Optimizing Winding Angles of Reinforced Thermoplastic Pipes Based on Progressive Failure Criterion

• 作者: WANG Yangyang LOU Min ZENG Xin DONG Wenyi WANG Sen
• 来源期刊: 中国海洋大学学报（自然科学英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: Marine and Atmospheric Sciences
• 页码范围: 1067-1078
• 页数: 12页
• 语种: 英文

摘要

This paper examines a scheme to optimize the multiple winding angles of reinforced thermoplastic pipes (RTPs) un-der internal and external pressures.To consider the nonlinear mechanical behavior of the material under changes of winding angle due to deformation,we use three-dimensional (3D) thick-walled cylinder theory with the 3D Hashin failure criterion and theory of the evolution of damage to composite materials,to formulate a model that analyzes the progressive failure of RTPs.The accuracy of the model was verified by experiments.A model to optimize the multiple winding angles of the RTPs was then established using the model for progressive failure analysis and a multi-island genetic algorithm.The optimal scheme for winding angles of RTPs capable of withstanding the maximum internal/external pressure was obtained.The simulation results showed that the ply number of the reinforced layer has a prominent nonlinear effect on the internal and external pressure capacity of the RTPs.Compared with RTPs with a single angle of ±55°,the multiple winding angle overlay scheme based on the multi-angle optimization model im-proved the internal and external pressure capacity of the RTPs,and the improvement in the external pressure capacity was signifi-cantly better than the internal pressure carrying capacity.