Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method
Identification of the local stiffness reduction of a damaged composite plate using the virtual fields method
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DOI：
10.1016/j.compositesa.2007.04.006
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发表时间：
2007-09
影响因子：
8.7
通讯作者：
Jin-Hwan Kim;F. Pierron;K. SYED-MUHAMAD;M. Wisnom;M. Grédiac;E. Toussaint
中科院分区：
文献类型：
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作者：
Jin-Hwan Kim;F. Pierron;K. SYED-MUHAMAD;M. Wisnom;M. Grédiac;E. Toussaint
在本研究中，损伤检测问题被表述为识别受损复合板中的空间刚度分布。通过使用虚拟场方法处理从光学偏转测量技术获得的全场异质曲率场，该方法适用于检索受损碳环氧树脂板的二维刚度分布图。该方法不仅可以确定损坏的位置，还可以对损坏区域的刚度降低进行相当好的估计。本文描述了该过程，在模拟测量中进行了验证，并给出了一些初步实验结果。
In the present study, a damage detection problem is formulated as the identification of the spatial stiffness distribution in a damaged composite plate. Full-field heterogeneous curvature fields obtained from an optical deflectometry technique are processed by using the virtual fields method adapted to retrieve the 2D stiffness distribution map of a damaged carbon-epoxy plate. The method not only picks up the location of the damage but also provides a fairly good estimate of the stiffness reduction in the damaged area. In this paper, the procedure is described, validated on simulated measurements and some initial experimental results are given.