How to calculate bulk modulus K of MAT 77H

- May 1, 2022 at 11:32 pm
  
  longt8
  Subscriber
  
  Hello,
  I am using MAT 77H now and I am trying to figure out the equation to calculate the bulk modulus K of volumetric strain energy term in Fig.3.
  
  From Fig1, In the MAT 77H, it seems that the system determines bulk modulus K in Fig.3 based on the NV(Poisson ratio) and the second row parameters:
- May 2, 2022 at 11:06 pm
  
  Andreas Koutras
  Ansys Employee
  
  For the hyperelastic material MAT_077H the bulk modulus is calculated as
  bulk=(4./3.)*(c10+c01)*(1.+pr)/(1.-2.*pr)
  and the pressure is
  p=bulk*(1-J)