南京理工大学学报（自然科学版）2017，Vol.41Issue(5)：556-561,6.DOI:10.14177/j.cnki.32-1397n.2017.41.05.003
钢结构疲劳裂纹合理止裂孔形状研究
Study on reasonable stop-hole shape for fatigue crack in steel structure
摘要
Abstract
In order to improve the effectiveness of the fatigue crack stop-hole for steel structure,the crack-stopping performance of different stop-hole shapes is analyzed. Based on the two dimensional finite-element model,the laws of stress distribution and the effects of stress concentration at the edge of stop-holes are compared for different stop-hole shapes. A lumbar round ( LR ) shape stop-hole ( similar to the lane shape ) combined with straight line and circle curve is proposed. The crack-stopping effectiveness of the LR stop-hole is further analyzed based on the drilling parameters,and a design method for the LR stop-hole is then established. The results indicate that the stress concentration decreases further when increasing the size of the LR stop-hole or decreasing its radius. And the stress performance of the LR stop-hole can be improved when applying the spiral transition curve at the position of the abrupt curvature,resulting in better crack-stopping effectiveness.关键词
钢结构/疲劳裂纹/止裂孔/应力集中/腰圆形Key words
steel structures/fatigue cracks/stop-holes/stress concentration/lumbar round shapes分类
数理科学引用本文复制引用
袁周致远,吉伯海,傅中秋..钢结构疲劳裂纹合理止裂孔形状研究[J].南京理工大学学报（自然科学版）,2017,41(5):556-561,6.基金项目
国家自然科学基金(51478163) （51478163）
江苏省交通科学研究计划项目(2013Y10-1) （2013Y10-1）
