摘要
基于有限元软件ANSYS分析了厚壁圆筒的最佳自增强压力。计算了在相应工作压力下自增强圆筒内表面轴向裂纹Ι型应力强度因子。考虑了裂纹的几何形状、深度等影响因素,对圆筒内外两侧同时存在裂纹的情况进行了研究。结果表明:最佳自增强压力随工作压力而变化;自增强后应力强度因子的减少量随裂纹加深而降低;外部裂纹可使内裂纹应力强度因子降低1%左右。
This paper analyzed the optimum autofrettage pressure of a thick wall cylinder under the internal pressure and mode I stress intensity factor（SIF） for axial semi-elliptical cracks on the surface of the autofrettaged thick wall cylinder based on ANSYS. The SIF along the crack front are directly computed by 3D finite element method for a wide range of variations of the crack geometry.Also cracks on both surfaces of the autofrettaged thick wall cylinder were considered. The results show that the optimum autofrettage pressure of cylinder changes with the internal pressure,the SIF of the axial crack on the inner suface decrease after autofrettage,and the differences decrease while the crack depth increases,the axial crack outside the cylinder causes a decrease of about 1% of the SIF of the crack inside.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第6期46-49,57,共5页
Nuclear Power Engineering
