Diagram

1.  A constitutive model relates stress, true strain, strain rate and temperature.
 Typically, the temperature and strain or strain rate is kept constant.
 Models with increasing degree of complexity are as below. Sometimes these models are to
simplify the analysis.
What kind of constitutive models (of deformation) can we consider?
A. Linear elastic. (Close to the behaviour of brittle materials).
B. Non-linear elastic.
C. Elastic-plastic with constant flow stress.
D. Elastic-plastic with strain hardening (linear flow behaviour)
E. Elastic-plastic with strain hardening (non-linear flow)
A B
C
D
E
Other terms in this context:  Anelastic,  Viscoelastic,  Hyperelastic