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首页> 外文会议>ASME Pressure Vessels and Piping conference >PLASTIC COLLAPSE ASSESSMENT PROCEDURE IN P-M DIAGRAM METHOD FOR PIPE BENDS WITH A LOCAL THIN AREA UNDER COMBINED PRESSURE AND OUT-OF-PLANE BENDING MOMENT
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PLASTIC COLLAPSE ASSESSMENT PROCEDURE IN P-M DIAGRAM METHOD FOR PIPE BENDS WITH A LOCAL THIN AREA UNDER COMBINED PRESSURE AND OUT-OF-PLANE BENDING MOMENT

机译：塑料折叠评估程序在P-M图中用局部薄面积的P-M图方法，包括局部薄面积和平面外弯矩

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摘要

Pipe bends are common elements in piping system such as power or process piping, and local thinning are typically occurred on pipe bends due to erosion or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in p-M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p, and external out-of-plane bending moment, M, due to earthquake, etc., is proposed, which is derived from the reference stress. In this paper, only cases of that an LTA is located in the crown of pipe bends are considered. The plastic collapse loads derived from the p-M diagram method are compared with the results of both experiments and FEA for pipe bends of the same size with various configurations of an LTA.
机译：管道弯曲是管道系统中的普通元件，例如电源或工艺管道，并且由于腐蚀或腐蚀而通常在管弯上发生局部变薄。因此，重要的是在组合内部压力和外部弯矩下建立具有局部薄面积（LTA）的管弯曲的塑料塌陷条件。本文中，PM（内压比和外部弯曲力矩比的简化塑料折叠评估程序管道弯曲的局部薄面积与内部压力，P和外部外平面外弯矩外，提出了由于地震等而导致的，这是从参考应力衍生的。在本文中，考虑了LTA的案例位于管弯的冠部中。将源自P-M图方法的塑料塌陷载荷与具有相同尺寸的管弯曲的实验和FEA的结果进行比较，以具有LTA的各种配置。

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