hadi's blog

Hello everyone,

I have a basic question in ABAQUS. For developing a user element in ABAQUS, the strain-displacement tensor, or the so-called B-matrix, needs to be calculated in the UEL subroutine. Applying the B-matrix on the displacement vector gives rise to the strain vector. However, we know that there are more than one strain measure for corresponding, or in other words, different conjugate stress measures.

 What is here not clear for me is what type of strain tensor is calculated by applying B on the displacement vector: (eps=B.d) what is eps here?

Hi,



I have written a user material for Abaqus to simulate the behavior of trabecular bone in large strain compression. The model undergoes elastic and plastic deformation. In the plastic regime, hardening and damage are growing depending on cumulated plastic strain.

Dear iMechanica users,

If you are concerned with user subroutines in ABAQUS, the link below may be helpful:

http://openpdf.com/ebook/umat-abaqus-example-pdf.html

Best, Hadi

Dear iMechanica users,

I would like to write a UEL for 2 or 3D element types used in large deformation, but, I really have little experience in it. Is there any UEL example apart from the simple 1D example in Abaqus manual and the complicated one written by Eugenio (XFEM)?

Thanks,

Hadi

Dear all,

I intend to read the element sets which I have in my Abaqus input file from the user material code (UMAT) and check to which elset the current element, which is characterized by "NOEL" in the UMAT, belongs.

Best,

Hadi

Dear friends,