Single crystal plasticity theories predicting bounded lattice rotation under simple shear deformation

2012 ◽  
Vol 20 (4-6) ◽  
pp. 73-75
Author(s):  
Carsten Broese ◽  
Charalampos Tsakmakis

AbstractUp to now, models for single crystal plasticity predict unbounded lattice rotations under simple shear. Asaro et al. proposed a model that predicts bounded rotations as long as the viscosity parameters are appropriately chosen. In every case, ideal plasticity models imply unbounded lattice rotations. Hence, it leads to the question whether one can develop a single crystal plasticity theory exhibiting hardening effects, which can predict bounded lattice rotations dependent on the choice of the hardening parameters. It is shown that this is possible by assuming latent hardening to apply.

2005 ◽  
Vol 495-497 ◽  
pp. 1043-1048 ◽  
Author(s):  
K.P. Boyle

A new phenomenological latent hardening model is developed for rate-dependent single crystal plasticity. The model quantitatively predicts the latent hardening evolution and latent hardening material dependence for f.c.c. single crystals. Increased overshoot, typically observed in copper alloys as opposed to copper, is rationalized based on the history dependence of latent hardening.


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