Study on mechanical properties of continuous glass fiber reinforced thermoplastic composite pipe under pressure

doi:10.19936/j.cnki.2096-8000.20230728.011

Abstract

Abstract: The mechanical properties of continuous glass fiber reinforced thermoplastic composite pipe (RTP pipe) have an extremely important influence on engineering applications. Therefore, the finite element model of RTP pipe under internal pressure was established by using Halpin-Tsai combined model method. Based on the three-dimensional orthogonal anisotropic elastic theory, the maximum stress failure criterion is used to theoretically analyze and calculate the internal pressure burst value of composite pipe. Finally, the short-time burst pressure test of the compound pipe is carried out to verify the analysis. The results show that with the increase of the internal pressure load, the force on the reinforcement layer is much larger than that on the inner and outer layers, and the reinforcement layer plays an important role under the internal pressure. The average bursting pressure of real RTP pipe is 14.15 MPa, the value of finite element simulation analysis is 13.28 MPa, and the relative difference with the experimental results is 6.14%. The theoretical calculated value is 16.34 MPa, which is in good agreement with the experimental value. It has important guiding significance for the design and application of RTP pipeline.

Key words: composite pipe, finite element model, internal pressure, short burst pressure test

CLC Number:

TB332

WANG Qi, XIE Yufei, YUAN Lianzhong, GAO Jinke, LU Jiajun. Study on mechanical properties of continuous glass fiber reinforced thermoplastic composite pipe under pressure[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(7): 79-85.

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