The isotropic model implies that, if the yield strength in tension and compression are initially the same, i.e. the yield surface is symmetric about the stress axes, they remain equal as the yield surface develops with plastic strain. In order to model the Bauschinger effect, and similar responses, where a hardening in tension will lead to a softening in a subsequent compression, one can use the kinematic hardening
rule. This is where the yield surface remains the same shape and size but merely translates in stress space.
for more detail pl. go through following paper:
Han-ChinWu .Anisotropic plasticity for sheet metals using the concept of combined isotropic-kinematic hardening. International Journal of Plasticity,Volume 18, Issue 12, December 2002, Pages 1661-1682
The isotropic model implies that, if the yield strength in tension and compression are initially the same, i.e. the yield surface is symmetric about the stress axes, they remain equal as the yield surface develops with plastic strain. In order to model the Bauschinger effect, and similar responses, where a hardening in tension will lead to a softening in a subsequent compression, one can use the kinematic hardening
rule. This is where the yield surface remains the same shape and size but merely translates in stress space.
for more detail pl. go through following paper:
Han-ChinWu .Anisotropic plasticity for sheet metals using the concept of combined isotropic-kinematic hardening. International Journal of Plasticity,Volume 18, Issue 12, December 2002, Pages 1661-1682
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