含缺陷管件的抗弯曲特性  

Bending Resistance of Pipes with Local Defects

作　　者：林冠发[1] 李金波[1] 仝明信[1] 郑茂盛[1] 白真权[1] 

机构地区：[1]西安交通大学材料科学与工程学院

出　　处：《钢铁》2005年第12期41-45,共5页Iron and Steel

基　　金：国家重点基础研究发展规划项目(G1999065004);国家自然科学基金资助项目(50231020);中国石油天然气集团公司管材研究所石油管力学与环境行为重点实验室开放基金(ZYT-01070)

摘　　要：评定含缺陷管抗弯曲特性的NSC方法(net-section collapse criterion),所给出的极限弯矩与缺陷长度无关,与实际不符。修正的NSC方法,得到了包含缺陷长度的缺陷管极限弯矩新计算公式。试验结果表明,在缺陷较小的情况下,试验结果与新公式预测值接近而与NSC方法预测值相差较大;在缺陷较大时,三者趋于一致。In NSC （net-section collapse criterion）, the length of defects is ignored for assessing the bending resistance of pipes with local defects. To modify NSC, a new formula of ultimate bending moment with consideration of defect length was established, J55 oil well pipes with prefabricated local defects were employed to verify the validity of the new formula. The results show that for shorter local defects, the test data agrees with calculated ones predicted by new formula and are different from those predicted by NSC, for longer local defects, three kinds of values are consistent.

关 键 词：弯曲 缺陷长度 对称加载 改进NSC 

分 类 号：TG115.54[金属学及工艺—物理冶金]