Anisotropic stiffness matrix in Engineering Data

- October 4, 2017 at 12:20 pm
  
  pgl
  Ansys Employee
  
  The stiffness matrix defined in Engineering Data should be a positive definite one. Being positive definite means that the following expression must equal a positive number ! 1.0 - NUXY2EX/EY - NUYZ2EY/EZ - NUXZ*2EX/EZ - 2.0NUXYNUYZNUXZEX/EZ
- October 4, 2017 at 2:39 pm
  
  nselvara
  Ansys Employee
  
  Why the anisotropic stiffness matrix in Engineering Data is yellow?