初始裂纹位置对重型变速器齿轮裂纹扩展行为的影响

Effect of Initial Crack Position on Crack Propagation Behaviors of Heavy-Duty Transmission Gear.

作者信息

Zhang Yingtao, Tang Zirong, Zhao Lijuan, Gong Benxiang, Wang Gang, Li Zhichao

机构信息

College of Mechanical & Electrical Engineering, Hohai University, Changzhou 213022, China.

Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipments and Control, Tsinghua University, Beijing 100084, China.

出版信息

Materials (Basel). 2023 Aug 31;16(17):5961. doi: 10.3390/ma16175961.

DOI:10.3390/ma16175961

PMID:37687655

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10488885/

Abstract

The tooth bending fatigue fracture is caused by the alternating loads for the heavy-duty transmission gears. The crack initiation and propagation are the two major parts in the failure process. The crack propagation behavior is mainly affected by initial crack position except for the load and material properties. In this paper, the crack propagation model of a gear is established under the considering of crack initiation location by using extended finite element method (XFEM). The model accuracy is verified by testing results of strain and fractography by conducting the single-tooth bending fatigue experiment. The influence of crack initiation locations on subsequent crack propagation behavior is analyzed. The crack length in the tooth width direction and depth direction is faster when the initial crack is located in the middle of root surface. The crack growth rate is lower for the initial crack located in the surface close to the end surface of the gear.

摘要

重载传动齿轮的交变载荷会导致齿面弯曲疲劳断裂。裂纹萌生与扩展是失效过程的两个主要部分。除载荷和材料性能外，裂纹扩展行为主要受初始裂纹位置的影响。本文采用扩展有限元法（XFEM），在考虑裂纹萌生位置的情况下建立了齿轮裂纹扩展模型。通过单齿弯曲疲劳试验的应变和断口形貌测试结果验证了模型的准确性。分析了裂纹萌生位置对后续裂纹扩展行为的影响。当初始裂纹位于齿根表面中部时，齿宽方向和深度方向的裂纹长度增长较快。当初始裂纹位于靠近齿轮端面的表面时，裂纹扩展速率较低。