B24 FEM Simulation on Sensitivity of Crack Propagation on Aluminum Sheet during Wedge Shearing Process(Advanced machining technology)

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概要

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• This study aims to clarify the sensitivity of crack propagation during wedge shearing process of an aluminum worksheet. One of the problems faced in wedge cutting process is the upsetting deformation of lower surface of worksheet due to the large tip thickness of knives. In order to investigate the stability of crack generation between lower surface and upper surface of deformed worksheet, an indentation of center bevel blade into a 0.4mm thickness of A1050P aluminum sheet was carried out by varying the tip thickness of cutting blade. For discussing the sensitivity of crack propagation, the finite element analysis (FEA) with elasto-plastic model and ductile fracture criterion was conducted. Through this study, the following are found: (i) the sensitivity of crack generation of aluminum sheet depend on the tip thickness, and the crack generation was observed for 40μm<w<90μm. (ii) the necking behavior on the lower surface of worksheet is contributed to the cracking sensitivity. (iii) the sensitivity of crack generation at the lower surface of wedged sheet is faster than the upper side.

• 2009-12-01

著者

• Nagasawa Shigeru

  Mechanical Engineering Department Nagaoka University Of Technology

• Chaijit Seksan

  Mechatronics Engineering Department Pathumwan Institute Of Technology

関連論文

• B22 Deformation Analysis of Polycarbonate Sheet with Flexible Underlay During Wedge Cutting Process(Advanced machining technology)
• B24 FEM Simulation on Sensitivity of Crack Propagation on Aluminum Sheet during Wedge Shearing Process(Advanced machining technology)

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