74
4 Nonlinear Constitutive Relations
4.6 Summary
This chapter dealt with constitutive equations for both isotropic or orthotropic piezoelectric materials. Piezoelectricity was discussed for the deep insight of piezoelectric
materials, which is followed by fundamental theory of piezoelectricity in threedimensional space. Later, the constitutive equations for plates and shells were constructed, with the transformation law between the fiber coordinates and structural
coordinates. Two typical constitutive equations of MFC materials were developed
for multi-layered MFC structures. Finally, an electroelastic coupled nonlinear constitutive relations was presented for the simulation of structures under strong electric
filed.
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