Dear Community,
I am trying to implement an UEL for implicit dynamics analysis. After applying time-stepping scheme (implicit backward Euler), the formula of RHS vector requires the value of solution variables at time t. However, in UEL only an estimate of solution variables and their...
Dear community,
I need to implement strain rate effect through VUMAT and I need to calculate strain rate in my VUMAT code. I read the VUMAT documentation and found two time-related variables: stepTime and dt. It seems that both variables can be used for the aim. T think that the strain rate can...
Does anyone know whether we can use MAT_059 with TSHELL element in ls-dyna? I saw an introduction slide saying that MAT_059 is compatible with shell,tshell and solid elements. However, I have tried both two types of MAT_059 with TSHELL element and the solver always told me that the section type...
Dear Community,
I am working on modeling delamination between plies of composite laminate and now I need to create zero-thickness cohesive layer between plies. How can I do it? Currently I am using finite-thickness cohesive layer but the result has a small discrepancy from that of literature...
Dear Community, when I use Abaqus UMAT and VUMAT, I notice that in the official doc the calculation is performed at each MATERIAL POINT. I am wondering what MATERIAL POINT is. Is it just identical to integration point? Thx!
Dear Community,
Hi! I am trying to verify Abaqus VUMAT with simple examples so I wrote a VUMAT for orthotropic material and compare the result with Abaqus built-in material model (Elastic -> Engineering constants). The material constants are given in 1.png and 2.png. All other settings from...
