Bi-Linear material model & resulting stresses?
Bi-Linear material model & resulting stresses?
(OP)
I have a part setup with a bilinear material model. Yield and ultimate are 85 ksi and tangent modulus is zero. I run my analysis on a simple part and I was surprised to see stresses of 95 ksi. How can there be stresses of 95 ksi when I have a material model that should limit the stress to 85 ksi? Both principal and equivalent stress were greater than 85 ksi.





RE: Bi-Linear material model & resulting stresses?
RE: Bi-Linear material model & resulting stresses?
RE: Bi-Linear material model & resulting stresses?
2. Have you done a mesh sensitivity study?
3. Have you plotted the stress-strain history at the location to see what's happening i.e. to check that your input stress-strain data matches your response?
4. Are all of the components the same material i.e. do they share the same mechanical properties? Is the point where you stresses are higher at a material boundary?
5. Which version of ANSYS are you using? Workbench? ANSYS? Version number?
6. What type of elements are you using? What is the ANSYS designation name of these elements?