The use of modal parameters in non-destructive evaluation of damage in composite structures

被引：0
|
作者：
Thanooja, S
Sujatha, C
Swarnamani, S
Rao, MH
机构：
来源：
TRENDS IN NDE SCIENCE AND TECHNOLOGY - PROCEEDINGS OF THE 14TH WORLD CONFERENCE ON NDT (14TH WCNDT), VOLS 1-5 | 1996年
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D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present work is concerned with experimental investigations on changes in modal parameters due to a physical change in a structure. A method of non destructive assessment of the integrity of three types of specimens made of fiber-reinforced composites using measurements of modal parameters is described. The experimental program includes mechanical and modal tests on the laminated composite beams in the undamaged state and in two or three additional states of progressive damage produced by loading the specimen to 60, 70 and 80% of the ultimate strength. Changes in the natural frequencies, damping ratios, mode shapes and Young's modulus were noted as the damage accumulated.
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页码：1141 / 1146
页数：6
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