THE SIZE OF A UNIFORM STRESS PROCESS ZONE AT FRACTURE INITIATION

机译：断裂开始时均匀应力过程区的大小

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The process zone description is often used to represent the micro-mechanistic processes that are operative in the immediate vicinity of a crack tip. The process zone is an infinitesimally thin strip, and the theoretical analysis is considerably simplified if the stress within the process zone is assumed to be uniform. The paper derives an expression for the size of a uniform stress process zone when fracture initiates at the tip of a sharp crack. The expression relates this size to the size appropriate to the case of a semi-infinite crack in an infinite solid, and is a two term expression in terms of the ratio of this size to a characteristic structural dimension. The expression is validated against known results for specific geometrical configurations.

机译：工艺区域描述通常用于表示在裂纹尖端附近操作的微机械过程。工艺区域是一条无限长的薄带，如果假定工艺区域内的应力均匀，则理论分析将大大简化。当断裂在尖锐裂纹的尖端开始时，本文得出了均匀应力过程区大小的表达式。该表达式使该尺寸与适合于无限固体中的半无限裂纹的情况的尺寸相关，并且是关于该尺寸与特征结构尺寸的比率的两项表达式。根据特定几何构型的已知结果对表达式进行验证。

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来源
《ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.3: Design and Analysis》|2006年|433-437|共5页
会议地点 Vancouver(CA)
作者
E. SMITH;
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作者单位

School of Materials The University of Manchester Grosvenor Street, Manchester M1 7HS United Kingdom;

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原文格式 PDF
正文语种 eng
中图分类工业用热工设备;
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THE SIZE OF A UNIFORM STRESS PROCESS ZONE AT FRACTURE INITIATION

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