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首页> 外文会议>ASME international pipeline conference 2008 >AN ANALYTICAL INTERACTION RULE FOR CORROSION FLAWS
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AN ANALYTICAL INTERACTION RULE FOR CORROSION FLAWS

机译：腐蚀缺陷的分析相互作用规则

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Corrosion is a degradation mechanism that is very common in pipelines and frequently the corrosion flaws develop close one to another. Since a defect causes a perturbation in its neighboring stress field, it is a common procedure to treat close by flaws as a single one, a cluster whose dimensions envelop the whole group of defects, and some criterion must be employed to determine if two flaws are close enough to justify its clustering. The defect interaction rules available at present have practical or experimental foundations and, sometimes, one is substantially different from another. The objective of this article is to present an interaction rule based on analytical solutions for stress and strain around a volumetric flaw in a pressurized thin wall cylinder. The two possible straining modes are identified and how strain and stress propagates from a flaw into the undamaged region of the pipe is solved in the linear elastic domain. Based in this solution, a defect interaction rule is developed. This analytical interaction rule is compared to selected interaction rules commonly employed by the industry nowadays.
机译：腐蚀是一种降解机制，在管道中非常常见，腐蚀缺陷经常彼此靠近。由于缺陷会在其邻近的应力场中引起扰动，因此通常将缺陷附近的缺陷视为一个缺陷，将其尺寸包围整个缺陷组的簇视为通用过程，并且必须采用一些准则来确定是否存在两个缺陷足够接近以证明其聚类合理。当前可用的缺陷相互作用规则具有实践或实验基础，有时，一个规则与另一个规则有很大不同。本文的目的是提出一种基于压力薄壁圆柱体中体积缺陷周围应力和应变的解析解的相互作用规则。确定了两种可能的应变模式，并解决了在线性弹性域中应变和应力如何从缺陷传播到管道的未损坏区域。基于此解决方案，开发了一种缺陷交互规则。将此分析交互规则与当今行业通常采用的选定交互规则进行比较。

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