Three-Dimensional Extended Analysis and Life Prediction of Gear Crack

摘要：

　　Based on the linear-elastic fracture theory,the fracture damage of gear structure is studied.By using the professional fracture analysis software FRANC3D,a three-dimensional propagation analysis is investigated for tooth root crack in involute gear,and also solving the three types of stress intensity factor(SIF) in tooth root semicircle crack tip,its changing rule and the 3D stress intensity factor formula are obtained.On this basis,a simulation analysis and study is conducted on propagation route of 3D tooth root crack,and the correctness of the analysis results is verified by comparing with the experimental results.Finally according to the mutation of maximum stress intensity factor in the crack tip,the fracture damage of gear teeth is predicated,and its working life is forecasted.By analyzing the different crack size,it is concluded that crack propagation velocity is very sensitive to crack initial length; initially,crack propagation slowly grow,with the increasing of crack length,the crack propagation will rapidly accelerate.The cycle life of fatigue crack in involute gear is about 1.85E5 times.All these findings have important significance for life estimation and failure detection of gear.

关键词： Gear 3D Crack Stress Intensity Factor(SIF) FRANC3D

作者: Jie MA Renping SHAO Feifei DONG

作者单位: School of Mechatronics, Northwestern Polytechnical University, Xian, Shannxi, 710072,China

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 4863-4869

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）