Transactions of Materials and Heat Treatment

Title：Influence of the blanking burr on fatigue life based on numerical simulation methods

Authors： Luo Deyang1 Hu Zhaohui2 3 Liao Yi1 Yu Yi1

Unit： SAIC GM Wuling Automobile Co. Ltd. Hunan University AISN Innovative Design and Manufacturing Co.

KeyWords： blanking burr stress concentration fatigue life line spring model damage theory of fatigue accumulation

ClassificationCode：TG386；U465.1

year,vol(issue):pagenumber：2016,41(12):46-52

Abstract：

For the blanking burr that influencing the fatigue performance, the burr was numerically simulated by line spring model, and a new calculation method was proposed considering the influence of the blanking burr on fatigue life. Then, the influence of the burr on the geometric boundary stress of the part structure was calculated quantitatively, and the stress concentration caused by the burr was obtained. Furthermore, combining the materials stress-life curve with the load spectrum, the fatigue life of part was calculated by the damage theory of fatigue accumulation, and the fatigue life of part with and without adding element burr was calculated in the numerical simulation analysis. Finally, the fatigue life calculation was verified by experiment. The result indicates that the calculation precision of fatigue life can be improved by considering the influence of the burr on structure quantitatively.

Funds：

湖南省自然科学基金资助项目（13JJB003）；广西科技开发计划（桂科重14122002-2）；广西汽车公共服务平台建设项目（20130301）；广西科学研究与技术开发计划项目（15129001）

作者简介：罗德洋（1989-），男，硕士 E-mail：deyang.luo@sgmw.com.cn 通讯作者：廖毅(1973-)，男，硕士，高级工程师 E-mail：liao.yi@sgmw.com.cn

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