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I would like to simulate a compression test with an analytical rigid body (velocity) and a specimen with an encastre bottom. The arrow on the reference point indicates the correct direction of velocity. In the first time step the rigid body seems to slide on the surface of the specimen. There...

Thank you very much. I know that some people are using this material modell. But I want to know if it is implented in every ABAQUS and how to find it. LS-Dyna has a very good user manual where several material models are listed and they are easy to use. Does something similar exist for ABAQUS...

Hallo all I want to use the Zerilli Armstrong constitutive material equation to describe the material behaviour. I can't find it in ABAQUS. Maybe it is hidden somewhere in the program. I don't know. If it is not embedded I have to use UMAT, is that right. Is it very complex programming? Thank...

In the elastic-case it uses Poisson ratio... My question was what is used when plastic deformation occurs.

In Abaqus there is a way to define Material properties. For example a plastic material with specific yield point. This yield stress is from tensile tests (uniaxial). My question is how does the program solve a triaxial stress state with this uniaxial parameter. I think it uses comparision...

Thanks for your answers. It's a repeated bouncing of a ball with a definite velocity. After the ball has rebounced it has to be put away from the impact with a definite distance. The calc. is explicit. that's why i have a problem with the displacement /amplitude

It's an explicit simulation... @nileo2005: You are writing about 'second option'. What would be the first option. If I put the sphere onto the block in the 'part module' there are sometimes problems with the mesh. But sometimes it works. But then there is another problem with the amplitude: As...

Hallo, I have created a sphere (3-D deform solid) 5mm above a steel block (3-D deform solid). I want to set the sphere onto the block (5mm down) and then add a force to the sphere. For the force I used 'body force'. Works very well. The problem is the displacement at the beginning. The program...

It works! Thank you so much... This was very helpfull for me.

It's about modelling. I've creating a circle in the "sketch". The problem is to to get a sphere out of the circle when I want to creat the part Than You

Hallo all, I'm a novice at ABAQUS 6.9 and have a little problem. I'm trying to create a sphere-model and it doesn't work. I hope the problem not too easy for you... It would be fine to get a response. Thank You