燕山大学学报2012，Vol.36Issue(4)：293-297,5.DOI:10.3969/j.issn.1007-791X.2012.04.002
微孔洞在材料表面的深度变化对应力集中及疲劳裂纹萌生的影响规律研究
Effect of pore position in depth on stress concentration around pore on sample surface
摘要
Abstract
Stress field around a pore is analyzed as a function of the pore position in depth in the surface of a linear elastic solid using FEM. It is found that the pore size only affected the size of the stress concentration region and the magnitude of the maximal stress concentration ratio around the pore only depended on the relative depth of the pore. The maximum of the maximal stress concentration ratio appeared when the pore intercepted with the surface at its top and the maximal stress concentration ratio decreased sharply when the pore diverges from the tangency position. These results are consistent with experimental observations that the fatigue crack initiation starts at the pore which intercepted with the surface at its top, especially is just buried underneath the surface.关键词
微孔洞/应力集中/FEM/裂纹萌生/疲劳Key words
pore/stress concentration/FEM/crack initiation/fatigue分类
数理科学引用本文复制引用
许志强,臧新良,文伟,翟同广..微孔洞在材料表面的深度变化对应力集中及疲劳裂纹萌生的影响规律研究[J].燕山大学学报,2012,36(4):293-297,5.基金项目
国家自然科学基金资助项目(50675187) （50675187）
河北省人力资源和社会保障厅人才工程项目资助 （）
