March 26, 2023 at 1:20 pmnajsaSubscriber
Hi there! I'm currently working on a cyclic loading analysis for a pipe member, but I'm having trouble getting the solution to converge during the tensile stages. I've noticed that stress is concentrating at the edges of the pipe, as you can see in the screenshots I've attached. Although my main focus is on buckling, I'm struggling to figure out why the analysis keeps crashing when I try to simulate tension. I've included a graph of the loading, which is supposed to repeat the same displacement values three times in addition to other cycles(Ive included another graph example), but the solution crashes during tension. Can anyone offer any suggestions for what might be causing this issue and how I can resolve it? Thanks in advance for your help!
March 27, 2023 at 12:02 pmAshish KhemkaAnsys Employee
The elements look distorted. Can you please check the output?
March 27, 2023 at 8:14 pmnajsaSubscriber
Yes I forgot to mention that I read the output and tried to apply the suggestions but nothing happened to come in handy. (Try
incrementing the load more slowly (increase the number of substeps or
decrease the time step size). You may need to improve your mesh to
obtain elements with better aspect ratios. Also consider the behavior
of materials, contact pairs, and/or constraint equations. Please rule
out other root causes of this failure before attempting rezoning or
nonlinear adaptive solutions.)
March 28, 2023 at 6:08 amAshish KhemkaAnsys Employee
Please see if the following post helps: Dealing with Convergence Issues - Element Distortion Error - FEA Tips
Also, are you applying load on edge? If yes then try applying the load on an area instead of edge.
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