폴리머기지 복합재료 충격시험결과의 신뢰성평가
초록
Mechanical components comprising light-weight materials receive significant attention as they contribute to saving energy in transportation means and, thereby, keeping our planet sustainable. As the light-weight stiff polymer matrix composites are prone to cracking caused by the impact on the surface, the impact-inducing mechanical behavior needs to be studied prior to wide applications. The behavior of the laminated glass fiber epoxy composite obtained using the free-fall low-velocity impact technique is studied. Equations based on the mechanics were programmed to be compared with the experimental measurements. Both results compared reasonably well, which indicated the reliability of the experimental data obtained. The hemi-circular impactor induced Hertzian circular damage within the composite. The present study assessed the mechanical behavior of the composites both experimentally and theoretically with reasonable agreement.
Keywords:
Composite, Material, Polymer, Impact, Low-velocityReferences
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Professor in the Department of Mechanical Engineering, Kookmin University.His research interest is Mechanics, design, and materials.
E-mail: twkim@kookmin.ac.kr