샌드위치 복합재료의 처짐과 파손특성 향상을 위한 계면 구조
Interface structure for improving deflection and fracture of sandwich composites
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초록
A method of improving mechanical performance of a sandwich structure that is manufacture by vacuum assisted resin transfer molding (VARTM) process has been proposed. When a closed-cell foam is employed, penetration of resin into the foam is limited to cells opened by cutting. A two-dimensional array of holes is made on the surface of the foam to enhance interfacial strength. A device to create the hole array is devised and built. Experimental investigations have been conducted for different hole depths. Specimens have been manufactured by a VARTM process and then tested by the three-point bending. The results show increased stiffness and strength. Moreover, the location of fracture has been moved away from the interface toward to the center.
Abstract
A method of improving mechanical performance of a sandwich structure that is manufacture by vacuum assisted resin transfer molding (VARTM) process has been proposed. When a closed-cell foam is employed, penetration of resin into the foam is limited to cells opened by cutting. A two-dimensional array of holes is made on the surface of the foam to enhance interfacial strength. A device to create the hole array is devised and built. Experimental investigations have been conducted for different hole depths. Specimens have been manufactured by a VARTM process and then tested by the three-point bending. The results show increased stiffness and strength. Moreover, the location of fracture has been moved away from the interface toward to the center.
참고문헌 (8)
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