摘要
通过橡胶纯剪试样疲劳裂纹扩展试验,得出了裂纹扩展速率与撕裂能之间的关系;以单位撕裂能范围为损伤参量,建立了复杂应力状态下的橡胶疲劳裂纹扩展寿命预测模型。基于ABAQUS有限元结构分析和橡胶材料等效应力计算方法,得出橡胶球铰在疲劳载荷下的单位撕裂能范围;对橡胶球铰的疲劳裂纹扩展寿命进行分析预测,并通过产品台架疲劳实验进行验证,结果表明橡胶球铰经过200万次疲劳试验后无明显裂纹,没有发现失效破坏,与寿命预测值基本吻合。
Through the fatigue crack growth tests of pure shear rubber specimens, obtained the relationship between the fatigue crack growth rate and the strain energy release rate, and with energy release rate range as damage parameters, built a fatigue crack growth life prediction model of rubber under multiaxial stress state. Based on the finite element analysis software ABAQUS and the corresponding equivalent stress method, obtained the energy release rate range of rubber bushing under fatigue loadings. Predicted the fatigue crack growth life of rubber bushing and verified through fatigue bench test. The results indicate that there is no failure and damage occurring to the rubber bushing after 2 million cycles of fatigue test, and it is coincident with the oredicted value.
出处
《湖南工业大学学报》
2013年第2期48-53,共6页
Journal of Hunan University of Technology
基金
湖南省教育厅重点科研基金资助项目(08A014)
湖南省十二五机械工程重点学科基金资助项目(湘教发[2011]76号)
关键词
橡胶球铰
裂纹扩展
撕裂能
疲劳寿命
rubber bushing
crack growth
energy release rate
fatigue life
