Simulation time too high (simple model to demonstrate the problem)
I am trying to estimate the forces it will take to break the Rivets. The run time is too high. I created a simple model to demonstrate the issue with my setup. Attaching the dummy model that recreates the error. Need help fixing the issues in my model.
Best Answer
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Timestep in explicit analysis is derived from:
smallest element size/ SQRT(Modulus/Density)
Your mesh is too poor in quality to work well and leads to timesteps of order of magnitude 6e-12ms
In attached version, I roughly remeshed your 'strap' to be better mesh and made the 'tube' rigid, since it looked like that was what you were trying to do with it anyway? I also added mass scaling to raise timestep to 1e-3ms (it adds 180% mass, but since the model is quasi static, this should be ok.
I would recommend reading the Radioss E-book : ebook
Or following some of the tutorial examples in the help as an introduction to explicit analysis
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Altair EmployeeAnswers
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Timestep in explicit analysis is derived from:
smallest element size/ SQRT(Modulus/Density)
Your mesh is too poor in quality to work well and leads to timesteps of order of magnitude 6e-12ms
In attached version, I roughly remeshed your 'strap' to be better mesh and made the 'tube' rigid, since it looked like that was what you were trying to do with it anyway? I also added mass scaling to raise timestep to 1e-3ms (it adds 180% mass, but since the model is quasi static, this should be ok.
I would recommend reading the Radioss E-book : ebook
Or following some of the tutorial examples in the help as an introduction to explicit analysis
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Thank you Paul for the suggestions. Indeed after incorporating your suggestions (I remeshed the models carefully, and also specified minimum time step), the model runs a lot faster. The ebook is very useful especially for me since I am learning Radioss.
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