某电动轻卡转向节臂断裂失效分析及优化  

Analysis of the electric light truck steering knuckle arm rupture and structure optimum

作　　者：朱金宝 宋小伟 肖聪 王涛 范学群 Zhu Jinbao;Song Xiaowei;Xiao Cong;Wang Tao;Fan Xuequn(Dongfeng Automobile Co., Ltd., Hubei Wuhan 430057;Aerospace Heavy Industry Co., Ltd., Hubei Xiaogan 432000)

机构地区：[1]东风汽车股份有限公司,湖北武汉430057 [2]航天重型工程装备有限公司,湖北孝感432000

出　　处：《汽车实用技术》2019年第13期3-5,共3页Automobile Applied Technology

摘　　要：文章就某电动轻卡转向节臂出现断裂问题,通过材质、力学性能检测及CAE结构强度分析,得出断裂主要原因在于节臂转弯处薄弱,发生疲劳断裂;对薄弱处进行加强优化,表面进行喷丸强化处理,疲劳寿命得到极大提升。经过疲劳试验及可靠性路试验证,优化措施切实有效。The rupture of the electric light truck steering knuckle arm was analysed through material mechanical checking and finite element simulation.The result indicated that the insufficient strength of turning point in the arm was the principal cause of failure.Enlarging the weak structure and shot peening strengthening were applied to improve arm fatigue life.These optimization measures were proved excellent by practical experiments.

关 键 词：转向节臂 断裂 疲劳分析 结构优化 

分 类 号：U463.46[机械工程—车辆工程]