NOTCH EFFECTS, STRESS STATE, AND DUCTILITY
NOTCH EFFECTS, STRESS STATE, AND DUCTILITY
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DOI：
10.1115/1.3443503
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发表时间：
1978-01-01
影响因子：
1.2
通讯作者：
AGOGINO, AM
中科院分区：
文献类型：
--
作者：
AGOGINO, AM
本文综述了缺口试件试验的文献，重点介绍了短期缺口试件拉伸试验。缺口的几何形状，应力状态，和光滑的酒吧缺口延性，缺口敏感性和断裂模式的拉伸性能的影响进行了讨论。针对缺口弱化破坏的设计，提出了一个基于缺口延性极限值的简单准则。在这项研究中考虑的金属的缺口延展性，可以近似为减少和从一个光滑的拉伸试验除以拉伸应力三轴系数，这是成比例的静水八面体剪切应力与缺口的比率。
A review of the literature on testing of notched specimens is provided with emphasis on short-term notched bar tension tests. The effects of notch geometry, stress state, and smooth-bar tensile properties on notched ductility, notch sensitivity, and mode of fracture are discussed. For design against failure due to notch weakening, a simple criterion based on a limiting value of notched ductility is proposed. Notched ductility for the metals considered in this study, can be approximated by the reduction in and from a smooth tension test divided by a tensile stress triaxiality factor that is proportional to the ratio of hydrostatic to octahedral shearing stresses associated with the notch.