首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.3: Design and Analysis; 20050717-21; Denver,CO(US) >NUMERICAL CORRELATION OF FRACTURE BEHAVIOR IN AXIALLY CRACKED PIPELINES USING CONSTRAINT DESIGNED FRACTURE SPECIMENS
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NUMERICAL CORRELATION OF FRACTURE BEHAVIOR IN AXIALLY CRACKED PIPELINES USING CONSTRAINT DESIGNED FRACTURE SPECIMENS

机译:用约束设计的断裂标本对轴向裂纹管道的断裂行为进行数值相关

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摘要

This work explores applications of constraint designed fracture specimens in defect assessments of pressurized pipelines and cylindrical vessels. The primary objective is to gain some understanding of the potential applicability of SE(T) specimens in defect assessments of pressurized pipelines and cylindrical vessels. The present study builds upon the J-Q approach using plane-strain solutions to characterize effects of constraint on cleavage fracture behavior for fracture specimens and cracked pipes. Under increased loading, each cracked configuration follows a characteristic J-Q trajectory which enables comparison of the corresponding crack-tip driving force. A key outcome of this investigation is that toughness data measured using SE(T) specimens appear more applicable for cleavage fracture predictions of pressurized pipelines and cylindrical vessels than standard, deep notch fracture specimens under bend loading. The results encourage further development of constraint-designed SE(T) specimens for fracture assessments of pressurized pipes and cylindrical vessels.
机译:这项工作探讨了约束设计的断裂标本在加压管道和圆柱形容器的缺陷评估中的应用。主要目的是对SE(T)样品在加压管道和圆柱容器的缺陷评估中的潜在适用性有所了解。本研究建立在使用平面应变解决方案的J-Q方法的基础上,以表征约束条件对断裂标本和破裂的管道的劈裂断裂行为的影响。在增加的载荷下,每个裂纹构型都遵循特征性的J-Q轨迹,从而可以比较相应的裂纹尖端驱动力。这项研究的关键成果是,与标准的深切口缺口试样在弯曲载荷下相比,使用SE(T)试样测量的韧性数据似乎更适用于加压管道和圆柱容器的劈裂断裂预测。结果鼓励进一步开发用于压力管道和圆柱形容器断裂评估的约束设计SE(T)标本。

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