Journal of the Korean Society of Manufacturing Technology Engineers (한국생산제조학회지)

The Korean Society of Manufacturing Technology Engineers (한국생산제조학회)
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Collapse Characteristics of CFRP Hat Member with Outer Laminated Angle Changes under Hygrothermal Environment with Temperature Changes

다양한 열습환경하에서 최외각층 변화에 따른 CFRP 모자형 부재의 압궤특성

  • Yang, Yongjun (Dep. of Fire Safety Management, College of Dongkang) ;
  • Hwang, Woochae (Dep. of Mechanical Design Engineering, University of Chosun) ;
  • Yang, Inyoung (Dep. of Mechanical Design Engineering, University of Chosun)
  • Received : 2013.07.17
  • Accepted : 2014.05.06
  • Published : 2014.06.15
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Abstract

Currently, CFRP composites are rapidly replacing steel plates, as they are lighter, stronger, and more elastic; however, they are poorly suited to hygrothermal and impact-collapsed environments because moisture can alter their molecule arrangement and chemical properties. In this study, environments are experimentally simulated in order to investigate changes in the moisture absorption inside a CFRP composite and to determine its weakest point. Moreover, changes in the moisture absorption ratio at temperatures of $60^{\circ}C$ and $80^{\circ}C$ are studied and compared in order to understand how changes in temperature affect moisture absorption inside CFRP composites. Results show that moisture absorption leads to a strength reduction of around 50%. In addition, the moisture absorption rate inside CFRP composites is shown to change rapidly with increasing temperature. Accordingly, it showed that the change in matrix also has a weak point.

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References

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