Review on research and development of fatigue life of automotive transmission

LIU Xin-meng，HU Zhi-liang，XIE Li-yang，HE Xue-hong

（School of Mechanical Engineering and Automation，Northeastern University，Shenyang 110004，China）

Abstract： To further promote the development of automotive transmission fatigue life studies，based on the characteristics and applications of fatigue life research methods about the automotive transmission，the current research status of relevant literatures were reviewed，transmission fatigue life was studied from the aspects of the transmission of loads，fatigue test of transmission and fatigue life prediction of transmission. Aiming at the transmission load spectrum，the existing methods of compiling transmission load spectrum were analyzed and summarized. The results indicate that，compiling program load spectrum of transmission is the most accurate and effective method. To fatigue test based on different loads，the load and test results were analyzed. The results indicate that the actual work process can be well simulated by the test based on program load spectrum and the test results are the most accurate. By analyzing several commonly methods of predicting transmission life，the results show that，the method of predicting probability fatigue life can provide more comprehensive data for the study and maintenance of transmission and is the focus of future research. Finally，the possible research focus and directions in the transmission load spectrum，the design of fatigue test-bed，virtual test and numerical simulation of transmission fatigue were put forward.