压力容器2013，Vol.30Issue(3)：57-62,6.DOI:10.3969/j.issn.1001-4837.2013.03.010
含均布多轴向表面裂纹厚壁圆筒结构安全性评价
Safety Assessment of Thick Walled Cylinders with Multiple Axial Surface Cracks
摘要
Abstract
The influences of multiple axial surface cracks on the safety of thick walled cylinders are important. The varies of stress intensity factors of multiple axial surface cracks along with the numbers of the cracks in the cylinders were analyzed with finite element method. Maximum circular stress of the cylinders with multiple cracks and cylinders with the inner radial equal to the distance from crack tip to the center of the cylinders with cracks were also evaluated. The results reveal that the stress intensity factors of multiple cracks decreased with the increase of the cracks' number. The decrease of tress intensity factors just imply the propagate velocity decrease of the cracks. Also the maximum circular stress of cylinders with multiple cracks has the peak point when the crack number N = 2 and the intensity of the stress decrease with the increase of the cracks' number. But it always higher than the maximum circular stress of cylinders whose inner radial equal to the distance from crack tip to the center of the cylinders with cracks. The safety of cylinders with multiple cracks is lower than the equivalent ones without cracks.关键词
多轴向表面裂纹/应力强度因子/有限元法/最大周向应力Key words
multiple axial surface cracks/stress intensity factor/finite element method/maximum circular stress分类
机械制造引用本文复制引用
秦晓峰,谢里阳,何雪浤..含均布多轴向表面裂纹厚壁圆筒结构安全性评价[J].压力容器,2013,30(3):57-62,6.基金项目
国家高技术研究发展计划(863计划)项目(2012AA040104) （863计划）
