Virtual strain gage size study
Virtual strain gage size study
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虚拟应变计尺寸研究
DOI：
10.1111/ext.12172
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发表时间：
2015
影响因子：
1.6
通讯作者：
P. Reu
中科院分区：
文献类型：
--
作者：
P. Reu
DIC是非线性低通空间滤波运算；无论我们是否考虑子集和形状函数、应变计算中使用的应变窗口、结果的其他后处理的影响，每个决定都会影响测量的空间分辨率。更根本的是，散斑尺寸通过规定最小可能的子集来限制空间分辨率。做出此决定后，处理设置由允许的噪声水平控制，该噪声水平由数据过滤产生的可能的偏差误差平衡。本文介绍了确定最佳 DIC 软件设置的过程，以确定是否找到峰值位移或应变。
DIC is a non-linear low-pass spatial filtering operation; whether we consider the effect of the subset and shape function, the strain window used in the strain calculation, of other post-processing of the results, each decision will impact the spatial resolution, of the measurement. More fundamentally, the speckle size limits, the spatial resolution by dictating the smallest possible subset. After this decision the processing settings are controlled by the allowable noise level balanced by possible bias errors created by the data filtering. This article describes a process to determine optimum DIC software settings to determine if the peak displacements or strains are being found.