guddati* & S. Savadatti

author keywords: perfectly matched discrete layer; absorbing boundary; soil-structure interaction; seismic domain truncation
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Incremental Model for Prediction of Permanent Deformation of Asphalt Concrete in Compression

TRANSPORTATION RESEARCH RECORD, (2296), 24–35.

By: Y. Choi n, V. Subramanian*, M. Guddati n & Y. Kim n

Source: Web Of Science
Added: August 6, 2018

2012 chapter

Multiscale Micromechanical Lattice Modeling of Cracking in Asphalt Concrete

In 7th RILEM International Conference on Cracking in Pavements (pp. 487–496).

By: A. Banadaki n, M. Guddati n, Y. Kim n & D. Little*

Source: Crossref
Added: August 28, 2020

2012 chapter

Top-Down Cracking Prediction Tool for Hot Mix Asphalt Pavements

In 7th RILEM International Conference on Cracking in Pavements (pp. 465–474).

By: C. Baek*, S. Thirunavukkarasu n, B. Underwood n, M. Guddati n & Y. Kim n

TL;DR: An analysis tool for predicting top-down cracking (TDC) of hot-mix asphalt (HMA) pavements and the results indicate that the interactions among the sub-models and overall trends in terms of pavement behavior were reasonably captured. (via Semantic Scholar)
Source: Crossref
Added: February 24, 2020

2011 journal article

Absorbing boundary conditions for time harmonic wave propagation in discretized domains

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 200(33-36), 2483–2497.

By: S. Thirunavukkarasu & M. Guddati*

author keywords: Artificial boundary conditions; Perfectly matched layers; Discrete absorbing boundary conditions; Wave propagation; Helmholtz equation
TL;DR: It is shown that the discrete system (mesh) can be stretched in a non-trivial way to preserve the discrete impedance at the interface, resulting in a PML-type ABC for discrete media. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

A finite element alternative to infinite elements

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 199(33-36), 2204–2223.

By: S. Savadatti n & M. Guddati n

author keywords: Reduced integration; Optimal mesh; Rational absorbing boundary conditions (ABC); Perfectly matched layer PML; Perfectly matched discrete layer (PMDL); Dirichlet-to-Neumann (DtN) map
TL;DR: This paper develops a finite element mesh that approximates the stiffness of an unbounded domain directly (without approximating the far-field displacement profile first) and uses the results to develop a practical mesh generation methodology that does not require any additional computation on the part of the user. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Absorbing boundary conditions for scalar waves in anisotropic media. Part 1: Time harmonic modeling

JOURNAL OF COMPUTATIONAL PHYSICS, 229(19), 6696–6714.

By: S. Savadatti n & M. Guddati n

author keywords: Wave propagation; Perfectly matched layers; Group velocity; Rational approximation; Accuracy
TL;DR: The accuracy condition presented here is shown to govern both the well-posedness and accuracy aspects of PMDL designed for transient (time-dependent) modeling of scalar waves in anisotropic media. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Absorbing boundary conditions for scalar waves in anisotropic media. Part 2: Time-dependent modeling

JOURNAL OF COMPUTATIONAL PHYSICS, 229(18), 6644–6662.

By: S. Savadatti n & M. Guddati n

author keywords: Wave propagation; Perfectly matched layers; Group velocity; Rational approximation; Well-posedness; Accuracy
TL;DR: It is shown that this bound on layer lengths also ensures well-posedness, and the time discretized form of PMDL is also shown to be theoretically stable and some instability related to finite precision arithmetic is discussed. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Improved calculation method of damage parameter in viscoelastic continuum damage model

International Journal of Pavement Engineering, 11(6), 459–476.

By: B. Underwood n, Y. Kim n & M. Guddati n

author keywords: viscoelastic; continuum damage; asphalt concrete; fatigue; performance prediction
Sources: Web Of Science, Crossref
Added: August 6, 2018

2010 conference paper

The Development and Evaluation of a Virtual Testing Procedure for the Prediction of the Cracking Performance of Hot Mix Asphalt

Pavements and Materials. Presented at the Pavements and Materials: Characterization and Modeling Symposium at EMI Conference 2010.

By: Z. Feng, P. Zhang, M. Guddati* & Y. Kim

Event: Pavements and Materials: Characterization and Modeling Symposium at EMI Conference 2010

Source: Crossref
Added: August 28, 2020

2010 journal article

Wave-induced dynamic response and instability of seabed around caisson breakwater

OCEAN ENGINEERING, 37(17-18), 1522–1545.

