Fiber-reinforced flexible pipes are widely used to transport the fluid at locations requiring flexible connection in pipeline systems. It is important to predict the burst pressure to guarantee the reliability of the flexible pipes. Based on the composite shell theory and the transfer-matrix method, the burst pressure of flexible pipes with arbitrary generatrix under internal pressure is investigated. Firstly, a novel method is proposed to simplify the theoretical derivation of the transfer matrix by solving symbolic linear equations. The method is accurate and much faster than the manual derivation of the transfer matrix. The anisotropy dependency on the circumferential radius of the pipe is considered in the theoretical approach, along with the nonlinear stretch of the unidirectional fabric in the reinforced layer. Secondly, the burst pressure is predicted with the Tsai-Hill failure criterion and verified by burst tests of six different prototypes of the flexible pipe. It is found that the burst pressure is increased significantly with an optimal winding angle of the unidirectional fabric. The optimal result is determined by the geometric parameters of the pipe. The investigation method and results presented in this paper will guide the design and optimization of novel fiber-reinforced flexible pipes.

纤维增强挠性管被广泛用于在管道系统中需要挠性连接的位置输送流体。预测爆破压力以确保挠性管的可靠性很重要。基于复合壳理论和传递矩阵法，研究了任意母管挠性管在内部压力下的爆破压力。首先，提出了一种新的方法，通过求解符号线性方程，简化了传递矩阵的理论推导。该方法是准确的，并且比手动导出传递矩阵要快得多。在理论方法中，考虑了各向异性对管道圆周半径的依赖性以及增强层中单向织物的非线性拉伸。其次，爆裂压力通过Tsai-Hill破坏准则进行预测，并通过六种不同型号的挠性管的爆破试验进行验证。已经发现，在单向织物的最佳缠绕角度下，爆裂压力显着增加。最佳结果取决于管道的几何参数。本文提出的研究方法和结果将指导新型纤维增强挠性管的设计和优化。