重卡车架用固定螺栓失效分析及方案优化

Failure Analysis and Scheme Optimization of Fixing Bolts for Heavy Truck Frames

螺栓连接的失效问题为汽车行业当前所关注的重点课题。文章基于某重型越野车在试验过程中出现的螺栓断裂问题,首先按照汽车标准件手册选用紧固件,其次对断裂螺栓进行宏观观察,找到断裂起源区,然后对断裂螺栓进行了理化分析及计算机辅助工程(CAE)分析。通过深入分析找到了失效原因,并提出了预防失效的方法措施,为解决固定螺栓断裂提供一个可行思路。

The failure problem of bolted connection is the focus of the automobile industry.Based on the bolt breakage problem of a heavy off-road vehicle in the test process,this paper firstly selects fasteners according to the automobile standard parts manual,and then makes a macroscopic observation of the broken bolts,finds the origin area of the fracture,and then carries out physical and chemical analysis and computer aided engineering(CAE)analysis of the fracture bolts.Through the in-depth analysis of the failure causes,the failure causes are found,and the preventive measures are put forward,which provides a feasible idea for solving the fixed bolt fracture.