By: M. Ulker*, M. Rahman n & M. Guddati n

author keywords: Coupled flow and deformation; Standing wave; Dynamic response; Instability; Seabed; Caisson breakwater; Finite elements
UN Sustainable Development Goal Categories
13. Climate Action (Web of Science)
14. Life Below Water (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Phonon absorbing boundary conditions for molecular dynamics

JOURNAL OF COMPUTATIONAL PHYSICS, 228(21), 8112–8134.

By: M. Guddati n & S. Thirunavukkarasu n

author keywords: Atomistic-to-continuum coupling; Artificial boundary conditions; Absorbing boundary conditions; Perfectly matched layers
TL;DR: It is concluded that MD-PMDL could provide a more effective alternative to existing MD-ABCs, which are extensions of perfectly matched discrete layers that target the absorption of phonons, the high frequency waves, whose propagation properties are completely different from continuous waves. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Application of viscoelastic continuum damage model based finite element analysis to predict the fatigue performance of asphalt pavements

KSCE Journal of Civil Engineering, 12(2), 109–120.

By: Y. Kim n, C. Baek n, B. Underwood n, V. Subramanian n, M. Guddati n & K. Lee*

author keywords: asphalt; viscoelasticity; continuum damage; constitutive model; finite element analysis; fatigue performance
Sources: Web Of Science, Crossref
Added: August 6, 2018

2007 article

Novel finite-element-based subsurface imaging algorithms

Heidari, A. H., & Guddati, M. N. (2007, March). FINITE ELEMENTS IN ANALYSIS AND DESIGN, Vol. 43, pp. 411–422.

By: A. Heidari* & M. Guddati n

author keywords: finite-element method; one-way wave equation; subsurface imaging; wavefield extrapolation; acoustic wave; elastic wave
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2007 journal article

Subsurface imaging via fully coupled elastic wavefield extrapolation

INVERSE PROBLEMS, 23(1), 73–98.

By: M. Guddati n & A. Heidari

Source: Web Of Science
Added: August 6, 2018

2006 journal article

Arbitrarily wide-angle wave equations for complex media

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 195(1-3), 65–93.

By: M. Guddati n

author keywords: one-way wave equations; parabolic equations; paraxial approximations; seismic imaging; synthetic aperture focusing technique (SAFT)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Continued fraction absorbing boundary conditions for convex polygonal domains

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 66(6), 949–977.

By: M. Guddati n & K. Lim*

author keywords: absorbing boundary conditions; non-reflecting boundary conditions; perfectly matched layers; wave propagation; finite elements; finite differences
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Highly accurate absorbing boundary conditions for wide-angle wave equations

GEOPHYSICS, 71(3), S85–S97.

By: A. Heidari n & M. Guddati n

Source: Web Of Science
Added: August 6, 2018

2006 journal article

Padded continued fraction absorbing boundary conditions for dispersive waves

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 195(29-32), 3797–3819.

By: M. Zahid n & M. Guddati n

author keywords: absorbing boundary conditions; perfectly matched layers; unbounded domain modeling; dispersive wave propagation; finite element methods
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Viscoelastic continuum damage finite element modeling of asphalt pavements for fatigue cracking evaluation

KSCE Journal of Civil Engineering, 10(2), 97–104.

By: S. Mun, M. Guddati n & Y. Kim n

Source: Crossref
Added: August 28, 2020

2005 journal article

An efficient algorithm for modelling progressive damage accumulation in disordered materials

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 62(14), 1982–2008.

By: P. Nukala*, S. Simunovic* & M. Guddati n

author keywords: damage evolution; brittle materials; random thresholds model; lattice network; statistical physics
TL;DR: This algorithm using the direct sparse solver is faster than the Fourier accelerated iterative solvers such as the preconditioned conjugate gradient (PCG) solvers, and eliminates the critical slowing down associated with the iterativesolvers that is especially severe close to the percolation critical points. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2005 journal article

Continuum damage finite element modeling of asphalt concrete

KSCE Journal of Civil Engineering, 9(3), 205–211.

By: S. Mun, M. Guddati n & Y. Kim n

Source: Crossref
Added: August 28, 2020

2005 journal article

Dispersion-reducing finite elements for transient acoustics

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, 118(4), 2132–2141.

