Reduction of EPPL (vM plastic strain?)

- September 8, 2024 at 8:06 am
  
  6714cfm6714
  Subscriber
  
  If you have a solution, please help me.
  Model condition
  ・Static nonlinear analysis.
  ・The simple cube is being tensile and compression.
  
  Problem
  ・I evaluated EPPL EQV (vM plastic strain), but that reduced while unloading and compression.
  ・But plastic strain would be accumlation value.
- September 8, 2024 at 2:29 pm
  
  peteroznewman
  Subscriber
  
  As the plastic strain increments, it is accumulated in NL:EPEQ. This is the accumulated equivalent plastic strain, which is a scalar measure and always monotonically increasing. If you take the difference between two substeps, you are getting the incremental equivalent plastic strain.