内压荷载下钢带缠绕增强复合管力学性能研究

摘要

Based on the three-dimensional elasticity theory,the mechanical properties of steel strip rein-forced thermoplastic(PSP)pipe under internal pressure was presented.The PSP pipe consists of four lay-ers.Mises yield criterion is introduced to predict the damage of the pipe on layer 2.Further a 3D finite el-ement model (FE model)is established in ABAQUS to compare with the theoretical model and the result shows good agreement with each other in terms of hoop stress and axial stress,which means the proposed elastic model is feasible and can be applied and updated to study the elasto-plastic properties of steel strip reinforced PSP pipe in future research,and serve as a guide to the forthcoming experiments.%以三维弹性力学理论为基础，研究了钢带缠绕增强复合管（PSP）在内压荷载下的力学性能。钢带缠绕增强复合管主要包括3层结构：内层 PE 层，中间两层钢带增强层以及外层 PE 增强层。在研究过程中主要分析了第一层钢带（层2）的应力分布，并以 Mises 屈服准则预测了钢带的极限强度。之后在 ABAQUS 中建立了钢带 PSP 管的三维模型，并将其结果与理论模型进行对比，结果显示，有限元模型中环向应力与轴向应力的变化与理论模型很符合。