| タイトル | Nondestructive characterization of the elastic constants of fiber reinforced composites |
| 著者（英） | Mal, Ajit K.; Lih, Shyh-Shiuh; Bar-Cohen, Yoseph |
| 著者所属（英） | Jet Propulsion Lab., California Inst. of Tech. |
| 発行日 | 1993-01-01
1993 |
| 言語 | eng |
| 内容記述 | Composite structural components may be subjected to a variety of defects resulting in a sharp reduction in their load carrying capacity or even catastrophic failure. Thus, it is extremely important to have the means to monitor the degradation suffered by critical components of a structure for safe operation during its service life. A nondestructive method based on ultrasonics has recently been developed for the quantitative evaluation of composite structural components during service. The experimental part of the technique uses a two-transducer, pitch-catch type arrangement to generate a variety of elastic waves within the specimen immersed in water. The recorded reflection data are then analyzed by means of a theoretical model to back out the relevant properties. In this paper the method is applied to determine the stiffness constants of unidirectional graphite/epoxy materials. The measurements are shown to be efficient and sufficiently accurate so that it can be used for early detection of material degradation in composite structural elements during service. |
| NASA分類 | STRUCTURAL MECHANICS |
| レポートNO | 93A33919
AIAA PAPER 93-1349 |
| 権利 | Copyright |
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