摘要
作为评估管裂纹断裂韧性的重要参量,应力强度因子的确定尤为重要。为了更好地解决工程实际问题,大多数为三维裂纹问题,采用基于虚功原理和弯曲理论的裂纹张开能量释放率,即G*积分理论来求解带边界平椭圆截面管裂纹问题,得到拉伸载荷作用下平椭圆形截面管裂纹应力强度因子的G*积分表达式。给出的方法计算简单,能够得到封闭解。
As an important parameter to assess the crack pipe fracture toughness, stress intensity factor determined is particularly important. In order to solve practical engineering problems, most of them are three-dimensional crack problems, crack mouth widening energy release rate based on the principle of virtual work and bending theory, i.e. G ＊ integral theory is proposed to solve the problem of flat-elliptic cross section cracked pipe with boundary, and the stress intensity factors which are related to G＊ integral are given under tensile load for flat-elliptic cross-section tube crack. The results show application of this method is simple, and closed-form solution can be obtained.
出处
《机械强度》
CAS
CSCD
北大核心
2017年第2期423-427,共5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
平椭圆形截面管
G＊积分
应力强度因子
Fracture mechanics
Flat-elliptic cross section pipe
G＊ integral
Stress intensity factor
