Sage Journals: Discover world-class research

Abstract

Lattice structures based on two simple architectures have been manufactured from 316L stainless steel using the selective laser melting process. The compressive properties of structures based on a body-centered cubic (BCC) and a similar structure with vertical pillars (BCC-Z) were initially investigated at quasi-static rates of strain. Blast tests were subsequently performed on the lattice structures as well as on lattice sandwich structures with CFRP skins. When subjected to quasi-static compression loading, the BCC structure exhibited a progressive mode of failure, whereas the BCC-Z lattice deformed in a buckling-dominated mode of collapse. The blast response of the lattice cubes exhibited a linear dependency on the applied impulse up to the threshold for material densification. Relationships between the blast resistance and both the yield stress and energy absorption characteristics of the lattices have been established and an examination of the failed samples indicated that the collapse modes were similar in both the quasi-static and blast-loaded samples. Finally, the failure modes observed in the blast-loaded sandwich panels were investigated and found to be similar to those observed in the lattice blocks.

Keywords

Blast cladding lattice sandwich panel selective laser melting unit cell

Get full access to this article

View all access options for this article.

References

Deshpande VS and Fleck NA Collapse of truss core sandwich beams in 3-point bending. Int J Solids Struct 2001; 38(36-37): 6275-6305.

Deshpande VS , Fleck NA and Ashby MF Effective properties of the octet-truss lattice material. J Mech Phys Solids 2001; 49(8): 1747-1769.

Deshpande VS , Ashby MF and Fleck NA Foam topology: bending versus stretching dominated architectures. Acta Mater 2001; 49(6): 1035-1040.

Zok FW , Rathbun HJ , Wei Z. and Evans AG Design of metallic textile core sandwich panels. Int J Solids Struct 2003; 40(21): 5707-5722.

Chiras S. , Mumm DR , Evans AG , Wicks N. , Hutchinson JW , Dharmasena K. , et al. The structural performance of near-optimized truss core panels . Int J Solids Struct 2002; 39(15): 4093-4115.

Wang J. , Evans AG , Dharmasena K. and Wadley HNG. On the performance of truss panels with Kagomé cores. Int J Solids Struct 2003; 40(25): 6981-6988.

Sypeck DJ Cellular truss core sandwich structures. Appl Compos Mater 2005; 12(3): 229-246.

Ashby MF , Evans AG , Fleck NA , Gibson LJ , Hutchinson JW and Wadley HNG. Metal foams: a design guide. Burlington: Butterworth-Heinemann, 2000.

Hanssen AG , Enstock L. and Langseth M. Close-range blast loading of aluminium foam panels. Int J Impact Eng 2002; 27(6): 593-618.

10.

Mines RAW. On the characterisation of foam and micro-lattice materials used in sandwich construction. Strain 2008; 44(1): 71-83.

11.

McKown S. , Shen Y. , Brookes WK , Sutcliffe CJ , Cantwell WJ , Langdon GS , et al. The quasi-static and blast loading response of lattice structures. Int J Impact Eng 2008; 35(8): 795-810.

12.

Shen Y. , Mckown S. , Tsopanos S. , Sutcliffe CJ , Mines RAW and Cantwell WJ The mechanical properties of sandwich structures based on metal lattice architectures . J Sandwich Struct Mater 2010 ; 12(2): 159-180.

13.

Langdon GS , Karagiozova D. , Theobald MD , Nurick GN , Lu G. and Merrett RP Fracture of aluminium foam core sacrificial cladding subjected to air-blast loading. Int J Impact Eng 2010; 37(6): 638-651.

14.

Karagiozova D. , Langdon GS and Nurick GN Blast attenuation in cymat foam core sacrificial claddings. Int J Mech Sci 2010; 52(5): 758-776.

15.

Karagiozova D. , Nurick GN , Langdon GS , Yuen SCK , Chi Y. and Bartle S. Response of flexible sandwich-type panels to blast loading. Compos Sci Technol 2009; 69(6): 754-763.

16.

Theobald MD Blast loading of sandwich panels with thin-walled tube cores, PhD Thesis, University of Cape Town, 2007.

17.

Jones N. Structural impact. Cambridge: Cambridge University Press, 1989 (1997 [printing]), xvi, p.575.

18.

Langdon G. and Schleyer G. Unusual strain rate sensitive behavior of AISI 316L austenitic stainless steel . J Strain Anal Eng 2004; 39(1): 71-86.

Supplementary Material

Please find the following supplemental material available below.

For Open Access articles published under a Creative Commons License, all supplemental material carries the same license as the article it is associated with.

For non-Open Access articles published, all supplemental material carries a non-exclusive license, and permission requests for re-use of supplemental material or any part of supplemental material shall be sent directly to the copyright owner as specified in the copyright notice associated with the article.

0.00 MB

0.05 MB

The quasi-static and blast response of steel lattice structures

Abstract

Keywords

Get full access to this article

References

Supplementary Material