期刊
MATERIALS & DESIGN
卷 29, 期 10, 页码 2038-2042出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2008.04.013
关键词
plastic behavior; failure analysis; buckling
资金
- National Natural Science Foundation of China [10702033]
- China Postdoctoral Science Foundation [2006040 0465]
- Explosion Science and Technology [KFJJ07-3]
The stiffness and the strength of block lattice truss materials were derived, as well as polyhedrical yield surfaces. Tension yield, compression yield and compression buckling of struts are the three main micro-failure mechanisms of the lattice materials. It is shown that when the relative density of the lattice is smaller than a critical value micro compression buckling of struts will dominate the macro failure mode of the material under macro shearing loading or even macro tensile loading. The lattice truss materials may be optimal designed according to their stacking mode of struts and the critical relative density. (C) 2008 Elsevier Ltd. All rights reserved.
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