When programming with finite elements, errors(means stress sigularity) ofen occured. And determine the source of an error is difficult sometime. Because it may be an logic error or just an error caused by inappropriate parameters, such as inappropriate Young’s modulus or too big forces etc . What confusing me is that how to be sure about the souce of an error, is it caused by logic or just inappropriate parameters?
Understanding the source of an error is physics simulation is often complex due to the different possible cause of errors, as you explained. Therefore, there is no straightforward answer.
Numerical analysis is one the main key : analyzing the system matrix, the force vectors, the convergence of the solver and the input parameters. We are working at providing tools like easy export of system matrix, which is not allowed yet. Python can be a powerful tool as well for this.
Thanks a lot!
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