User Area > Advice
Stress Output Using Thick Shells with Plasticity
The plasticity formulation
used for the thick shell element suit is based on a
"plane stress" assumption (i.e. sz=0),
giving the usual stress output of
sx sy
sxy syz szx
Because of this assumption, the element
is not able to use the classical plasticity algorithms available for
three dimensional solid elements (the missing stress,
sz being the main problem).
The plasticity formulation used for these elements, therefore, only
uses the stress terms
sx sy
sxy
and ignores the transverse
shear terms, assuming them to remain elastic (a reasonable
assumption in the general case).
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