An overdeterministic approach for measuringKI using strain gages
An overdeterministic approach for measuringKI using strain gages
复制标题
使用应变计测量 KI 的超确定性方法
DOI：
10.1007/bf02317564
复制
发表时间：
1988
影响因子：
2.4
通讯作者：
J. Dally
中科院分区：
文献类型：
--
作者：
John Berger;J. Dally
本文描述了一种由径向应变ε rr的多次测量确定开模应力强度因子KI的超确定性方法。该方法进行了验证与紧凑的拉伸试样的实验研究，其中应变沿着0，45和90度线进行了测量，使用10个应变传感器，每个条形计的条形计。结果表明，在裂纹尖端附近的区域的应变场的三个或四个参数的模型的误差在1%至3%的范围内。
An overdeterministic method for determining the opening-mode stress-intensity factor,KI, from many measurements of the radial strain,∈rr, is described. The method was verified with an experimental study of a compact-tension specimen where strains along the 0, 45 and 90-degree lines were measured using strip gages with ten strain sensors per strip gage. The results indicated errors in the range of one to three percent with three or four parameter models of the strain field in the region near the crack tip.