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Effect of Repetitive Impacts on the Mechanical Behavior of Glass Fiber-reinforced Polyurethane Foam

반복 충격이 유리섬유 강화 폴리우레탄 폼의 기계적 성능에 미치는 영향

  • Kim, Myung-Sung (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Jeong-Hyeon (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Kim, Seul-Kee (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 김명성 (부산대학교 조선해양공학과) ;
  • 김정현 (부산대학교 조선해양공학과) ;
  • 김슬기 (부산대학교 조선해양공학과) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Received : 2018.08.20
  • Accepted : 2019.02.22
  • Published : 2019.02.28

Abstract

In a cryogenic storage structure, the insulation system is in an environment in which fluid impact loads occur throughout the lifetime of the structure. In this study, we investigated the effect of repetitive impact loading on the mechanical performance of glass fiber-reinforced polyurethane foam. The repeated impact loading test was conducted in accordance with the required impact energy and the required number of repetitive impacts. The impact behavior of glass fiber-reinforced polyurethane foam was analyzed in terms of stress and displacement. After the impact test, the specimen was subjected to a compression test to evaluate its mechanical performance. We analyzed the critical impact energy that affected mechanical performance. For the impact conditions that were tested, the compressive strength and elastic modulus of the polyurethane foam can be degraded significantly.

Keywords

Glass fiber-reinforced polyurethane foam;Impact load;Repetitive impact;Mechanical behavior;Impact behavior

Acknowledgement

Supported by : 한국연구재단

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