轴向压缩荷载作用下纤维增强柔性管渐进失效研究  

Study on the progressive failure of reinforced thermoplastic pipes(RTPs)under axial compression

作　　者：卜嘉润 刘文成 王树青[1,2] 丁新东 BU Jiarun;LIU Wencheng;WANG Shuqing;DING Xindong(College of Engineering,Ocean University of China,Qingdao 266100,China;Shandong Provincial Key Laboratory of Ocean Engineering,Qingdao 266100,China)

机构地区：[1]中国海洋大学工程学院,青岛266100 [2]山东省海洋工程重点实验室,青岛266100

出　　处：《复合材料科学与工程》2023年第7期57-64,90,共9页Composites Science and Engineering

基　　金：国家杰出青年科学基金(51625902);工信部海洋工程用玻纤增强柔性管研制与应用示范项目;山东省泰山学者工程计划(TS201511016)。

摘　　要：以一种黏结型的纤维增强柔性管为研究对象,基于ABAQUS/Explicit建立纤维增强柔性管的实体单元模型,根据Hashin-Yeh失效判据判断柔性管模型失效情况,使用了嵌套非线性刚度退化模型的VUMAT子程序,发展了轴向压缩下纤维增强柔性管的渐进失效模型,具有准确判断柔性管在压缩工况下失效模式、位置的功能。通过压缩实验验证了有限元模型,数值模拟与实验得到的力与位移关系吻合较好。在此基础上进一步分析了压缩工况下,柔性管各失效模式的演化过程。研究结果表明:压缩工况下,纤维增强柔性管失效的主要模式为基体压缩及纤维压缩失效,且各失效模式出现于管道的不同位置。柔性管纤维缠绕角度大于30°时,主要的失效模式由纤维压缩失效变为基体压缩失效。In the present paper,the numerical model of reinforced thermoplastic pipe based on ABAQUS/Explicit is established,in which the failure mode of composite laminates is determined according to Hashin-Yeh failure criterion,and a VUMAT subroutine based on a nonlinear stiffness degradation model is used to predict the progressive failure process.The progressive failure prediction method could accurately determine the failure mode and position under axial compression conditions.The progressive failure prediction method was verified by a compression experiment,and the relationship between force and displacement obtained by the numerical simulation and the experiment agreed well.Besides,the progressive failure of different failure modes of reinforced thermoplastic pipe under axial compression conditions was analyzed.The results showed that the main failure modes of reinforced thermoplastic pipes are matrix compression failure mode and fiber compression failure mode.The axial elastic stiffness of the pipe decreases with the increase of fiber’s winding angles,and each failure mode appears in different position of pipe.When the fiber’s winding angles is greater than 30°,the dominant failure mode changes from fiber compression failure mode to matrix compression failure mode.

关 键 词：纤维增强柔性管 轴向应力 Hashin-Yeh失效判据 刚度退化 渐进失效 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]