# M. Lamzoughi

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3

• Rank
Newbie

## Profile Information

• Country
Germany
• Are you University user?
Yes

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1. ## non-convergence by nonlinear-quasi-static Analysis

Hello Prakash, thank you so much for you response. Attached you find *.out files form converged and non-converged runs. Best regards M. Lamzoughi Netz_0-03_non_conver.out Netz_0-05.out
2. ## non-convergence by nonlinear-quasi-static Analysis

Hello everybody, I’m running a nonlinear-quasi-static analysis with OptiStruct and I have got some troubles with convergence. What I exactly did is, running the same analysis for the same model but with different element sizes and when I mesh with very small size othewise by small size elements I get that problem with non convergence. My model is built of 2 parts, the first one is fixed from one side and the other one presses the first part through radial and axial forces, between those parts I've built a contact. (see the following figure) You find attached an Excel-file where some results are showed, so you can get a good idea about. It would be kind of you if you could help me to solve this problem. Thank you in advance Best Regards M. Lamzoughi comparison.xlsx
3. ## Impact Analysis With RADIOSS

Dear Altair team, The fact is that I'm about to execute an academic project as Quasi-Static-Analysis with RADIOSS, so I've got several problems due to my level of beginner in that field and also to the complexity of that mechanism; for this reason I'm writing on this forum in the hope to find some answers to my questions. Firstly I would like to know how to define the impact force between two solids (impactor+head) and as a consequence the path of the energy flowing through the mechanism? The second point is how to create a pre-stress in a bolt? P.S.: I've attached a file with a picture, which shows the form and the components of the mechanism. Thank you so much in advance. Best Regards Lamzoughi Infos.doc
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