Hi everyone
I have written a VUMAT code for Isotropic -Viscoplasticity material using the finite strain theory and matirx "F"
the code works properly for compression and tension test, however , under shear loading it work just properly if I use only one single element to model the specimen.
when I increase the numebr of elements under simple shear loading the model starts to oscillate until similation aborted.
it seems that elements can not tranfer shear loading among each other, I am usnig C3D8R element, and also I coneverted my Couchy stress to Green naghdi stress
anybody has idea how to solve this problem.
Regards
Kianoosh
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Hi, I am a undergraduate
Hi, I am a undergraduate student and I am trying to test a bulk metallic glass VUMAT with uniaxial compression test. But I only manage to simulate the compression test with Abaqus standard and I don't know how to set up the uniaxial compression test using Abaqus Explicit. Can you tell me how you set up a compression test using setting of Abaqus Explicit?
compression test VUMAT
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Dear
Going
To
perform the compression simulation,, with assumption of a cylindrical sample standing
in Y direction; you can apply velocity profile (if you are doing experiment under
a constant strain rate, it means constant velocity) on the upper surface in Y
direction, and fix the Nodal displacement for bottom surface also in Y
direction. It has been assumed that contact surfaces between the machine head
and your sample are frictionless. This lets your sample be free to deform in
x-z plane, and does not become barrel shape.