This paper presents free vibration characteristics of laminated composite plates with different embedded delamination sizes and locations using three-dimensional finite elements. The free vibration analysis using the 3D finite element (FE) delamination model has merits in that it shows better accuracy but also shows the entire mode shape compared to the conventional approaches. This study investigates free vibration characteristics of laminated composite plates containing an various embedded delamination. The numerical results obtained are in good agreement with those reported by other investigators. Specifically, in this paper, attention is paid to the effects of the local vibration mode for various parameters, such as size of delamination, aspect ratio, and location of delamination.

ABSTRACT
 1. 서 론
 2. 엠베디드 층간분리 3차원 유한요소 모델
  2.1 3차원 유한요소 종류
  2.2 층간분리 모델링 방법
 3. 수치해석 개요 및 결과
  3.1 해석 개요
  3.2 해석 결과 요약 및 결론
 참고 문헌

• 노명현(포항산업과학연구원 강구조연구소 에너지인프라연구본부) | Noh Myung-Hyun
• 박대용(대림산업 기술개발원 특수교량팀) | Park Dae-Yong
• 이상열(안동대학교 토목공학과) | Lee Sang-Youl