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논문 기본 정보

자료유형
학술저널
저자정보
Koo-Ahn Kwon (Korea Institute of Standards and Science) Hee-Sang Park (Korea Research Institute of Smart Material and Structures System Association) Man-Yong Choi (Korea Institute of Standards and Science) Jeong-Hak Park (Korea Institute of Standards and Science) Won-Jae Choi (Korea Institute of Standards and Science)
저널정보
한국비파괴검사학회 비파괴검사학회지 비파괴검사학회지 제37권 제2호
발행연도
2017.4
수록면
99 - 105 (7page)

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초록· 키워드

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Many composite materials are used in the aerospace industry because of their excellent mechanical properties. However, the nature of aviation exposes these materials to high temperature and high moisture conditions depending on climate, location, and altitude. Therefore, the molecular arrangement chemical properties, and mechanical properties of composite materials can be changed under these conditions. As a result, surface disruptions and cracks can be created. Consequently, moisture-impregnating defects can be induced due to the crack and delamination of composite materials as they are repeatedly exposed to moisture absorption moisture release, fatigue environment, temperature changes, and fluid pressure changes. This study evaluates the possibility of detecting the moisture-impregnating defects of CFRP and GFRP honeycomb structure sandwich composite materials, which are the composite materials in the aircraft structure, by using an active infrared thermography technology among non-destructive testing methods. In all experiments, it was possible to distinguish the area and a number of CFRP composite materials more clearly than those of GFRP composite material. The highest detection rate was observed in the heating duration of 50 mHz and the low detection rate was at the heating duration of over 500 mHz. The reflection method showed a higher detection rate than the transmission method.

목차

Abstract
1. Introduction
2. Materials and Devices
3. Experiment Methods
4. Discussion
5. Conclusions
References

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