Mechanical Properties Study of Reinforced Thermoplastic Pipes Under A Tensile Load

作者：WANG Yang-yang,LOU Min,TONG Bing,WANG Sen

摘要：This paper presents a study on the tensile properties of reinforced thermoplastic pipes(RTPs). A mechanical model of RTPs with an arbitrary number of reinforced layers under tensile action is constructed by combining the constitutive relationship of elastoplastic materials with the continuous displacement condition. On this basis, the effects of various parameters such as the winding angle, the number of structurally reinforced layers, and the inner polyethylene(PE) liner thickness on the tensile properties of the RTPs were analyzed, and a tensile test was carried out for validation. The results showed that the winding angle of the structurally reinforced layers was the main factor affecting an RTP's tensile performance— decreases in the winding angle significantly improved its tensile ability,especially the longitudinal strength. With ±45° as the demarcation point, the winding angle smaller than ±45° will result in higher strength in longitudinal direction, and the lifting effect on RTP's mechanical properties of the increasing number of reinforcement layers was better than that of the increasing thickness of the lining layer;when the winding angle was larger than ±45°, the opposite results were obtained. The fibre load was more sensitive to the winding angle than the PE load.

发文机构：School of Petroleum Engineering Key Laboratory of Unconventional Oil&Gas Development（China University of Petroleum（East China）） Hoisting Machinery Business Division Weihai Nacheon Pipeline Co.

关键词：reinforcedthermoplasticpipestensilepropertieswindinganglePOLYETHYLENE

分类号： TG1[金属学及工艺—金属学]