The four state variables
(S,
T,
D, and
E)
can be rearranged to give an additional 3 forms for a piezoelectric constitutive equation.
Instead of the coupling matrix
d, they contain the coupling matrices
e,
g, or
q.
It is possible to transform piezo constitutive data in one form to another form.
Why are these transformations important? A leading motivation is that
vendors typically publish material data for
d and
g, whereas certain finite element
codes require piezo data entered as
e.
To view the 4 piezoelectric constitutive equations and their mutual transformations,
visit the Constitutive Transform page.
