{"id":310821,"date":"2023-10-10T12:21:40","date_gmt":"2023-10-10T12:21:40","guid":{"rendered":"\/forum\/forums\/topic\/paperboard-composite-quasi-static-analysis-in-ls-dyna-and-explicit-dynamics\/"},"modified":"2023-10-10T12:21:40","modified_gmt":"2023-10-10T12:21:40","slug":"paperboard-composite-quasi-static-analysis-in-ls-dyna-and-explicit-dynamics","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/paperboard-composite-quasi-static-analysis-in-ls-dyna-and-explicit-dynamics\/","title":{"rendered":"Paperboard Composite quasi-static analysis in LS-DYNA and Explicit Dynamics"},"content":{"rendered":"

Dear ANSYS community,<\/p>\n

I am currently engaged in modeling a quasi-static compression analysis on structures constructed from paperboard. In my pursuit of precise design, I recognized the value of commencing with a simplified plate model to proactively identify potential errors. My material of choice is orthotropic elastic with multilinear isotropic hardening and the Hill yield criterion. I initially created the composite part using ACP and subsequently transferred the shell composite data to Static Structural, LS-DYNA, and Explicit Dynamics.<\/p>\n

For your reference, I have included a visual representation of my workflow and a related case study in the form of an image, which can be viewed in this YouTube video: [insert link here<\/a>].<\/p>\n

However, I am encountering a significant issue in my simulation. Specifically, when I enable the multilinear isotropic hardening and Hill yield criterion in the material definition, LS-DYNA produces an error (*** Error 40724 (SOL+724) routine eigab fails to obtain eigenvalues), and Explicit Dynamics also fails with the error message stating, “Could not transfer material Sheet A 190 gsm to the solver. Error reading in the CAERep from Simulation.”<\/p>\n

Curiously, when I suppress the multilinear isotropic hardening and Hill yield criterion in the material definition, both LS-DYNA and Explicit Dynamics perform as expected without errors. I am seeking guidance to diagnose and address the root cause of this simulation problem.<\/p>\n

Any insights or assistance from the community would be greatly appreciated.<\/p>\n

Thank you.<\/p>\n

<\/p>\n

<\/p>\n

<\/p>\n","protected":false},"template":"","class_list":["post-310821","topic","type-topic","status-closed","hentry","topic-tag-LS-DYNAruntime-1","topic-tag-acp-explicit-dynamics-1","topic-tag-compositematerials-1","topic-tag-Multilinearisotropichardeningmodel-1","topic-tag-orthotropic-materials"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t