Numerical analysis of stress concentration factors on tensile armour wires inside the end-fitting of an axially tensed unbonded flexible pipe

IF 3 Q2 ENGINEERING, CIVIL
Panagiotis Anastasiadis, E. Theotokoglou, C. Michailides
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引用次数: 2

Abstract

ABSTRACT The present paper examines the case of a metal based unbonded flexible pipe under a number of axial tensile operational loads of varying intensity, expressly focusing on the response of the segments of the pipe’s tensile armour wires that lie inside the pipe’s End-Fitting (EF), with intent to track the development of high stress concentration areas there and assess the stress concentration factors (SCF) involved. Additionally, a parametric study is performed, to identify potential factors that might affect the maximum SCF values measured on these wire segments inside the EF. Based on the parametric study’s findings, an approximate relationship for evaluating the expected maximum SCF on the tensile wire inside the EF is developed. The paper adopts a numerical approach to the problem, based on the development of a two-dimensional finite element model for evaluating the wire’s response to axial tensile operational loads. The model considers both the effects the EF’s assembling procedure and the Factory Acceptance Test (FAT) have on the behavior of wire segments lying inside the EF. An analytical approach is employed as a benchmarking tool of the numerical model’s performance.
轴向张拉无粘结柔性管端管件内拉伸护丝应力集中系数的数值分析
摘要本文研究了金属基无粘结软管在多种不同强度的轴向拉伸操作载荷下的情况,特别关注位于管道端部配件(EF)内的管道抗拉铠装线段的响应,目的是跟踪那里高应力集中区域的发展并评估所涉及的应力集中因子(SCF)。此外,还进行了参数研究,以确定可能影响EF内这些线束段上测量的最大SCF值的潜在因素。基于参数研究的结果,建立了用于评估EF内张力钢丝的预期最大SCF的近似关系。本文在建立二维有限元模型的基础上,采用数值方法来评估钢丝对轴向拉伸操作载荷的响应。该模型考虑了EF的组装程序和工厂验收测试(FAT)对EF内部线束段行为的影响。采用分析方法作为数值模型性能的基准工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.90
自引率
9.50%
发文量
24
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