{"id":396981,"date":"2024-12-10T19:26:48","date_gmt":"2024-12-10T19:26:48","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-of-composite-tensile-test-using-acp\/"},"modified":"2024-12-10T19:28:06","modified_gmt":"2024-12-10T19:28:06","slug":"convergence-of-composite-tensile-test-using-acp","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-of-composite-tensile-test-using-acp\/","title":{"rendered":"Convergence of Composite Tensile Test Using ACP"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;I have performed a physical tensile test on a unidirectional glass fiber composite material, and I am trying to replicate the results in Ansys using ACP. I cannot get the model to converge at the elongation that I saw in the actual test.&lt;\/p&gt;&lt;p&gt;Test specimen is modeled as a surface. The surface is meshed and then imported into ACP. Apply material and plys to a the surface using standard ACP shell mesh method. Note, the material is a custom composite material where I defined materials properties based off the actual tensile test data.&lt;\/p&gt;&lt;p&gt;Import the ACP data into a Transient Structural analysis with Large Deflections enabled. The tensile test was performed at 1mm\/min. I have fixed one side of the test sample, and I have applied a tabular displacement to the other side to move from 0mm to 3mm over 180sec. The actual samples all failed between 3 and 4mm.&lt;\/p&gt;&lt;p&gt;I have tried many different combinations.&lt;\/p&gt;&lt;\/p&gt;<\/p>\n<ul>\n<li>Element type: Program Controlled and Linear.<\/li>\n<li>Application Based Setting:s Quasi-Static, Low Speed Dynamics, and Medium Speed Dynamics.<\/li>\n<li>Adjusted the minimum time substep from 0.1 to 0.0001 sec.<\/li>\n<\/ul>\n<p>&lt;p&gt;&lt;p&gt;In every case, it stops converging around 90sec or 1.5mm of deflection. The partial result appear to match the test, but I would like to test until that 3-4 mm. I have enabled Newton-Raphson Residual Force plots. They indicate the issues are at the edges of my test specimen. See below.&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/10-12-2024-1733857913-mceclip0.png\" \/>&lt;\/p&gt;&lt;p&gt;Sample Partial Results&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/10-12-2024-1733858578-mceclip2.png\" \/>&lt;\/p&gt;&lt;p&gt;Newton-Raphson Risidual Force plot&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/10-12-2024-1733858620-mceclip3.png\" \/>&lt;\/p&gt;&lt;p&gt;Force Convergence plot from Solution Information&lt;\/p&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/12\/10-12-2024-1733858869-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-396981","topic","type-topic","status-publish","hentry","topic-tag-acp-compositematerials-1","topic-tag-material-damage","topic-tag-transient-structural"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"I have performed a physical tensile test on a unidirectional glass fiber composite material, and I am trying to replicate the results in Ansys using ACP. I cannot get the model to converge at the elongation that I saw in the actual test.Test specimen is modeled as a surface. The surface is meshed and then\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-of-composite-tensile-test-using-acp\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Convergence of Composite Tensile Test Using ACP | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"I have performed a physical tensile test on a unidirectional glass fiber composite material, and I am trying to replicate the results in Ansys using ACP. 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