초록

Ⅲ. 연구개발의 내용 및 범위
1. 트러스 형 PCM의 제조 평가 기술 ◦ 트러스형 PCM의 형상설계 기술 ◦ 트러스형 PCM 코어 샌드위치 판재 제조 기술 ◦ 트러스형 PCM 정적 기계적 특성 평가 기술
2. 금속 폼의 멀티스케일 해석 기술 ◦ 금속 폼의 압축 거동 특성 분석 ◦ 멀티스케일 해석 기술 개발

Abstract ▼

Metallic sandwich panels based on lattice cell structures have been developed for a wide range of potential applications with their lightweight and multi-functionality. Although the divers methods to fabricate sandwich panels with truss core, such as investment casting, perforation-bending and extru

Metallic sandwich panels based on lattice cell structures have been developed for a wide range of potential applications with their lightweight and multi-functionality. Although the divers methods to fabricate sandwich panels with truss core, such as investment casting, perforation-bending and extrusion-EDM, have been reported, which are limited to flat panels. The work have proposed a multi-point stretching(MPS) process to fabricate the sandwich panels with various cross-sectional shapes. In the MPS process, a three dimensional truss structure is built up by a number of pins pressed on the nodes of a perforated sheet. The process make it possible to fabricate the truss structure with locally different height and reduce material waste during perforation process compared with conventional processes. In this work, the MPS die-set which can build up the truss structure with 44 pyramidal unit cells has been fabricated. The lattice truss structures with different truss member angle were made of the SUS304 sheet which is perforated into diamond pattern by laser cutting M/C. Finally, sandwich panels were manufactured by brazed bonding between truss core and two solid face sheets. In order to investigate the structural performance of the panel and find out the optimum inclination angle to get maximum strength and stiffness, three types of mechanical tests; compression, shear and 3-point bending test, were carried out. And the results were discussed in two points of view; the same relative density and weight per unit area.

목차 Contents

• 표지 ... 1
• 제출문 ... 2
• 보고서 초록 ... 3
• 요약문 ... 4
• SUMMARY ... 6
• CONTENTS ... 7
• 목차 ... 8
• 제 1 장 연구개발과제의 개요 ... 9
• 제 1 절 연구개발의 필요성 ... 9
• 제 2 절 연구개발의 목표 및 내용 ... 10
• 제 2 장 국내외 기술개발 현황 ... 12
• 제 3 장 연구개발수행 내용 및 결과 ... 13
• 제 1 절 형상 제어 PCM의 단위셀 형상 최적화 및 제조 기술 ... 13
• 제 2 절 개방형 셀 구조체의 멀티스케일 해석기술 개발 ... 20
• 제 4 장 목표달성도 및 관련분야에의 기여도 ... 27
• 제 1 절 연구목표달성도 ... 27
• 제 2 절 연구결과의 기대효과 ... 28
• 제 5 장 연구개발결과의 활용계획 ... 29