摘要
通过楔子横向加载，用ＣＣＡ试样研究了油气输送管的止裂韧性。显然止裂韧性是一顶重要的材料参数。试验结果表明，止裂韧性Ｋａ与夏比冲击吸收能ＣＶＮ之间存在如下关系：Ｋａ＝０．０１０３ＣＶＮ２＋１．２７０３ＣＶＮ＋１４．１４６。裂纹扩展长度取决于应力场强度因子的变化：Ｋ０－Ｋａ＝２５７１．９ａ－１０４．１４。
Abstract In this paper the crack arrest toughness of oil and gas line pipe material is studied by forcing a wedge into a split pin on CCA(compact crack arrest) specimen. The results show that crack arrest toughness is an important parameter of material. The experimentally obtained relation between the crack arrest toughness K a and Charpy impact energy CVN is K a=0.0103 CVN 2+1.2703 CVN +14.146. The length of crack propagation is depended on the change of stress intensity factor: K 0- K a=2571.9a-104.14.
出处
《机械工程材料》
CAS
CSCD
北大核心
1999年第1期20-22,共3页
Materials For Mechanical Engineering
