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Simulation of functional failure in GRP mortar pipes

机译:GRP砂浆管功能失效的模拟

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摘要

The main objective of this article is to simulate and analyze the functional failure in composite pipes subjected to internal hydrostatic pressure. A progressive damage modeling is developed taking into account the influence of core layer incorporated in order to increase the pipe stiffness. The modeling procedure consists of four parts as model preparation, stress analysis, failure evaluation and degradation rules. The developed modeling is validated using experimental results of a composite pipes consisting of FRP and sand layers. The influence of two main parameters as core thickness and the winding angles of cross plies are investigated. It is observed that First-Ply-Failure (FPF) and Functional Failure (FF) pressures increase linearly with increasing the core thickness; however the relative difference between FPF and FF pressures decreases. Three types of boundary conditions imposed from most common experimental setups are also simulated and analyzed. The variations of FF versus winding angles are investigated for all three sets of boundary conditions.
机译:本文的主要目的是模拟和分析承受内部静水压力的复合管的功能失效。考虑到并入的芯层的影响,开发了一种渐进式损伤模型,以提高管道的刚度。建模过程包括模型准备,应力分析,失效评估和退化规则四个部分。使用由FRP和砂层组成的复合管的实验结果验证了开发的模型。研究了两个主要参数(芯厚度和交叉层的缠绕角度)的影响。可以观察到,随着芯厚度的增加,初次失效(FPF)和功能失效(FF)压力呈线性增加。但是,FPF和FF压力之间的相对差减小了。还对最常见的实验设置所施加的三种边界条件进行了模拟和分析。对于所有三组边界条件,都研究了FF对绕组角的变化。

著录项

  • 来源
    《Composite Structures》 |2014年第7期|155-163|共9页
  • 作者

    Roham Rafiee; Farshid Reshadi;

  • 作者单位

    Composites Research Laboratory, Faculty of New Sciences and Technologies, University of Tehran, End of the North Karegar St., Tehran 1439955941, Iran;

    Composites Research Laboratory, Faculty of New Sciences and Technologies, University of Tehran, End of the North Karegar St., Tehran 1439955941, Iran;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Composites; Pipe; Filament winding; Functional failure; Core layer;

    机译:复合材料;管;细丝缠绕;功能故障;核心层;

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