摘要
通过实验研究了柱面-平面桥式接触模型的微动作用对疲劳断裂裂纹的影响。采用ANSYS建立了微动疲劳有限元模型,对该模型三步加载,在法向载荷和轴向载荷的作用下,计算分析了接触区域的应力场和应力幅,结果表明在微动接触区域存在应力集中,最大应力幅位置位于接触区域靠外侧处,依据应力幅得出该位置易于萌生裂纹并扩展断裂的结论,与实验结果对比,微动疲劳断裂裂纹位置较一致。
The influence of fretting on fatigue fracture cracks was investigated by using a cylinder-plane contact model. A finite element fretting fatigue model was established by ANSYS. The stress intensity and stress intensity amplitude on contact surface have been calculated and analyzed under the action of normal load and axial load. The results showed that there existed stress concentration in the contact surface region,and the maximum amplitude of stress intensity was located outside the contact surface region. This was close to the fracture crack location of fretting fatigue from the experimental results.
出处
《化肥设计》
CAS
2015年第4期4-7,共4页
Chemical Fertilizer Design
关键词
微动疲劳
有限元分析
应力幅
断裂裂纹位置
fretting fatigue
finite element analysis
stress amplitude
crack position
