There are a lot of sample UMAT subroutines for plane strain or 3D problems. However, it is difficult to find an example for the plane stress problem online. Even the UMAT manual does not provide enough information. I have tried the UMAT subroutine for the plane stress problem for a while. The following remarks may be useful for collegues who have interest.
1. The stress components σ11, σ22, σ12 should be returned to UMAT. The other three stress components equal to zero, known as the basic assumption of the plane stress problem.
I model a brb(Buckling restrained brace) in Abaqus but my question is How to put concrete in a brb or How do I define the concrete inside the brb that work together? i use tie constraint But there isn't any stress for concrete! i use static,General for analysis! is it correct?
Hi, I know you place tremendous value on your time so I’ll be brief. I am trying to do a thermo-mechanical analysis of a closed region (H=75cm). In this region, at the bottom, the Temperature is around 700 degree. A structural beam is placed at the height of 25 cm from the bottom surface in closed region. I want to simulate the heat transfer from the bottom surface to beam due to convection (because air is there as a medium in closed region) and radiation.
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Hi I tried to mesh these two plates with two cases having different geometries. I am trying to achieve something similar in complex geometry in abaqus. But I think the problem is with shapes or if it is something else, please help me with this. I tried in solid elements too it did not work either. I have attached image where you can see two cases
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I am currently working on modelling ITZ zones in concrete 2D microstructure. ITZ is the cement paste zone near the surface of aggregate which differs in properties from bulk cement paste. The thichness of ITZ zone ranges from 10-50 micrometer (0.01 - 0.05 mm). The size of RVE I am using is 100X100 mm which makes ITZ a very fine detail in my microstructure. I have created a instance in abaqus merging all parts, Aggregate, ITZ and Matrix( Cement Paste).