Hi,
I am performing a three-point bending test on a composite material using conventional shell elements in order to apply Hashin Criteria and damage evolution with ABAQUS.
However, I am wondering questions regarding the results:
- analytical supports go through the shell plate; does it affect the results ?
- there is no stress on the contact between the indenter and the shell plate; does it normal? The interaction between the reference point and the analytical surface might not be correct ?
Below, there is a brief description of my model.
Thank you very much for any help, I am not familiar with ABAQUS.
Ben,
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Model:
Plate: conventional shell with composite layup (6 layers)
Support & indenter: analytical rigid elements, 1/2 cylinder, constrain rigid body with reference point
Material: CFRP with Hashin value, damage evolution and damage stabilisation (0.01 each)
Step: Toggle Ngleom
Interaction: surface to surface
BCs: encastre for the reference points of the supports and displacement -10mm for the reference point of the indenter
Are you sure the elements are still bearing any load? maybe they failed and they are not carrying load.... check it in the output...
Check your definition of contact, seems like you have some penetration for the supports going through the plates, I am not familiar with contact in Abaqus, but in Ansys you can control the penetration of the surfaces. Penetration will affect the results when the magnitude is not sufficiently small.Something to think about.
be sure of your Contact definition. It seems to be not well definied. Some Tipps:
-Rigid should be Master and Plate should be Slave.
-be sure also to extend the Contact surface. you have large displacment.
-Slave surface should be finer than Master surface.
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