I am part of a group that is attempting to model the energy dissipation from a crack. In order to do that, we need to track the energy throughout failure. It is our understanding that the way to do this is to model the failure without element deletion, but we having little experience with ABAQUS, we cannot figure out how to turn element deletion off. Help?
Hi, everyone!
I will employ the meshfree method in order to analyze the composite model including the spherical filler and matrix.
However, if the background cells are regular reluctantly, there will be background cells where two types of materials coexist.
In this case, I don't know how to calculate the integral form, K=int_V B'CB dV, numerically.
Hey everyone,
I'm very new on Abaqus, and what I'm trying to do is to assign to a model a changing E modulo as a linear function of Z coordinate ( E(Z)=-33936.651*Z+25e06 ).
I tried to gather some knowledge over the web on how to do so, and I found out that It can be done by writing a USDFLD subroutine, I managed to pick of some exapmles the following code:
SUBROUTINE USDFLD(FIELD,STATEV,PNEWDT,DIRECT,T,CELENT,
1 TIME,DTIME,CMNAME,ORNAME,NFIELD,NSTATV,NOEL,NPT,LAYER,
Hi all,
I'm using Code-Aster (FE solver) and I need to implement a UMAT subrouting to model a non-linear viscoelastic model in it.
The model is combination of viscoelasticity+ Ogden hyperleastic model. I was thinking of 2 approaches:
1. I wonder do you know where I can find such a subroutine?
2. I've seen linear viscoelastic subroutine and maybe I can find another subroutine for hyperlelastic part, I wonder how can I combine this two models to a non-linear viscoelastic model?
I really appreciate your help
BME
Hello,
I'd like to know how the computation time depends on the element number in a model (dynamic explicit analysis in Nastran). When I work with a simple model which has a rather coarse mesh the function is linear, so 10 steps with the increment 0.001 is equivalent to 100 steps with the increment 0.0001. But I don't know how this dependency will evaluate if I build a much more complex model. Maybe it will be exponential?
Thank you
As we know, after simulation we can get the coordinate of {111} plane for fcc metal from SDVs of abaqus odb file. It is easy to plot (111) pole figure by compiling Matlab programming. But what if I wanna polt (100)pole figure?
Hi all,
I am simulating torsion tests (after being successful with tension and compression tests). For tension and compression, I got a good comparsion with experimental and behaviour in tension is same as in compression (of course leaving the necking part).
For torsion tests, I have taken equivalent tensile stress = shear stress*sqrt(3) and equivalent tensile strain as = shear strain / sqrt (3).
This is based on Von Mises criteria.
I've implemented the source code of four-node superparamtric shell. But I failed to obtain the right results. I check the formulas and code carefully. Can u help or discuss with me ? Thks.
Hi all,
I wanted to simulate fatigue crack growth in ls-dyna, obtain dK, crack tip stress fields. But I wanted to start from a simple model. I can't find any examples online, tutorial...