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首页> 外文会议>ASME international pipeline conference 2008 >STRAIN-BASED DESIGN METHODS FOR COMPOSITE REPAIR SYSTEMS
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STRAIN-BASED DESIGN METHODS FOR COMPOSITE REPAIR SYSTEMS

机译：复合修复系统基于应变的设计方法

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Composite materials are commonly used to repair corroded and mechanically-damaged pipelines. Most of these repairs are made on straight sections of pipe. However, from time to time repairs on complex geometries such as elbows, tees, and field bends are required. Conventional design methods for determining the amount of required composite materials are not conducive for these types of repairs. Over the past several years, the author has developed a methodology for assessing the level of reinforcement provided by composite materials to damaged pipelines using finite element methods. Instead of stress as the design basis metric, the method employs a strain-based design criteria that is ideally-suited for evaluating the level of reinforcement provided to non-standard pipe geometries. The finite element work has been validated using experimental methods that employed strain gages placed beneath the composite repair to quantify the level of reinforcement provided by the repair. This paper provides a detailed description of the strain-based design method along with appropriate design margins for both the reinforced steel and long-term performance of the composite materials.
机译：复合材料通常用于修复腐蚀和机械损坏的管道。这些维修大部分是在管道的直段进行的。但是，有时需要修理复杂的几何形状，例如肘部，T形和弯头。用于确定所需复合材料量的常规设计方法不利于这些类型的维修。在过去的几年中，作者开发了一种方法，用于使用有限元方法评估复合材料对受损管道提供的增强水平。该方法采用应力为基础的设计标准代替应力作为设计基础指标，该标准非常适合评估提供给非标准管道几何形状的钢筋的水平。使用实验方法验证了有限元工作，该方法采用了放置在复合材料修补物下方的应变计来量化修补物提供的增强水平。本文详细介绍了基于应变的设计方法，以及针对钢筋和复合材料的长期性能的适当设计裕度。

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