@article{subramanian_guddati_kim_2013, title={A viscoplastic model for rate-dependent hardening for asphalt concrete in compression}, volume={59}, ISSN={["1872-7743"]}, DOI={10.1016/j.mechmat.2012.10.003}, abstractNote={This paper presents a new type of viscoplastic model based on viscoelastic convolution integrals for explaining the behavior of asphalt concrete in compression under repeated loading. Triaxial compression cyclic tests carried out for long rest periods, with different loading times and two different pulse shapes, square and haversine, were used in developing and validating the model. These tests demonstrate that the evolution of permanent deformation depends on load history. This history-dependent behavior is not captured accurately by some of the existing Perzyna-type viscoplastic models in which permanent deformation evolution depends on the current values of stress and viscoplastic strain. Therefore, in this study, viscoelastic-like convolution integrals were used in the model to capture the effect of history. The proposed model is applicable to compressive creep and recovery experiments at 54 °C with (1) several hundreds of cycles of loading including the secondary creep region, (2) haversine loading shapes at three different peak deviatoric stress levels, 620 kPa, 827 kPa, and 1034 kPa, and square loading shapes at 827 kPa peak deviatoric stress, and (3) long rest periods that allow complete viscoelastic recovery.}, journal={MECHANICS OF MATERIALS}, author={Subramanian, Vijay and Guddati, Murthy N. and Kim, Y. Richard}, year={2013}, month={Apr}, pages={142–159} }
 @article{kim_baek_underwood_subramanian_guddati_lee_2008, title={Application of viscoelastic continuum damage model based finite element analysis to predict the fatigue performance of asphalt pavements}, volume={12}, ISSN={1226-7988 1976-3808}, url={http://dx.doi.org/10.1007/s12205-008-0109-x}, DOI={10.1007/s12205-008-0109-x}, number={2}, journal={KSCE Journal of Civil Engineering}, publisher={Springer Science and Business Media LLC}, author={Kim, Y. Richard and Baek, Cheolmin and Underwood, B. Shane and Subramanian, Vijay and Guddati, Murthy N. and Lee, Kwangho}, year={2008}, month={Mar}, pages={109–120} }