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首页> 外文期刊>MATEC Web of Conferences >Modelling the performance of a corroded pipe section repaired with three-parts epoxy grout and with three-parts epoxy grout plus nanofiller
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Modelling the performance of a corroded pipe section repaired with three-parts epoxy grout and with three-parts epoxy grout plus nanofiller

机译：用三部分环氧灌浆和三部分环氧灌浆加纳米填料修复的腐蚀管段的性能建模

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摘要

Steel pipelines have been used for the transportation of oil and gas for more than a century. With exposure to the harsh condition of the environment, steel pipelines are subjected to corrosion that deteriorates their function through metal loss. To remedy this, several repair techniques have been developed to extend their service life, particularly, techniques that do not interrupt the flow of the oil and gas. There are three main components in a Fibre-reinforced Polymer (FRP) composite repair which are (1) FRP composite wrap, (2) infill material, and (3) interlayer adhesive. Past research had looked at enhancing the infill material, which is usually an epoxy grout, with the aim to reduce or remove the number of FRP composite wrap layers. One of the ways to enhance the infill material is to add Graphene Nanoplatelets (GNPs) to the epoxy grout. This was proven by carrying out different mechanical tests on a neat three-part epoxy (Infill A) and a three-part epoxy with 0.1% GNPs added by weight (Infill B). With the mechanical properties obtained for both infill materials, the pipe sections were then modelled with a finite element software to determine the repair performance without the use of FRP composite wrap. The difference of failure pressures between the pipe repaired using Infill A and Infill B over the unrepaired pipe were 2.7% and 4.2% respectively. The failure of the repair was due to the debonding of the infill materials from the pipe section. However, this research has provided significant information in understanding the properties of the infill materials as well as the numerical modelling on a repaired pipe section.
机译：钢制管道已经用于石油和天然气的运输已有一个多世纪了。由于暴露于恶劣的环境中，钢管遭受腐蚀，其腐蚀会由于金属损失而降低其功能。为了解决这个问题，已经开发了几种维修技术来延长其使用寿命，特别是不会中断油气流动的技术。纤维增强聚合物（FRP）复合材料修复中有三个主要成分，分别是（1）FRP复合材料包裹物，（2）填充材料和（3）层间粘合剂。过去的研究集中在增强填充材料（通常是环氧灌浆）上，目的是减少或去除FRP复合材料包裹层的数量。增强填充材料的方法之一是将石墨烯纳米片（GNP）添加到环氧灌浆中。通过对纯净的三部分环氧树脂（填充物A）和添加了0.1％GNP（按重量计）的三部分环氧树脂（填充物B）进行不同的机械测试，证明了这一点。利用两种填充材料获得的机械性能，然后使用有限元软件对管道截面进行建模，以确定不使用FRP复合材料包裹层的修复性能。使用Infill A和Infill B修复的管道与未修复的管道之间的破坏压力差分别为2.7％和4.2％。维修失败的原因是填充材料从管段上脱落。但是，这项研究为了解填充材料的特性以及修复后的管段上的数值模型提供了重要的信息。

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