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The quasi-static and blast loading response of lattice structures

The quasi-static and blast loading response of lattice structures

Authors :
McKown, S.
Shen, Y.
Brookes, W.K.
Sutcliffe, C.J.
Cantwell, W.J.
Langdon, G.S.
Nurick, G.N.
Theobald, M.D.
Source :
International Journal of Impact Engineering. Aug2008, Vol. 35 Issue 8, p795-810. 16p.
Publication Year :
2008

Abstract

Abstract: A range of metallic lattice structures have been manufactured using the selective laser melting (SLM) rapid manufacturing technique. The lattice structures were based on [±45°] and [0°, ±45°], unit-cell topologies. Initially, the structures were loaded in compression to investigate their progressive collapse behaviour and associated failure mechanisms. Tests were then undertaken at crosshead displacement rates up to 3m/s in order to characterise the rate-dependent properties of these architectures. A series of blast tests were then undertaken on a ballistic pendulum in order to investigate the behaviour of lattice structures under these extreme loading conditions. During the compression tests, a buckling mode of failure was observed in the [0°, ±45°] lattice structures, whereas a stable progressive mode of collapse was evident in the [±45°] structures. The yield stress of the lattice structures exhibited moderate rate sensitivity, increasing by up to 20% over the range of conditions considered. The blast resistance of the lattice structures increased with increasing yield stress and has been shown to be related to the structures specific energy-absorbing characteristics. An examination of the lattice samples indicated that the collapse mechanisms were similar following both the compression and blast tests. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
0734743X
Volume :
35
Issue :
8
Database :
Academic Search Index
Journal :
International Journal of Impact Engineering
Publication Type :
Academic Journal
Accession number :
32099082
Full Text :
https://doi.org/10.1016/j.ijimpeng.2007.10.005