{"id":379196,"date":"2024-08-15T16:40:32","date_gmt":"2024-08-15T16:40:32","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/laminated-composite-stiffened-platestiffened-panels\/"},"modified":"2024-08-15T16:40:32","modified_gmt":"2024-08-15T16:40:32","slug":"laminated-composite-stiffened-platestiffened-panels","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/laminated-composite-stiffened-platestiffened-panels\/","title":{"rendered":"laminated composite stiffened plate\/stiffened panels"},"content":{"rendered":"

I simulated a laminated composite plate that has a ‘foot’ supported halfway. However, the analytical results are different from the numerical simulation and the numerical simulation presents two different results. The plate has the stacking [-45 90 45 0]s and the ‘foot’ [45 0 -45 0 -45 0 45].  The thickness of the layers is 0.125 mm. The foot was connected to the plate by bonded contact. The following simulation results were obtained:<\/p>\n

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The buckling load was 61.958 kN<\/p>\n

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However, if only a plate is modeled in which half of it has stacking of [-45 90 45 0 0 45 90 -45 45 0 -45 0 -45 0 45] (superposition of plate+stiffener stacking) and the other half of [-45 90 45 0]s, the buckling load obtained was from 181.64 kN<\/p>\n

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Why did this large difference in buckling loads occur?<\/p>\n

When a uniform thickness plate with the stacking of [-45 90 45 0]s is modeled, the buckling load is 62.89 kN . When the stacking of [-45 90 45 0 0 45 90 -45 45 0 -45 0 -45 0 45] is considered, the load is 464 kN. <\/p>\n

other question: bonded contact couples all degrees of freedom of the plate and foot nodes with equal coordinates?<\/p>\n

If not, how do I do that?<\/p>\n

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Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-379196","topic","type-topic","status-publish","hentry","topic-tag-acp","topic-tag-acp-compositematerials-2","topic-tag-acp-pre","topic-tag-ansys-acp","topic-tag-AnsysWorkbenchacpBCs-1","topic-tag-carbon-fiber-composite","topic-tag-composite-analysis","topic-tag-composite-laminates-1","topic-tag-composite-modeling","topic-tag-plate-1","topic-tag-rectangular-plate","topic-tag-thin-plate"],"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