TY - JOUR
T1 - Utilizing a novel lattice orientation based stress characterization method to study stress fields of shear bands
AU - Pagan, Darren C.
AU - Beaudoin, Armand J.
N1 - Funding Information:
DCP is supported by the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation and the National Institutes of Health, National Institute of General Medical Sciences under NSF Award No. DMR-1332208. AJB is supported by the Office of Naval Research In-Sitμ program (Contract N00014-16-1-3126). We would like to thank Professor Amit Acharya for helpful discussions of this work.
Funding Information:
DCP is supported by the Cornell High Energy Synchrotron Source (CHESS) which is supported by the National Science Foundation and the National Institutes of Health , National Institute of General Medical Sciences under NSF Award No. DMR-1332208 . AJB is supported by the Office of Naval Research In-Sit μ program (Contract N00014-16-1-3126 ). We would like to thank Professor Amit Acharya for helpful discussions of this work.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/7
Y1 - 2019/7
N2 - A new framework for evaluating stress fields from distributions of crystallographic orientation is presented. The framework employs the kinematics of crystal plasticity and field dislocation mechanics to connect measured lattice orientation, crystallographic slip, and geometrically necessary dislocations to recover the elastic deformation field present, and subsequently determine the stress using a finite-element scheme. As a demonstration of the framework's utility, stress fields generated by the formation of shear bands in a copper single crystal are studied, including how these bands’ stress fields drive secondary slip. The results indicate that small amounts of secondary slip shielded stresses produced by the shear bands and that the bands were oriented in a low-energy configuration, stabilizing their structure.
AB - A new framework for evaluating stress fields from distributions of crystallographic orientation is presented. The framework employs the kinematics of crystal plasticity and field dislocation mechanics to connect measured lattice orientation, crystallographic slip, and geometrically necessary dislocations to recover the elastic deformation field present, and subsequently determine the stress using a finite-element scheme. As a demonstration of the framework's utility, stress fields generated by the formation of shear bands in a copper single crystal are studied, including how these bands’ stress fields drive secondary slip. The results indicate that small amounts of secondary slip shielded stresses produced by the shear bands and that the bands were oriented in a low-energy configuration, stabilizing their structure.
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U2 - 10.1016/j.jmps.2019.04.003
DO - 10.1016/j.jmps.2019.04.003
M3 - Article
AN - SCOPUS:85063934408
SN - 0022-5096
VL - 128
SP - 105
EP - 116
JO - Journal of the Mechanics and Physics of Solids
JF - Journal of the Mechanics and Physics of Solids
ER -