PPFA (Progressive Ply Failure Analysis Data)

On the Material form, under the Analysis Specific Data section, click the PPFA button. The following window pops up:

• PPFA Data allows to specify the Stiffness Reduction Factors for the respective material type i.e. Isotropic, Orthotropic 2D.
• If the Material type is Isotropic, Orthotropic 2D and Orthotropic 3D, the PPFA Data will have the Stiffness Reduction Factors for E and G in different directions.

  

  Isotropic

  

  Orthotropic 2D

  

  Orthotropic 3D

• Perform PPFA Calculation is the parameter which once the checkbox is checked it will turn on the NLCOMPPLYFAIL in the Nonlinear Solution Processor Parameters. It updates the button with (on).