修补切口应力强度因子边界元法研究

Analysis of stress intensity factors of repaired notch components by boundary element method

切口尖端的应力奇异性严重影响了含切口构件的使用安全,采用粘贴材料修补切口后必须对修补效果进行评估。文章利用边界元法对修补切口构件进行数值模拟,运用应力法计算切口尖端的应力强度因子,分析了修补材料的弹性模量、厚度等参数对切口应力强度因子的影响,评估了含切口构件修补后的效果。

The stress singularity at the notch tip has seriously threatened the safety of notch components.After pasting aplate to repair a notch component,the repairing effect should be studied and estimated.Herein,the boundary element method(BEM)is applied to modeling the repaired notch component.The stress method is then adopted to calculate the stress intensity factor of the V-notch.The effect of elasticity modulus and thickness of the repairing material on the stress intensity factor of the repaired V-notch is investigated.The repairing effect of the notch component is estimated.