内压作用下玻纤增强柔性管损伤失效预测  

FAILURE PRIDICTION OF GLASS FIBER-REINFORCED FLEXIBLE PIPES UNDER INTERNAL PRESSURE

作　　者：张亚 王阳阳[1,2] 李昌良 娄敏[1,2] ZHANG Ya;WANG Yang-yang;LI Chang-liang;LOU Min(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Key Laboratory of Unconventional Oil&Gas Development,China University of Petroleum(East China),Qingdao,Shandong 266580,China)

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油大学(华东)非常规油气开发教育部重点实验室,山东青岛266580

出　　处：《工程力学》2023年第9期238-246,共9页Engineering Mechanics

基　　金：NSFC-山东联合基金重点支持项目(U2006226)。

摘　　要：为深入探讨内压工况下玻纤增强柔性管的损伤失效机理,该文采用三维弹性力学理论,对柔性管三维本构关系开展理论分析,通过结合三维Hashin-Yeh失效准则与非线性刚度退化模型,建立了考虑基体材料非线性力学行为的柔性管三维渐进失效模型。采用静水压爆破实验对理论模型进行验证,在此基础上进行缠绕角度及径厚比等参数敏感性分析。理论模型与实验结果对比较为吻合;缠绕角度对柔性管在内压工况下的应力分布有较为明显的影响,随着缠绕角度的增加柔性管的首层失效荷载与最终爆破荷载均呈现增长趋势;随着径厚比的增加,柔性管承压能力迅速降低,但失效模式并未发生改变。In order to explore the damage failure mechanism of glass fiber-reinforced flexible pipes under internal pressure,the theory of three-dimensional(3D)elasticity is adopted to carry out the theoretical analysis on 3D constitutive relationship of a flexible tube.Combined with a 3D Hashin-Yeh failure criterion and a nonlinear stiffness degradation model,considering the nonlinear mechanical behavior of matrix materials,a 3D progressive failure model of the flexible tube is established.The hydrostatic burst experiments are used to verify the theoretical model.And on this basis,the influence of winding angle and diameter thickness ratio on the failure load and failure mode of the flexible tube is analyzed.The analysis results show that:the theoretical model is in a good agreement with the experimental results.The winding angle has an obvious effect on the stress distribution of the flexible pipe under internal pressure;with the increase of the winding angle,the first layer failure load and the final burst failure load of the flexible pipe all present a tendency of increasing;with the increase of diameter thickness ratio,the pressure capacity of the flexible pipe decreases rapidly,but the failure mode does not change.

关 键 词：内压 本构关系 渐进失效模型 失效模式 缠绕角度 径厚比 承压能力 

分 类 号：O346.5[理学—固体力学]