liebealt's blog

Hi all,

The question is that is there any document about the timing of calling a user subroutine in ABAUQS? (i.e., UEXTERNALDB being called at the start/end of the analysis or current incerment, UMAT being called at the start of the increment and iteration). I had a document specifying these details for almost every subroutine by attaching them on the flow chart of ABAQUS analysis, but unfortunately I lost it. I wonder if someone happens to have this document or something like this and is willing to share it. Any help would be appreciated.

liebealt

Hi all,

The question is how can the stress at a point other than integration points be evaluated in VUMAT/UMAT. Interpolation may be a general method. However, to me, it seems not so easy to be implemented, for I have no idea of the way to retrieve the necessary information of all integration points (their indexes, positions etc.) belongint to a identical FE. Any help would be appreciated.