Complete Isochromatic Fringe‐order Analysis in Digital Photoelasticity by Fourier Transform and Load Stepping
Complete Isochromatic Fringe‐order Analysis in Digital Photoelasticity by Fourier Transform and Load Stepping
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DOI：
10.1111/j.1475-1305.2005.00183.x
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发表时间：
2005-05
期刊：
影响因子：
2.1
通讯作者：
B. Zuccarello
中科院分区：
文献类型：
--
作者：
B. Zuccarello
摘要：本文提出了一种新的全自动光弹性技术，它基于傅里叶变换和条纹中心包络。使用两个图像的等差线获得不同的负载和一个简单的计算程序，该方法允许用户的任何任意线上选择的模型域上的等差线条纹延迟的完整的确定，而不需要补充的外部信息或校准。各种实验证实了该方法的准确性，理论上估计约0.07条纹订单。由于其简单性和足够的准确性，该方法也可以由非专业用户用于工业领域。
Abstract: In this paper, a new fully automated photoelastic technique based on both the Fourier transform and the envelope of the fringe centres, is presented. Using two images of the isochromatics acquired with different loads and a simple calculation routine, the method allows the user the complete determination of the isochromatic fringe retardation on any arbitrary line chosen over the model domain, without the need for supplementary external information or calibration. Various experiments have corroborated the accuracy of the method, estimated theoretically to about 0.07 fringe orders. As a result of its simplicity and sufficient accuracy, the method can be used in the industrial field also by a non‐expert user.