Having doubts in maximum principal stress in simple tension test by using APDL.

- April 3, 2023 at 4:12 am
  
  Edwin Joseph
  Subscriber
  
  Hi,
  I have tried to carry out the simple tension test for the strctural steel and to plot the stress strain graph for the user defined APDL stress values in tension and compression. the below image are the loaded values of the stress values in APDL.
  
  the solver havent generated the maximum principal stress. As in this Maximum principal stress sigma_11, 22, 33 are aligned in the same coordinates it must have same values of normal stress. have doubt why result havent generated.
- April 3, 2023 at 4:37 am
  
  Edwin Joseph
  Subscriber
  
  In connection to the previous post the material data which is loaded in the APDL commands are ressembles like a brittle material. the material data resemblies cast iron. for brittle material we wont consider voin-misses stress instead of that we have consider max.principal stress theory. in this case i couldnt find the maximum principal stress.