Damage Characterization in Glass Fiber/Epoxy Laminates Using Electronic Speckle Pattern Interferometry

被引：8
|
作者：
Loukil, M. S. [1 ,2 ]
Varna, J. [2 ]
Ayadi, Z. [1 ]
机构：
[1] Inst Jean Lamour, Sci & Ingn Mat & Met SI2M, Nancy, France
[2] Lulea Univ Technol, Dept Engn Sci & Math, Div Mat Sci, S-95187 Lulea, Sweden
来源：
EXPERIMENTAL TECHNIQUES | 2015年 / 39卷 / 02期
关键词：
Composite Materials; Interferometry; Nondestructive Testing; Speckle; interferometry; STIFFNESS REDUCTION; PLY CRACKS;
D O I：
10.1111/ext.12013
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The degradation of the elastic properties of composite laminates with intralaminar cracks is caused by reduced stress in the damaged layer which is mainly due to two parameters: the crack opening displacement (COD) and the crack sliding displacement (CSD). In this paper these parameters are measured experimentally, providing laminate stiffness reduction models with valuable information for validation of used assumptions and for defining limits of their application. In particular, the displacement field on the edges of a [0/ +70(4)/ -70(4)](s) glass fiber/epoxy laminate specimens with multiple intralaminar cracks is studied, and the COD and CSD dependence on the applied mechanical load is measured. The specimen full-field displacement measurement is carried out using ESPI (electronic speckle pattern interferometry). By studying the displacement discontinuities, the crack face displacements were measured. A comparison between the COD and the CSD (for the same crack) is performed.
引用
收藏
页码：38 / 45
页数：8
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