On the Effect of Through-Thickness Integration for the Blank Thickness and Ear Formation in Cup Drawing FE Analysis

Bora ŞENER, Toros Arda AKŞEN, Mehmet FIRAT
2020 European Mechanical Science  
Various numerical parameters such as element size, mesh topology, element formulations effect the prediction accuracy of sheet metal forming simulations and wrong selection of these parameters can lead to inaccurate predictions. Therefore, selection of proper numerical parameters is crucial for obtaining of realistic results from finite element (FE) analyses. In the present work, influence of the number of through-thickness integration points from the numerical parameters was investigated on
more » ... cup drawing simulation. Highly anisotropic AA 2090-T3 aluminum alloy was selected as test material and the anisotropic behavior of the material was defined with Barlat 91 yield criterion. Firstly, cup drawing model was created with implicit code Marc and then FE analyses were performed with five, seven and nine layers to investigate the effect of number of throughthickness integration points. The computed earing profiles and thickness strain distributions were compared with measurements. Comparisons showed that the angular locations of maximum cup heights and thickness strain distributions along rolling and transverse directions were captured accurately by Yld91 yield criterion and also it was observed that the layer number effects the maximum cup height and thickness strain distribution along the rolling direction.
doi:10.26701/ems.781175 fatcat:d3s27sa45basdhsfyjcf5qpdl4