Fabrication and structural performance of periodic cellular metal sandwich structures
Fabrication and structural performance of periodic cellular metal sandwich structures
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DOI：
10.1016/s0266-3538(03)00266-5
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发表时间：
2003-12-01
影响因子：
9.1
通讯作者：
Evans, AG
中科院分区：
文献类型：
--
作者：
Wadley, HNG;Fleck, NA;Evans, AG
具有周期性开芯的金属夹层板是重要的新结构，通过新颖的制造和拓扑设计工具实现。基于桁架和壳元素（蛋盒）的片状成型以及纺织品组装的制造协议，使得通过廉价的路线制造坚固的结构成为可能。拓扑优化能够在桁架长度尺度上控制失效机制，从而实现优越的结构性能。分析、测试和优化表明，与随机泡沫相比，由这些芯材构成的夹层板承受的载荷相对密度要低得多。此外，在低相对密度下，桁架和纺织芯的峰值强度优于蜂窝，因为它们具有优异的抗屈曲性。与蜂窝相比，桁架/纺织芯的额外优势在于其潜在的更低制造成本以及多功能。(C) 2003 Elsevier Ltd.版权所有。
Metallic sandwich panels with periodic, open-cell cores are important new structures, enabled by novel fabrication and topology design tools. Fabrication protocols based on the sheet forming of trusses and shell elements (egg-boxes) as well as textile assembly have allowed the manufacture of robust structures by inexpensive routes. Topology optimization enables control of failure mechanisms at the truss length scale, leading to superior structural performance. Analysis, testing and optimization have demonstrated that sandwich panels constructed with these cores sustain loads at much lower relative densities than stochastic foams. Moreover, the peak strengths of truss and textile cores are superior to honeycombs at low relative densities, because of their superior buckling resistance. Additional benefits of the truss/textile cores over honeycombs reside in their potentially lower manufacturing cost as well as in their multifunctionality. (C) 2003 Elsevier Ltd. All rights reserved.