대한조선학회지 (Bulletin of the Society of Naval Architects of Korea)
- 제26권4호
- /
- Pages.67-80
- /
- 1989
- /
- 1225-1178(pISSN)
- /
- 2765-2858(eISSN)
원공이 있는 복합적층판의 파괴특성 연구
Study on Failure Characteristics of Laminate with a Hole
초록
복합적층 구조물의 체결특성을 연구하기에 앞서 구조물 제작시 필연적으로 대두되는 원공이 있는 적층판의 기 제시된 몇 가지 파괴해석 모델을 고찰하고, 파괴특성을 알아 보았다. 또한, 원공이 있는 단일방향 복합재료와
This Paper is concerned with the fracture behavoir of Unidirectional Laminate(UD) and the characteristic length of Multidirectional Laminate(MD) around hole under the Uniform Tensial Strain. Two fracture mechanical concepts of the Waddoups-Eisenman-Kaminski(WEK) model based on the Linear Elastic Fracture Mechanics(LEFM) and the Whitney-Nuismer Model based on Point and Average Stress Criteria were applied. The characteristic length of a laminate with a hole is then obtained using the coefficient of stress reduction and the experimental results, and it can be utilized in predicting the stress level at which the specimen will fracture. The results of the fracture characteristics and the strength of the specimens having a hole in the center can be used as the important experimental data in the research branch of the mechanical fastening of laminated structures. The Ultrasonic scanning and the Acoustic Emission(AE) method were utilized in order to find out the initial defects and the fracture behavior, respectively.
키워드