HTS-A钢对接接头的双轴疲劳试验研究  

Experimental Study on Biaxial Fatigue at Butt Joint of HTS-A Steel

作　　者：严仁军[1] 周宏飞[1] 李双印[1] 张新宇[2] 耿黎明[2] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中国舰船研究设计中心,武汉430064

出　　处：《中国造船》2011年第2期55-62,共8页Shipbuilding of China

摘　　要：开展了HTS-A钢对接焊接试件的双轴疲劳试验。通过一组试件在纵向受弯和垂向受压循环载荷作用下的试验研究,得到了不同双轴载荷比情况下的试件断口形式及疲劳寿命。根据试验过程中记录的裂纹扩展数据,回归了不同载荷比情况下的Paris公式,从而推算裂纹扩展寿命。进而通过总寿命减去裂纹扩展寿命得到裂纹的萌生寿命。结果表明,垂向循环压力载荷缩短了试件的疲劳寿命,且对萌生寿命的影响大于对扩展寿命的影响。Biaxial fatigue test on HTS-A steel welding specimens is conducted, on which both longitudinal bending cyclic load and vertical compressing cyclic load are applied. Through the experimental studies, the fracture form and fatigue life of test specimens is obtained with different biaxial load ratios. The crack-propagation life is calculated according to the regression of Paris formula based on the crack propagation record. Subtraction of the total life from the crack-propagation life is defined as the engineering crack-initiation life. It is shown that the vertical compressive cyclic load has a negative effect on the test specimen＇s fatigue life. Besides, the vertical compressive cyclic load has greater influence on crack-initiation life than the crack-growth life.

关 键 词：双轴疲劳 萌生寿命 扩展寿命 低周疲劳 对接接头 

分 类 号：U661.43[交通运输工程—船舶及航道工程]