Ⅱ型加载条件下复合材料与管线钢共固化界面有效搭接长度试验  

Experimental Study on Effective Lap Length of Composite-Pipeline Steel Co-Curing Interface under Ⅱ Type Loading

作　　者：吕志伟 王言聿[1] 张保龙 彭强 成志强[1] LYU Zhiwei;WANG Yanyu;ZHANG Baolong;PENG Qiang;CHENG Zhiqiang(School of Mechanics and Engineering,Southwest Jiaotong University,Chengdu 610031,China;Sichuan Deyuan Oil and Gas Engineering Corporation,Chengdu 610041,China)

机构地区：[1]西南交通大学力学与工程学院,四川成都610031 [2]四川德源石油天然气工程有限公司,四川成都610041

出　　处：《成都大学学报（自然科学版）》2020年第1期89-93,共5页Journal of Chengdu University（Natural Science Edition）

基　　金：教育部高等学校博士学科点专项科研基金(20110184110017)资助项目。

摘　　要：为了确定复合材料与管线钢共固化胶结界面受剪时的有效搭接长度,设计了双搭接胶结试件拉伸试验.对界面在Ⅱ型加载条件下的失效扩展过程进行了试验研究和有限元模拟.试验结果表明,界面的破坏形式为脱粘失效.试验得到了复合材料表面沿拉伸方向上的应变分布规律,胶结界面剪切应力与滑移量之间的关系(Bond-Slip曲线),计算可得Ⅱ型加载条件下复合材料与管线钢胶结界面的临界能量释放率为1062 N/m,界面的有效搭接长度约为15.5 mm.将临界能量释放率应用到有限元模拟的界面本构,模拟得到的复合材料沿拉伸方向的应变分布规律与试验结果对比较好.有限元分析结果表明,裂纹沿着胶结界面由两侧向中间位置逐渐发生与扩展.In order to determine the effective lap length of the composite-pipeline steel co-curing bonding interface in shear,a double lap bond specimen tensile test is designed. The failure propagation process of the interface under Ⅱ-type loading is studied by experimental study and finite element modelling. The test results show that the failure mode of interface is debonding failure. The strain distribution on the surface of the composite along the tensile direction and the relationship between the shear stress and the slip( Bond-slip curve) are obtained. The critical energy release rate of the bonding interface between composite and pipeline steel under Ⅱ-type loading is calculated,1 062 N/m,and the effective lap length of the interface is about 15. 5 mm. The critical energy release rate is applied to the finite element simulation,and the strain distribution along the tensile direction of the simulated composite is in good agreement with the experimental results. The results of finite element analysis show that the crack propagates from two sides to the middle along the cementation interface.

关 键 词：复合材料与管线钢胶结界面 Ⅱ型加载 有效搭接长度 界面裂纹扩展 

分 类 号：TB33[一般工业技术—材料科学与工程] TE973[石油与天然气工程—石油机械设备]