Help: calculate elasticity tensor for hyperelastic material with plane stress configuration
Dear all,
I am confused with the calculation of elasticity tensor of hyperelastic material in plane stress configuration. Your helps are very much appreciated. Below is my question:
Incompressible strain energy function is expressed as, saying, U=***+p(J-1).
Therefore, the second piola-kirchhoff stress is: S=***+pC^-1 (the Lagrange muliplier p is treated as an arbitrary constant here, right?).
Using the plane stress condition, S<33>=0 so that p is updated as a function of deformation.