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将钢丝缠绕增强塑料复合管(PSP管)简化为内层、复合层、外层三层结构组成的力学模型,其中复合层由内外两层单层板组成。采用串并联模型确定单层板弹性参数,通过正交各向异性材料三维弹性理论推导出各层界面上接触压力与轴向力的方程组,进而得到PSP管各层在内压、外压和轴向力联合作用下的应力及应变计算公式。实验结果表明：随着内压载荷的增加,PSP管环向应变与轴向应变均呈上升趋势,理论值与实验结果较为一致,所建模型可用于预测PSP管应力和应变。
The wire-wound reinforced plastic composite pipe (PSP pipe) is simplified into a mechanical model composed of three layers of inner layer, composite layer and outer layer, wherein the composite layer is composed of two layers of single-layer plates inside and outside. The series-parallel model was used to determine the elastic parameters of the single-layer slab, and the equations of contact pressure and axial force at each layer interface were deduced from the three-dimensional elastic theory of orthotropic materials. Calculation formula of stress and strain under combined action of axial force. The experimental results show that with the increase of internal pressure load, both the circumferential strain and the axial strain of PSP pipe tend to increase. The theoretical values agree well with the experimental results. The model can be used to predict the stress and strain of PSP pipe.