Fracture Reason Analyzing for Telescopic Hydraulic Damper Piston Rod Based on Virtual Prototyping Technology
The piston-rod of telescopic hydraulic damper is fractured after tracked vehicle running a certain motor hours and failure modes are almost the identical. For analyzing the fracture mechanism, a dynamic model of telescopic hydraulic damper is built based on multi-bodies system dynamics theory in this article. Some actual operating modes are simulated on the dynamic boundary condition of whole tracked vehicle dynamic model, and the stress distribution of piston-rod is attained by rigid stress recovery method. The research results show that stress concentration and bend fatigue load, which is loaded on the root part of the piston-rod, are main reasons for the fracture failure. By setting different simulation conditions of telescopic hydraulic damper, some possible factors are analyzed which may bring stress concentration and bend fatigue load on the piston-rod. Microcosmic characters of fracture section show that the failure of piston-rod belongs to high circle fatigue fracture and the crack source region is almost consistent with position attained from the simulation analyzing, which proves that the analyzing method mentioned in this article is feasible and effective.
Fracture Reason Analyzing Telescopic Hydraulic Damper Piston-Rod Virtual Prototyping Technology
MA Weibiao WANG Hongyan WANG Liangxi
Mechanical and Engineering Department, Academy of Armored Force Engineering, Beijing, China, 100072
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
3400-3403
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）