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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 김선경
- 발행연도
- 2019
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- 서울과학기술대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
오류제보하기
프리폼 성형은 탄소 섬유 직조물을 이용한 RTM (resin transfer molding) 성형에 있어서 매우 중요한 부분을 차지하고 있다. 탄소 섬유 직조물의 프리폼의 변형 정도에 따라서 소재의 강도에 높은 관여를 하며, 그 중 전단 잠김 각도를 넘어서는 힘이 작용하게 되면 제품에 주름이 발생되어 RTM공정 시 불량발생의 원인이 된다. 그러므로 본 연구에서는 탄소섬유직조물의 전단변형 허용치를 정량화하고 실제 직조물의 성형과 수치모사를 이용하여 성형 특성을 검증하고자 한다.
이 연구에서는 탄소섬유직조물의 기계적 물성을 측정하기 위하여 세 가지 물성 측정 방법을 수행하였다. 전단변형특성을 측정하기 위하여 PFT(picture frame test)를 수행하였고, 연신특성을 평가하기 위하여 일축인장시험(uniaxial tensile test)를 수행하였다. 또한, 굽힘 특성을 측정하기 위하여 외팔보(cantilever)시험을 수행하였다.
뿐만 아니라, 공정 중에 나타나는 섬유구조의 실제변형을 조사하기 위하여 드레이핑 실험과 스탬핑 실험을 수행하여 그 결과를 분석하였다. 그 결과 섬유 방향의 설정에 따른 주름의 특성을 확인하고 그 결과를 평가하였다. 앞에 언급한 물성 측정 결과들을 이용하여 수치해석을 수행하였고, 이 결과를 실험 결과와 비교 분석 하였다.
이 연구에서는 탄소섬유직조물의 기계적 물성을 측정하기 위하여 세 가지 물성 측정 방법을 수행하였다. 전단변형특성을 측정하기 위하여 PFT(picture frame test)를 수행하였고, 연신특성을 평가하기 위하여 일축인장시험(uniaxial tensile test)를 수행하였다. 또한, 굽힘 특성을 측정하기 위하여 외팔보(cantilever)시험을 수행하였다.
뿐만 아니라, 공정 중에 나타나는 섬유구조의 실제변형을 조사하기 위하여 드레이핑 실험과 스탬핑 실험을 수행하여 그 결과를 분석하였다. 그 결과 섬유 방향의 설정에 따른 주름의 특성을 확인하고 그 결과를 평가하였다. 앞에 언급한 물성 측정 결과들을 이용하여 수치해석을 수행하였고, 이 결과를 실험 결과와 비교 분석 하였다.
목차
요약 ····················································································································ⅰ목차 ····················································································································ⅱ표목차·················································································································ⅳ그림목차··············································································································ⅳI. 서 론 ················································································································ 11.1 연구 배경 ······································································································· 11.2 연구 목적과 내용···························································································· 3II. 실 험················································································································ 52.1 물성 측정 방법······························································································· 52.2 성형 실험 방법······························································································10III. 수치모사·········································································································123.1 수치모사 이론································································································123.2 수치모사 모델································································································15IV. 실험 결과········································································································174.1 실험 결과·······································································································174.2 수치모사 결과································································································20V. 결 론···············································································································23참고문헌··············································································································50영문초록(Abstract)································································································55감사의 글 ··········································································································56
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