农业装备与车辆工程2026，Vol.64Issue(1)：55-58,4.DOI:10.3969/j.issn.1673-3142.2026.01.008
汽车悬架减振器活塞杆安装失效原因分析
Analysis of installation failure causes of automobile suspension shock absorber piston rod
摘要
Abstract
To address the fracture issue of the piston rod during a 30 N·m static torsion strength test,a combined approach of fracture surface electron microscope observation and finite element simulation was adopted for analysis.The results indicated that the fracture occurred at the internal hexagonal hole,and the fracture surface exhibited brittle fracture characteristics such as cleavage steps and river patterns,with no cracks,cavities,or inclusions detected.Simulation results revealed the presence of stress concentration at this location,where the maximum equivalent stress reached 678.14 MPa,exceeding the yield strength of the base material(660 MPa).Based on comprehensive analysis,the primary cause of failure was determined to be overload fracture induced by unreasonable structural design.This study provides a theoretical basis for the structural optimization of the piston rod.关键词
活塞杆/断口分析/有限元分析/失效机理Key words
piston rod/fracture analysis/finite element analysis/failure mechanism分类
机械制造引用本文复制引用
马潇坤,张振隆,邵鑫竹,高坤..汽车悬架减振器活塞杆安装失效原因分析[J].农业装备与车辆工程,2026,64(1):55-58,4.基金项目
大学生创新训练计划项目(S202510154008) （S202510154008）
辽宁省重点研发计划(创新联合体)项目(2025JH2/102700008) （创新联合体）
