국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	ANOMALOUS BUCKLING CHARACTERISTICS OF LAMINATED METAL-MATRIX COMPOSITE PLATES WITH CENTRAL SQUARE HOLES
저자	William L. Ko
Keyword	Anomalous buckling; Aspect ratio effect; Edge support effect; Hole size effect; Metal-matrix composites; Square cutout
URL	http://www.dfrc.nasa.gov/DTRS/1998/PDF/H-2241.pdf
보고서번호	NASA-TP-1998-206559
발행년도	1998
출처	NASA Dryden Flight Research Center
ABSTRACT	Compressive buckling analysis was performed on metal-matrix composite (MMC) plates with central square holes. The MMC plates have varying aspect ratios and hole sizes and are supported under different boundary conditions. The finite-element structural analysis method was used to study the effects of plate boundary conditions, plate aspect ratio, hole size, and the composite stacking sequence on the compressive buckling strengths of the perforated MMC plates. Studies show that by increasing the hole sizes, compressive buckling strengths of the perforated MMC plates could be considerably increased under certain boundary conditions and aspect ratios (밶nomalous?buckling behavior); and that the plate buckling mode could be symmetrical or antisymmetrical, depending on the plate boundary conditions, aspect ratio, and the hole size. For same-sized plates with same-sized holes, the compressive buckling strengths of the perforated MMC plates with [90/0/0/90]2 lamination could be as much as 10 percent higher or lower than those of the [45/?5/?5/45]2 laminations, depending on the plate boundary conditions, plate aspect ratios, and the hole size. Clamping the plate edges induces far stronger 밶nomalous?buckling behavior (enhancing compressive buckling strengths at increasing hole sizes) of the perforated MMC plates than simply supporting the plate edges.