Structural response of pyramidal core sandwich columns

被引:108
作者
Cote, Francois
Biagi, Russell
Bart-Smith, Hilary
Deshpande, Vikram S.
机构
[1] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22902 USA
[2] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England
关键词
pyramidal truss; sandwich panel; optimal design; mechanism maps;
D O I
10.1016/j.ijsolstr.2006.10.004
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
An experimental and analytical investigation is carried out to examine the in-plane compressive response of pyramidal truss core sandwich columns. The identified failure mechanisms include Euler buckling, shear buckling and face wrinkling. The operative mechanism is dependent on the properties of the bulk material and geometry of the sandwich columns and analytical formulae are derived for each of these modes. Failure maps are constructed for sandwich columns made from an elastic ideally-plastic material and AISI 304 stainless steel which has a strongly strain hardening response. Pyramidal core sandwich columns made from 304 stainless steel have been designed using these mechanism maps and the measured responses are compared with the analytical predictions. Finally, optimal single layer and multi-layer pyramidal sandwich column designs that minimize the weight for a given load carrying capacity are calculated using the developed analytical models for the failure of the sandwich columns. The results demonstrate that pyramidal core sandwich columns outperform the currently used hat-stiffened column design. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3533 / 3556
页数:24
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