Metallic sandwich panels with tetrahedral truss cores have been fabricated and their structural performance evaluated. A fabrication technique involving deformation-shaping and brazing has been used. The responses of the structure in core shear and panel bending have been measured. The results demonstrate robust behavior beyond the limit load. A finite element simulation of the core shear response duplicates the features found experimentally. When combined with the constitutive properties of the face sheet material, these shear characteristics have been shown to predict, with good fidelity, the limit load for panels in bending.
Issue Section:
Technical Papers
1.
Ashby, M. F., Evans, A. G., Fleck, N. A., Gibson, L. J., Hutchinson, J. W., and Wadley, H. N. G., 2000, Metal Foams: A Design Guide, Butterworth-Heinemann, Boston, MA.
2.
Clark, J. P., Roth, R., and Field, F. R., 1997, Techno-Economic Issues in Material Science (ASM Handbook Vol. 20, Materials Science and Design), ASM International, Materials Park, OH.
3.
Allen, H. G., 1969, Analysis and Design of Structural Sandwich Panels, Pergamon Press, Oxford, UK.
4.
Koiter
, W. T.
, 1963
, Koninkl. Nederl. Akademie van Wetenschappen, Ser. B
, 66
, pp. 265
–279
.5.
Hutchinson
, J. W.
, “Plastic Buckling
,” 1974
, Adv. Appl. Mech.
, 14
, pp. 67
–144
.6.
Budiansky
, B.
, 1999
, “On The Minimum Weights of Compression Structures
,” Int. J. Solids Struct.
, 36
, pp. 3677
–3708
.7.
Gerard, G., 1956, Minimum Weight Analysis of Compression Structures, New York University Press, New York.
8.
Tvergaard
, V.
, 1973
, “Imperfection-Sensitivity of a Wide Integrally Stiffened Panel Under Compression
,” Int. J. Solids Struct.
, 9
, pp. 177
–192
.9.
Weaver
, P. M.
, and Ashby
, M. F.
, 1997
, “Material Limits For Shape Efficiency
,” Prog. Mater. Sci.
, 41
, pp. 61
–128
.10.
Parkhouse, J. G., 1984, Structuring: A Process of Material Distribution, Proc. 3rd Int. Conf. On Space Structures, H. Nooschin, ed., Elsevier, London, pp. 367–374.
11.
Wicks
, N.
, and Hutchinson
, J. W.
, 2001
, “Optimal Truss Plates
,” Int. J. Solids Struct.
, 38
, pp. 5165
–5183
.12.
Evans
, A. G.
, Hutchinson
, J. W.
, Fleck
, N. A.
, Ashby
, M. F.
, and Wadley
, H. N. G.
, 2001
, “The Topological Design of Multifunctional Cellular Materials
,” Prog. Mater. Sci.
, 46
, pp. 309
–327
.13.
Deshpande
, V. S.
, and Fleck
, N. A.
, 2001
, “Collapse of Truss Core Sandwich Beams in 3-Point Bending
,” Int. J. Solids Struct.
, 38
, p. 6275
–6305
.14.
Fuller, R. B., 1961, “Synergetic Building Construction,” U.S. Patent, 2,986,241, 30.
15.
Evans
, A. G.
, 2001
, “Lightweight Materials and Structures
,” MRS Bull.
, 26
, p. 790
790
.16.
Gu
, S.
, Lu
, T. J.
, and Evans
, A. G.
, 2001
, “On The Design of Two-Dimensional Cellular Metals For Combined Heat Dissipation and Structural Load Capacity
,” Int. J. Heat Mass Transfer
, 44
, pp. 2163
–2175
.17.
Zok
, F. W.
, Rathbun
, H. J.
, Wei
, Z.
, and Evans
, A. G.
, 2003
, “Design of Metallic Textile Core Sandwich Panels
,” Int. J. Solids Struct.
, 40
, pp. 5707
–5722
.18.
Chiras
, S.
, Mumm
, D. R.
, Evans
, A. G.
, Wicks
, N.
, Hutchinson
, J. W.
, Dharmasena
, K.
, Wadley
, H. N. G.
, and Fichter
, S.
, 2002
, “The Structural Performance of Near-Optimized Truss Core Panels
,” Int. J. Solids Struct.
, 39
, pp. 4093
–4115
.19.
Sypeck
, D. J.
, and Wadley
, H. N. G.
, 2002
, “Cellular Metal Truss Core Sandwich Structures
,” Advanced Engineering Materials
, 4
(10
), pp. 759
–764
.20.
Hyun
, S.
, Karlsson
, A. M.
, Torquato
, S.
, and Evans
, A. G.
, 2003
, “Simulated Properties of Kagome´ and Tetragonal Truss Core Panels
,” Int. J. Solids Struct.
, 40
(25
), pp. 6989
–6998
.21.
Hutchinson
, J. W.
, and He
, M. Y.
, 2000
, “Buckling of Cylindrical Sandwich Shells With Metal Foam Cores
,” Int. J. Solids Struct.
, 37
, pp. 6777
–6794
.22.
Bart-Smith
, H.
, Hutchinson
, J. W.
, and Evans
, A. G.
, 2001
, “Measurement and Analysis of the Structural Performance of Cellular Metal Sandwich Contruction
,” Int. J. Mech. Sci.
, 43
, pp. 1945
–1963
.23.
Fleck, N. A., and Deshpande, V. S., 2004, “Blast Resistance of Clamped Sandwich Beams,” J. Appl. Mech., (in press).
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