@article{dongare_rajendran_lamattina_zikry_brenner_2010, title={Tension–compression asymmetry in nanocrystalline Cu: High strain rate vs. quasi-static deformation}, volume={49}, ISSN={0927-0256}, url={http://dx.doi.org/10.1016/j.commatsci.2010.05.004}, DOI={10.1016/j.commatsci.2010.05.004}, abstractNote={Large-scale molecular dynamics (MD) simulations are used to understand the yield behavior of nanocrystalline Ni and Cu with grain sizes ⩽10 nm at high strain rates. The calculated flow stress values at a strain rate of 109 s−1 suggest an asymmetry in the strength values in tension and compression with the nanocrystalline metal being stronger in compression than in tension. This tension–compression strength asymmetry is observed to decrease with a decrease in grain size of the nanocrystalline metal up to a grain size of 4 nm, after which, a further decrease in grain size results in an increase in the strength asymmetry. The effect of strain rate on the yield behavior of nanocrystalline metals as obtained from MD simulations is discussed and compared with that reported in the literature obtained by molecular statics simulations for quasi-static loading conditions.}, number={2}, journal={Computational Materials Science}, publisher={Elsevier BV}, author={Dongare, Avinash M. and Rajendran, Arunachalam M. and LaMattina, Bruce and Zikry, Mohammed A. and Brenner, Donald W.}, year={2010}, month={Aug}, pages={260–265} }
 @article{rezvanian_zikry_rajendran_2008, title={Microstructural modeling in f.c.c. crystalline materials in a unified dislocation-density framework}, volume={494}, ISSN={["0921-5093"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-49849087562&partnerID=MN8TOARS}, DOI={10.1016/j.msea.2007.10.091}, abstractNote={A unified physically based microstructural representation of f.c.c. crystalline materials, has been developed such that evolving microstructural behavior at different physical scales can be accurately predicted. This microstructural framework is based on coupling a multiple-slip crystal plasticity formulation to three distinct dislocation densities, which pertain to statistically stored dislocations, geometrically necessary dislocations, and grain boundary dislocations. This interrelated dislocation-density formulation is then used with specialized finite-element modeling techniques to predict the evolving heterogeneous microstructure and the localized phenomena that can contribute to failure initiation as a function of inelastic deformation.}, number={1-2}, journal={MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING}, author={Rezvanian, O. and Zikry, M. A. and Rajendran, A. M.}, year={2008}, month={Oct}, pages={80–85} }