含微裂纹的退役发动机凸轮轴剩余寿命分析  

Analysis of the Residual Life of Retired Engine Camshafts with Micro-cracks

作　　者：张平 廖燚宗 陈森昌 ZHANG Ping;LIAO Yizong;CHEN Senchang(School of Automobile and Transportation Engineering,Guangdong Polytechnic Normal University,Guangzhou Guangdong 510665)

机构地区：[1]广东技术师范大学汽车与交通工程学院,广东广州510665

出　　处：《广东技术师范大学学报》2024年第3期1-6,15,共7页Journal of Guangdong Polytechnic Normal University

摘　　要：退役发动机凸轮轴在服役周期内容易出现各种疲劳损伤,其中微裂纹是常见的一种损伤形式,而且在后续的再制造加工中很难修复和去除.基于ANSYS软件,根据凸轮轴可能出现裂纹的情况,在凸轮轴不同位置预制周向和轴向半椭圆形微裂纹.对含有微裂纹的凸轮轴进行应力分析,获得凸轮轴的应力数据.将应力数据导入疲劳分析软件nCode Designlife中,对凸轮轴进行疲劳寿命分析,研究不同位置和方向的裂纹对凸轮轴剩余寿命的影响.分析结果可作为退役发动机凸轮轴再制造的理论判据.Various forms of fatigue damage often occur in retired engine camshafts during their service life,among which micro-cracks are common.These micro-cracks are difficult to repair and remove in subsequent remanufacturing processes.Based on ANSYS software,this paper predefines circumferential and axial semi-elliptical micro-cracks at different positions on the camshaft according to the possible occurrence of cracks.Stress analysis is performed on the camshaft containing micro-cracks to obtain stress data.The stress data is then imported into the fatigue analysis software nCode Designlife to conduct a fatigue life analysis of the camshaft.This study investigates the impact of cracks at different positions and directions on the residual life of the camshaft.The analysis results can serve as a theoretical criterion for the remanufacturing of retired engine camshafts.

关 键 词：凸轮轴 剩余寿命 裂纹 

分 类 号：TK412[动力工程及工程热物理—动力机械及工程]