Numerical Simulation and Damage Fracture Prediction for Thick Sheet Metal Fine-blanking based on Mixed Displacement-Pressure FEM

Acta Metall Sin

2006, Vol. 42

Issue (10): 1115-1120 DOI:

Research Articles

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Numerical Simulation and Damage Fracture Prediction for Thick Sheet Metal Fine-blanking based on Mixed Displacement-Pressure FEM

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上海交通大学塑性成形工程系

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;. Numerical Simulation and Damage Fracture Prediction for Thick Sheet Metal Fine-blanking based on Mixed Displacement-Pressure FEM. Acta Metall Sin, 2006, 42(10): 1115-1120 .

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Abstract Local plastic shearing band is initialized near blanking clearance during fine-blanking, and forming failures such as ductile fracture and large roll-over usually occur. By using MSC/MARC software, an axisymmetric FE model is created, and mixed u-p updated Lagrange FEM is used to simulate the severe plastic deformation, which could overcome shear locking and volume locking. Together with adaptive remeshing technique based on strain gradient and surface curvature, the strain localization phenomenon could be captured. Schiffmann damage work density model is used to predict the developments of damage and fracture in sheet metal. The height of roll-over, height of burnish band and fine-blanking force are predicted, and qualified part was obtained using optimized process parameters from simulation.

Key words: fine-blanking damage ductile fracture mixed displacement-pressure FEM adaptive remeshing

Received: 24 February 2006

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2006/V42/I10/1115

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