ANSYS APDL question: I am trying to model a composite under tension test with material properties as follows- Material 1(Upper layer): E-10 MPa, v=0.49.and has creep and plastic properties.
Material 2(Middle layer): E- 280GPa, v=0.21,
Material 3(low layer): E=10GPa, v=0.45.
I am assuming perfect bonding between these materials. If I stretch it terms of displacement, no matter what the value is, I do not get results more than around 5% strain and the upper layer does not really have any deformation, I'm guessing this is because of very high level of elastic mismatch, is there any way to minimize this?
I was also looking for resources regarding how to simulate necking in this three material system.
Your help would be highly appreciated, Thank you!
Dear Yeasir Arafat, my suggestion is:
Step 1: let Material 1 E=10 GPa, and check the results of the solution
Step 2: if step 1 is OK, start to decrease Material 1 E gradually and each time check the results.
I think you will discover the problem.
Best wishes...
Hi Claudio,
I'm using the following
1. Plane strain conditions with PLANE 183 elements.
2. Common nodes for bonded contact
3. For stretching, pulling on one side while keeping the other fixed (all DOF zero on the fixed side, putting displacement on lines)
I'm not quite sure about the stress transfer issue, is this because of the stiff layer in between and the huge elastic mismatch? Can the mismatch be reduced by changing geometry of the model (increasing thickness)?
Also, any insight or documentation for necking initiation in APDL would be very helpful..
thank you!
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