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FAILURE EXPERIMENTS ON PIPES WITH LOCAL WALL THINNING SUBJECTED TO MULTI-AXIAL LOADS

机译:多轴载荷作用下局部壁变薄的管材的失效实验

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Piping lines in nuclear power plants may experience multi-axial loads including tensile force, bending and torsion moments during operation. There is a lack of guidance for failure evaluation under the multi-axial loads including torsion moment. ASME B&PV Code Section Ⅺ Working Group is currently developing fully plastic failure evaluation procedures for pressurized piping items containing local wall thinning subjected to multi-axial loads. A failure estimation method for locally wall thinned pipes subjected to multi-axial loads including torsion moment has been proposed through numerical analyses. In this study, in order to investigate the failure behavior of the pipes with local wall thinning subjected to multi-axial loads including the torsion, failure experiments were performed on 20 mm diameter carbon steel pipes with a local wall thinning. Based on the experimental results, the proposed failure estimation method is confirmed to be applicable to pipes with local wall thinning.
机译:核电厂的管道在运行过程中可能会承受多轴载荷,包括拉力,弯曲和扭转力矩。缺乏包括扭转力矩在内的多轴载荷下失效评估的指导。 ASME B&PV规范部分Ⅺ工作组目前正在为包含承受多轴载荷的局部壁变薄的加压管道项目开发完全塑性破坏评估程序。通过数值分析,提出了局部壁薄管在多轴载荷作用下的扭转破坏预测方法。在这项研究中,为了研究局部壁变薄的管道在多轴载荷(包括扭力)作用下的破坏行为,对直径20 mm的局部壁变薄的碳钢管进行了破坏实验。根据实验结果,所提出的失效估计方法被证实适用于局部壁变薄的管道。

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