期刊
MATERIALS
卷 10, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/ma10121386
关键词
auxetic; negative Poisson's ratio; honeycomb; re-entrant honeycomb; topology optimization; anomalous properties; computer simulations
类别
资金
- Ministry of Science and Higher Education in Poland [02/21/DS-PB/3493/2017, 02/21/DS-PB/3494/2017, 02/21/DS-MK/3498/2017]
This paper presents a finite-element analysis of honeycomb and re-entrant honeycomb structures made of a two-phase composite material which is optimized with respect to selected parameters. It is shown that some distributions of each phase in the composite material result in the counter-intuitive mechanical behaviour of the structures. In particular, negative values of effective Poisson's ratio, i.e., effective auxeticity, can be obtained for a hexagonal honeycomb, whereas re-entrant geometry can be characterized by positive values. Topology optimization by means of the method of moving asymptotes (MMA) and solid isotropic material with penalization (SIMP) was used to determine the materials' distributions.
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