Journal
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 251, Issue 2, Pages 354-366Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201384250
Keywords
auxetic; composite; sandwich structure; SIMP; strain energy; topology optimization
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Funding
- MNiSW [21-418/2013 DS-PB, 21-429/2013 DS-MK]
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A sandwich-structured composite is a special class of composite materials that is fabricated by attaching two thin but stiff layers to a lightweight but thick core. Composites analyzed in this paper consist of two different materials: auxetic and structural steel. The optimization criterion is minimum compliance for the load case where the frame's top boundary is downward loaded. Outer layers are made of steel while the middle layer is two-phase solid material composite. Only the middle layer is optimized by means of minimization of the objective function defined as the internal strain energy. In the first part of this paper we study the application of the solid isotropic material with penalization (SIMP) model to find the optimal distribution of a given amount of materials in sandwich-structured composite. In the second part we propose a multilayered composite structure in which internal layers surfaces are wavy. In both cases the total energy strain is analyzed. (C) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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