Stress/strain gradient plasticity model for size effects in heterogeneous nano-microstructures

H Lyu, M Hamid, A Ruimi, HM Zbib - International Journal of Plasticity, 2017 - Elsevier
Traditionally, modeling the effect of grain size on the mechanical behavior of crystalline
materials is based on assuming an equivalent homogenous microstructure with strength …

Thermal activation of dislocations in large scale obstacle bypass

C Sobie, L Capolungo, DL McDowell… - Journal of the Mechanics …, 2017 - Elsevier
Dislocation dynamics simulations have been used extensively to predict hardening caused
by dislocation-obstacle interactions, including irradiation defect hardening in the athermal …

Modal analysis of dislocation vibration and reaction attempt frequency

C Sobie, L Capolungo, DL McDowell, E Martinez - Acta Materialia, 2017 - Elsevier
Transition state theory is a fundamental approach for temporal coarse-graining. It estimates
the reaction rate for a transition processes by quantifying the activation free energy and …

Molecular dynamics simulations of thermally activated edge dislocation unpinning from voids in -Fe

J Byggmästar, F Granberg, K Nordlund - Physical Review Materials, 2017 - APS
In this study, thermal unpinning of edge dislocations from voids in α-Fe is investigated by
means of molecular dynamics simulations. The activation energy as a function of shear …

Atomic level simulations of interaction between edge dislocations and irradiation induced ellipsoidal voids in alpha-iron

B Zhu, M Huang, Z Li - Nuclear Instruments and Methods in Physics …, 2017 - Elsevier
High concentrations of vacancies tend to be formed inside the metal materials under
irradiation, and then accumulate and cluster together gradually to promote the formation of …