紧凑拉伸试验CTOD双引伸计测试方法研究  

INVESTIGATION ON DOUBLE-CLIP-GAUGE METHOD TESTING CTOD FOR COMPACT TENSION SPE CIMEN

作　　者：杨光[1] 薛钢[1,2] 王任甫[1] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,洛阳471039 [2]哈尔滨工业大学先进焊接与连接国家重点实验室,哈尔滨150001

出　　处：《机械强度》2013年第2期163-167,共5页Journal of Mechanical Strength

摘　　要：以船用A36钢板为试验材料,开展紧凑拉伸试验裂纹尖端张开位移δ(crack tip opening displacement,CTOD)的双引伸计测试方法研究。结果显示,采用双引伸计方法可直接测定旋转因子r及δ,计算得到名义应力σ与裂纹尖端张开位移塑性分量δp(plastic component of CTOD)的相关性曲线。与国标GB/T 21143—2007测试方法相比,双引伸计法对δp的测试精度更高;与EPRI(Electronic Power Research Institute)计算方法相比,双引伸计法对σ—δp关系曲线的确定更为直接可靠。Double-clip-gauge method testing crack tip opening displacement （CTOD） of compact tension was studied with the material of steel A36. The results show that for a given crack length the correlation curves between nominal stress （tr） and the plastic component of CTOD （Sp） and the rotational factor r can be tested directly. The 8 for a given crack length is more accurate tested by the double-clip-gauge method than it by the GB/T 721143-2007 method. Compare with EPRI （Electronic Power Research Institute） method, σ-δp curve determined by double-clip-gauge method is more reliable and it can be obtained easily.

关 键 词：紧凑拉伸 双引伸计 裂纹尖端张开位移 旋转因子 σ—δp曲线 

分 类 号：O346.12[理学—固体力学] TG115.57[理学—力学]