摘要
采用1/4节点奇异单元,建立了求解圆筒外表面轴向椭圆裂纹应力强度因子的断裂力学分析模型,分析了应力强度因子随圆筒外径与内径比k=ro/ri、椭圆率a/b及裂纹的相对深度a/t的变化规律,并结合VB编制出了求解圆筒外表面椭圆裂纹应力强度因子的自动分析软件。
A analytic model of fracture mechanics has been establishment to calculate the stress intensity factor of axial semielliptical outside surface cracks in a circular tube by using the methods of 1/4-displacement of the finite element; the varying regularity of SIF is studied as the ratio of the external diameter divide to the internal diameter k, ellipticity a/b and the law of change Of the relative depth a/t. And an automatic analysis program to calculate the stress intensity factor of the semi-elliptical surface crack is worked out, in combination with VB.
出处
《管道技术与设备》
CAS
2008年第2期18-20,共3页
Pipeline Technique and Equipment
关键词
圆管
1/4节点奇异单元
轴向半椭圆裂纹
有限元
VB
circular tube
1/4-displacement of finite element
axial semi-elliptical
finite element
VB
