摘要
应力强度因子的确定是断裂力学在实际工程应用的首要任务。分别根据虚功原理和材料力学弯曲理论的裂纹面非自发扩展能量释放率,即J_2积分理论求解D型截面管的在拉伸和弯曲载荷作用下的裂纹应力强度因子表达式。给出的方法能得到封闭解,且计算简单。并将结果与有限元解进行分析比较,进一步指出了计算方法的有效性。
The nuclear task in fracture mechanics is to determine the stress intensity factor.According to the crack mouth widening energy release rate based on the principle of virtual work and bending theory,respectively,i.e.J2 integral theory is proposed to solve the stress intensity factor expression of D-shape cross section cracked pipe under tension and bending loads. The results show application of this method not only can give closed-form solution ,but also extremely simple.Comparing the proposed method with the finite element method to show the feasibility of the proposed method.
作者
袁浩
谢禹钧
YUAN Hao;XIE YuJun(College of Mechanical Engineering,Liaoning University of Petroleum and Chemical Technology,Fushun 113001,China)
出处
《机械强度》
CAS
CSCD
北大核心
2018年第6期1473-1478,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(50771052
50971068
11272141)资助~~
关键词
断裂力学
应力强度因子
D型截面管
裂纹
有限元
Fracture mechanics
Stress intensity factor
D-shape cross section cracked pipe
Crack
Finite element method
