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Analysis of Reinforced Thermoplastic Pipe (RTP) under Axial Loads

机译:轴向载荷下的热塑性塑料管(RTP)分析

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Reinforced thermoplastic pipe (RTP) is an innovative application in the oil & gas industry. The mechanical property of RTP under axial loads is a significant parameter for the popularization of RTP. This paper focuses on the experimental and numerical research on the behavior of RTP under axial loads. First, prototype tests, including axial tensile tests and compressive tests, are conducted; and then, a nonlinear finite element model employing solid elements and truss elements is created. In this ABAQUS model, the material nonlinearity is taken into account. The prototype tests reveal the fundamental mechanical properties of RTP under axial loads. The numerical models are validated against the generated experimental data, including load-extension relationship, load-shortening relationship, yielding load under tension, collapse load under compression, and failure mode. Close agreement can be found between the numerical results and the experimental results, so the finite element model in this paper can be regarded as feasible to analyze the mechanical properties of RPT and similar structures.
机译:增强热塑性塑料管(RTP)是石油和天然气行业中的一项创新应用。 RTP在轴向载荷下的力学性能是RTP推广的重要参数。本文重点研究了RTP在轴向载荷下的行为的实验和数值研究。首先,进行原型测试,包括轴向拉伸测试和压缩测试。然后,建立了使用实体单元和桁架单元的非线性有限元模型。在此ABAQUS模型中,考虑了材料非线性。原型测试揭示了RTP在轴向载荷下的基本机械性能。根据生成的实验数据验证了数值模型,包括载荷-拉伸关系,载荷-缩短关系,拉伸下的屈服载荷,压缩下的塌陷载荷以及破坏模式。数值结果与实验结果吻合得很好,因此本文的有限元模型可以认为是分析RPT及类似结构的力学性能的可行方法。

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