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Hi FEA way! It is ABAQUS2020. I think it is not the problem with format. The size setting should not change randomly no matter which format is chosen. In fact, I always record my screen with Abaqus animation playing. So, I guess that there must be something else to affect the image size setting.

I use the following settings to save animation from ODB results. However, the image size often changes. For example, the size was 4096*2252 in my last saving, but it goes 4096*2273 this time. It seems that the size setting is randomly changing. And the terrible thing is that I can not change it...

If you are particularly familiar with this aspect, please also provide practical advice. I would be very grateful!

I found these words in document,"For ABAQUS/Explicit the default value for the tangent fraction is 1.0; therefore, by default, the damping coefficient for the tangential direction is equal to the damping coefficient for the normal direction. Furthermore, in ABAQUS/Explicit softened contact and...

Which one is the default setting? All I can find in the ABAQUS document is that "For ABAQUS/Explicit the default value for the tangent fraction is 1.0". But I just want to know if the default setting is "DAMPING COEFFICIENT" or "CRITICAL DAMPING FRACTION" and their default value.

Thanks, I'll give it a try.

Linear elasticity

By the way, the coupling settings.

Hi FEA way! Yes, the analysis stops due to excessive element distortion (A sharp quadrilateral in fig2).I've refine the mesh with high seed density at both ends, gradually transitioning to lower density in the middle. Total number of elements is 52696(as shown in the screenshot 1). The job runs...

I am using ABAQUS/Explicit to simulate the process of twisting and unloading a elastic strip. In my project, the twist moment must be high enough to make the strip almost buckled. However, in the unloading process, the mesh suddenly deteriorates at a certain moment. It seems like a common...

Thanks for your advice!

Dear FEA way, have you ever used the PolyUMod? Do you know how to export UMAT of the desired material model. The "export model" button only offers parameters without UMAT.

Thanks FEA way, it really helps!

Sorry for missed information. The material is nylon wire. The different colors means tension cycle with increasing maximum strain. The model for material simulation is just a rod with one side fixed and one side moved with a prescribed displacement along the rod. The free end displacement and...

In my project, the material shows high plasticity, about which I know little. After reading some related papers, I find that the key is to simulate the cyclic uniaxial tensile test data from experiments. I used the Combined Hardening and Cyclic Hardening in...

Thanks a lot!

Thanks for your advice. BTW, do you know how to bend the beam by setting rotation on its free side? I coupled the free side with continuum distribution, and apply rotation at the key point. But the beam only bends in a very small area near the free side.

If I remove the boundary condition in the subsequent steps, will the deformation caused by the subsequent load disappear?

Thanks for your kind reply. However, in the following step, the sheet will be applied higher temperature to expand and the former bending and twisting will be unloaded. It seems that your rotation method is not suitable for this situation.

I need to bend and twist a sheet into a spiral, but it is difficult to make it by setting moment at one side of the sheet with the other fixed. Maybe there is a more effective way to do this?