Hi,

When modelling a material testing in ABAQUS, the mesh is obviously of great importance. I want to model a specimen of the size 1x1x10 cm, and I tried with two meshes, according to the picture (the first one with 100 elements lengthwise and the second one with 500 elements). The results differ significantly - and the specimen even bends in different directions in the two cases.

The material model is a J2 pasticity model. The top surface is restricted in z-direction, and a point on the top surface is chosen to be restricted in the xy-directions. The bottom surface is then displaced 3 cm upwards.

Since I'm new to FE-modeling, does anybody have any comments on this behavior? How should I proceed in order to get a valid model?

Thanks,

wort

When modelling a material testing in ABAQUS, the mesh is obviously of great importance. I want to model a specimen of the size 1x1x10 cm, and I tried with two meshes, according to the picture (the first one with 100 elements lengthwise and the second one with 500 elements). The results differ significantly - and the specimen even bends in different directions in the two cases.

The material model is a J2 pasticity model. The top surface is restricted in z-direction, and a point on the top surface is chosen to be restricted in the xy-directions. The bottom surface is then displaced 3 cm upwards.

Since I'm new to FE-modeling, does anybody have any comments on this behavior? How should I proceed in order to get a valid model?

Thanks,

wort

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