I am trying to setup a simple example on limit load and shakedown analysis using Abaqus UMAT program. Would like to verify examples on plane stress, plane strain or axisymmetric cylinder problems from Ponter, Chen et.al. papers to check the proper working of UMAT.
1) What load steps to use in Abaqus, Static-General nonlinear or viscous?
2) How do I vary the mechanical and thermal (varying) loads?
3) How do I check the convergence?
4) Are there any simple problems such as 2-bar or 3-bar examples and the Abaqus input available to check the Linear Matching Method procedure?
Thank you
You need a LMM plug-in to run these analysis. The LMM is now only released to our research partners.
You may find relevant information from www.thelmm.co.uk
Prof. Chen:
As I do not have access to the plug-in which appears to have automated the entire LMM process, I would like to set up a UMAT and perform limit load and shakedown for some example problems and generate a few points on the Bree diagram. Not sure how this was done prior to the Abaqus plug-in was developed but at least want to generate one data point on the shakedown diagram at a time for a few cases. Please let me know how exactly to setup the analysis load steps in Abaqus and what checks I should have in UMAT? Thank you
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