Journal
COMPOSITE STRUCTURES
Volume 236, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.111899
Keywords
Three-dimensional auxetic material; Negative Poisson's ratio; Tension-twist coupling; Additive manufacturing
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Funding
- Graduate Technological Innovation Project of Beijing Institute of Technology [2018CX20011]
- National Natural Science Foundation of China [11602004, 11702023, 11325210]
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In recent years, as the development of additive manufacturing technology, 3D negative Poisson's ratio (NPR) materials attract many researchers' interest. In this paper, a novel 3D NPR material design method based on the tension-twist coupling effect has been proposed. A novel category of 3D NPR and positive Poisson's ratio (PPR) materials by linking multilayer 2D NPR materials through 3D chiral chains are proposed. The sign of the Poisson's ratio depends on the linkage pattern of the 3D chiral chain. Based on this method, 11 types of novel 3D NPR and PPR materials are presented. Experimental and numerical methods are adopted to study the mechanical properties of the proposed novel 3D NPR and PPR materials. Results show that the novel 3D materials present desirable NPR and PPR as we expected, which proved the effectiveness of the proposed design method.
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