@article{baucom_zikry_qiu_2004, title={Dynamic and quasi-static failure evolution of 3D woven cellular composite systems}, volume={23}, ISSN={["0731-6844"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-1642443479&partnerID=MN8TOARS}, DOI={10.1177/0731684404032076}, abstractNote={ The effects of porosity on the impact response and perforation resistance of 3D woven carbon-fiber reinforced epoxy panels under impact by projectiles and under quasi-static three-point bending were experimentally investigated. The 3D cellular composite systems were fabricated by a new method, where porosity can be controlled. The porous samples absorbed a greater amount of specific energy than the nonporous samples. This may be due to the deflection of matrix cracks by the pores and the greater flexibility of the fibers to absorb energy through tensile straining. The quasi-static experiments also indicate that porosity may exhibit strength comparable to nonporous systems. }, number={5}, journal={JOURNAL OF REINFORCED PLASTICS AND COMPOSITES}, author={Baucom, JN and Zikry, MA and Qiu, Y}, year={2004}, pages={471–481} } @article{baucom_zikry_2003, title={Evolution of failure mechanisms in 2D and 3D woven composite systems under quasi-static perforation}, volume={37}, DOI={10.1177/002199803035178}, number={18}, journal={Journal of Composite Materials}, author={Baucom, J. N. and Zikry, Mohammed}, year={2003}, pages={1651–1674} } @article{baucom_zikry_2003, title={Evolution of failure mechanisms in 2D and 3D woven composite systems under quasi-static perforation}, volume={37}, ISSN={["1530-793X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0042793491&partnerID=MN8TOARS}, DOI={10.1177/0021998303035178}, abstractNote={ The effects of reinforcement geometry, in 2D and 3D woven fabric-reinforced composites, on the progression of damage and perforation failure at quasi-static loading rates (10-80 mm/s) are investigated. The broad classes of glass-fiber-reinforced systems that were examined include 2D plain-woven laminates, 3D orthogonally woven monolithic systems, and 3D orthogonally woven laminates. The experimental results indicate that the 3D laminates consistently had greater damage tolerance than the 2D laminates and the 3D monolithic composites. The enhanced damage tolerance of the 3D systems is due to unique energy absorption mechanisms, which involve the crimped portion of z-tows. }, number={18}, journal={JOURNAL OF COMPOSITE MATERIALS}, author={Baucom, JN and Zikry, MA}, year={2003}, pages={1651–1674} } @article{zikry_pothier_baucom_2000, title={High strain-rate shear-strain localization in f.c.c. crystalline materials: a perturbation analysis}, volume={37}, ISSN={["0020-7683"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0345852386&partnerID=MN8TOARS}, DOI={10.1016/S0020-7683(99)00266-8}, abstractNote={Abstract A new perturbation formulation has been developed that is based on a rate-dependent crystalline plasticity constitutive formulation to investigate planar high strain-rate instabilities and shear-strain localization in face-centered cubic (f.c.c.) crystalline materials. This new formulation can account for strain-rate sensitivity values that range from rate-independent to highly rate-dependent values. Hence, accurate and detailed predictions of material instabilities and shear-strain localization can be obtained for high strain-rate deformations of crystalline materials that are rate-sensitive, such as f.c.c. materials. Critical instability parameters are obtained for deformation modes that account for the effects of strain-rate history, inertia, strain-hardening, wave number, and thermal and geometrical softening for applied strain-rates that range from 100 to 5000 s−1. Post-instability behavior and localization modes are monitored by tracking the rate of growth of stability parameters beyond the initial instability point. Results from these perturbation analyses are in good agreement with rate-independent limiting cases and high strain-rate experimental observations. The present study underscores the importance of characterizing material instabilities and shear-strain localization in terms of the competing softening and hardening mechanisms of the lattice structure.}, number={43}, journal={INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES}, author={Zikry, MA and Pothier, MR and Baucom, JN}, year={2000}, month={Oct}, pages={6177–6202} } @article{baucom_zikry_1999, title={Perturbation analysis of high strain-rate shear localization in BCC crystalline materials}, volume={137}, ISSN={["0001-5970"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-0033316049&partnerID=MN8TOARS}, DOI={10.1007/BF01313148}, number={1-2}, journal={ACTA MECHANICA}, author={Baucom, JN and Zikry, MA}, year={1999}, pages={109–129} }