摘要
为探讨外压工况下玻纤增强柔性管的应力应变关系,本文建立了外压工况下的玻纤增强柔性管本构模型。根据轴对称载荷下的管道位移场函数,基于三维缠绕厚壁圆筒原理,考虑了热塑性材料非线性,并且引入了玻纤增强柔性管变形引起的缠绕角度变化。将数值模拟计算结果与有限元模型结果进行了对比分析,在此基础上分析了缠绕角度和缠绕层数对玻纤增强柔性管力学性能的影响。结果表明:有限元计算结果与数值模拟结果吻合较好,增强层作为承压层应力值(纤维纵向应力、垂直于纤维方向的横向应力、纤维/基体剪切应力)最大。缠绕角度对不同方向上的承压能力影响不同,随着缠绕角增加可以更好地发挥纤维的承载能力。缠绕层数的增加,玻纤增强柔性管各方向承压能力呈现非线性增长。
To explore the stress-strain relationship of reinforced glass fiber flexible pipes under external pressure, a constitutive model of reinforced glass fiber flexible pipes under external pressure is established in this study. According to the theory on three-dimensional(3-D) thick-walled cylinders and the pipeline displacement field function under axisymmetric loads, the nonlinear mechanical behaviors of thermoplastic materials are considered, and the changes in the winding angle caused by deformation are introduced. The results of the numerical simulation are compared with those of the finite element model. On this basis, the effects of the winding angle and winding layer on the mechanical properties of reinforced glass fiber flexible pipes are analyzed. The results show that the finite element model results can match well with the numerical simulation results. The stress value of the reinforced layer as the bearing layer(longitudinal stress, transverse stress perpendicular to the fiber, and fiber/matrix shear stress) is the largest. The winding angle has different effects on the pressure-bearing capacity in different directions, and the fiber bearing capacity can be better exerted when the winding angle increases. With the increase in the winding layer, the pressure-bearing capacity of reinforced glass fiber flexible pipes nonlinearly increases in all directions.
作者
王阳阳
娄敏
吴武刚
王晓凯
WANG Yangyang;LOU Min;WU Wugang;WANG Xiaokai(School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,China;Key Laboratory of Unconventional Oil&Gas Development,China University of Petroleum(East China),Ministry of Education,Qingdao 266580,China;Kunming Shipborne Equipment Research and Test Center,China Shipbuilding Industry Corporation,Kunming 650051,China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2021年第11期1663-1670,共8页
Journal of Harbin Engineering University
基金
国家重点研发计划(2016YFC0303800)
国家自然科学基金项目(51579245)。
关键词
外压
本构模型
轴对称荷载
厚壁圆筒理论
材料非线性
缠绕角度
缠绕层数
承压能力
external pressure
constitutive model
axisymmetric load
thick-walled cylinder theory
material nonlinearity
winding angle
winding layer
pressure-bearing capacity