By: B. Yue n & M. Guddati n

Source: Web Of Science
Added: August 6, 2018

2005 journal article

Experimental Investigation of Anisotropy in Asphalt Concrete

Transportation Research Record: Journal of the Transportation Research Board, 1929(1), 238–247.

By: S. Underwood*, A. Heidari, M. Guddati* & Y. Kim n

Sources: Web Of Science, Crossref
Added: August 6, 2018

2005 journal article

Migration with arbitrarily wide-angle wave equations

GEOPHYSICS, 70(3), S61–S70.

By: M. Guddati n & A. Heidari n

UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

A high resolution computer model for sound propagation in the human thorax based on the Visible Human data set

COMPUTERS IN BIOLOGY AND MEDICINE, 34(2), 177–192.

By: C. Narasimhan*, R. Ward*, K. Kruse*, M. Guddati n & G. Mahinthakumar n

author keywords: sound propagation; human thorax; visible human data set; parallel computing
MeSH headings : Acoustics; Anatomy, Cross-Sectional; Computer Simulation; Humans; Male; Mathematical Computing; Models, Biological; Radiography, Thoracic; Respiratory Sounds / physiology; Thorax / physiology; Tomography, X-Ray Computed
TL;DR: A parallel supercomputer model based on realistic tissue data is developed for sound propagation in the human thorax and the sound propagation behavior is analyzed under various conditions using artificial sound sources to confirm previous studies that show the size of the thorax plays a significant role in the type of sound generated at the chest wall. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2004 article

Fatigue cracking mechanisms in asphalt pavements with viscoelastic continuum damage finite-element program

PAVEMENT DESIGN AND ACCELERATED TESTING 2004, pp. 96–106.

By: S. Mun*, M. Guddati n & Y. Kim n

Source: Web Of Science
Added: August 6, 2018

2004 journal article

Modified integration rules for reducing dispersion error in finite element methods

COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 193(3-5), 275–287.

By: M. Guddati n & B. Yue n

author keywords: wave propagation; numerical dispersion; numerical integration; Helmholtz equation
TL;DR: The method involves a simple shift of the integration points to locations away from conventional Gauss or Gauss–Lobatto integration points, which results in fourth-order accuracy with respect to dispersion error (error in wavelength), as opposed to the second- order accuracy resulting from conventional integration. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2003 journal article

On optimal finite-difference approximation of PML

SIAM JOURNAL ON NUMERICAL ANALYSIS, 41(1), 287–305.

By: S. Asvadurov, V. Druskin, M. Guddati* & L. Knizhnerman

author keywords: absorbing boundary conditions; exponential convergence; finite differences; hyperbolic problems; perfectly matched layers; wave propagation; optimal rational approximations
TL;DR: It is found that the minimal error can be achieved using pure imaginary coordinate stretching, and the PML discretization is algebraically equivalent to the rational approximation of the square root on [0,1] conventionally used for approximate absorbing boundary conditions. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2002 article

Toward a micromechanics-based procedure to characterize fatigue performance of asphalt concrete

BITUMINOUS PAVING MIXTURES 2002, pp. 121–128.

By: M. Guddati n, Z. Feng n & Y. Kim n

Source: Web Of Science
Added: August 6, 2018

2000 conference paper

Comparison of continued fraction absorbing boundary conditions with perfectly matched layers

In D. R. Maniar & J. Tassoulas (Eds.), EM 2000: Fourteenth Engineering Mechanics Conference, Department of Civil Engineering, the University of Texas at Austin, Austin, Texas, U.S.A., May 21-24, 2000. Austin, Tex.: Dept. of Civil Engineering, University of Texas at Austin,

By: M. Guddati

Ed(s): . D. R. Maniar & J. Tassoulas

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Continued-fraction absorbing boundary conditions for the wave equation

JOURNAL OF COMPUTATIONAL ACOUSTICS, 8(1), 139–156.

By: M. Guddati n & J. Tassoulas*

Source: Web Of Science
Added: August 6, 2018

2000 conference paper

Reduced dispersion finite elements for time harmonic wave propagation problems

In D. R. Maniar & J. Tassoulas (Eds.), EM 2000: Fourteenth Engineering Mechanics Conference, Department of Civil Engineering, the University of Texas at Austin, Austin, Texas, U.S.A., May 21-24, 2000. Austin, Tex.: Dept. of Civil Engineering, University of Texas at Austin,

By: M. Guddati

Ed(s): . D. R. Maniar & J. Tassoulas

Source: NC State University Libraries
Added: August 6, 2018

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