Mode I stress-intensity factor measurements by the electrical strain gage.
Mode I stress-intensity factor measurements by the electrical strain gage.
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通过电气应变计进行模式 I 应力强度因子测量。
DOI：
10.1299/kikaia.56.875
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
S. Fukuda
中科院分区：
文献类型：
--
作者：
S. Kurosaki;H. Nozaki;S. Fukuda
本文介绍了用电应变片测定I型应力强度因子（KI）的方法。断裂力学应用于工程时，必须采用一种方便的应变测量方法，准确地确定裂纹尖端附近的应力强度因子。通常，电应变计用于结构材料的应变测量。因此，在本研究中使用了应变计。本研究中使用的应变计类型是由5个测量网格组成的链式应变计。它用于检验中心裂纹试件（CCT）和单边裂纹板拉伸试件（SECT）以及密实型试件（CT）的试验。与分析值相比，实验确定的应力强度因子（KI）的精度在±10%以内。
This paper describes the method of determining the Mode I stress-intensity factor (KI) by using the electrical strain gage. When fracture mechanics is applied to engineering, The stress-intensity factor near the crack tip must be accurately determined by way of a convenient measuring method of the strain. Usually, electrical strain gages are used for the strain measurement of the structure material. Thus the strain gage is used in this study. The type of strain gage used in this study is the chain strain gage consisting of 5 measuring grids. It is used in the experiments which examine the center-cracked test specimens (CCT) and single-edge-cracked plate tension specimens (SECT) as well as the compact-type specimens (CT). The accuracy of the stress-intensity factor (KI) determined by the experiments is within ±10 percent, compared to the analytical value.