Impact analysis of casting parts considering （铸造零件的影响分析考虑）.pdf

CHINA FOUNDRY Vol.8 No.1 Impact analysis of casting parts considering shrinkage cavity defect 1,2 2 1,2 *Si-Young Kwak , Jie Cheng and Jeong-Kil Choi (1. Center for e-Design, Korea Institute of Industrial Technology, Incheon 406-800, Korea; 2. Department of Virtual Engineering, School of Engineering, Korea University of Science Technology, Daejeon, Korea) Abstract: Shrinkage cavity may be detrimental to mechanical performances of casting parts. As a consequence, design engineers often use overly large safety factors in many designs due to insufficient understanding of quantitative effects of shrinkage cavity defects. In this paper, process of Al alloy wheel impact test was computationally analyzed for both the wheel models with and without shrinkage cavity defects. Based on shrinkage cavity data obtained from industrial CT (Computerized Tomography), the shrinkage cavity defects were modeled with SSM (Shape Simplification Method), which reconstructs shrinkage cavity defects to hollow spheroid primitives. After the impact simulation was conducted, the results show that under impact test condition, the wheel considering shrinkage cavity defects may fracture while the sound-assumed wheel may not. Key words: casting; shrinkage cavity defect; impact; computational analysis; Al alloy wheel CLC numbers: TG29/TP391 Document code: A Article ID: 1672-6421(2011)01- 112-05 n recent years, cast aluminum alloy wheels have been used Iwidely in auto