Browse > Article
http://dx.doi.org/10.7734/COSEIK.2017.30.4.275

Porous Structures with Negative Poisson's Ratio using Pattern Transformation Triggered by Deformation  

Oh, Myung-Hoon (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Choi, Myung-Jin (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Byun, Tauk (Department of Convergence Technology, Graduate School of Venture, Hoseo University)
Cho, Seonho (Department of Naval Architecture and Ocean Engineering, Seoul National University)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.30, no.4, 2017 , pp. 275-282 More about this Journal
Abstract
In this paper, using a pattern transformation triggered by deformation, we propose a porous structure that exhibits the characteristic of negative Poisson's ratio in both tension and compression. Due to the lack of torque for rotational motion of ligaments, the existing porous structure of circular holes shows positive Poisson's ratio under tension loading. Also, the porous structure of elliptic holes has a drawback of low durability due to stress concentration. Thus, we design curved ligaments to increase the rotational torque under tension and to alleviate the stress concentration such that strain energy is uniformly distributed in the whole structure. The developed structure possesses better stiffness and durability than the existing structures. It also exhibits the negative Poisson ratio in both compression and tension of 10% nominal strain. Through nonlinear finite element analysis, the performance of developed structure is compared with the existing structure of elliptic holes. The developed structure turns out to be significantly improved in terms of stiffness and durability.
Keywords
negative poisson's ratio; pattern transformation; porous structures; finite element analysis;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Ahn, S.H., Kim, M.G., Cho, S.H. (2010) Isogeometric Shape Design Optimization of Structures under Sress Constraints, J. Comput. Struct. Eng. Inst. Korea, 23(3), pp.275-281.
2 ANSYS version 5.7 - User's Manual, ANSYS Inc.
3 Bertoldi, K., Boyce, M.C., Deschanel, S., Prange, S.M., Mullin, T. (2008) Mechanics of Deformation-Triggered Pattern Transformations and Superelastic behavior in Periodic Elastomeric Structures, J. Mech. & Phys. Solids, 56, pp.2642-2668.   DOI
4 Bertoldi, K., Reis, P.M., Willshaw, Stephen, Mullin, T. (2010) Negative Poisson's Ratio behavior Induced by an Elastic Instability, Adv. Mater., 22, pp.361-366.   DOI
5 Gatt, R., Mizzi, L., Azzopardi, J.I., Azzopardi, K.M., Attard, D., Casha, A., Briffa, J., Grima J.N. (2015) Hierarchical Auxetic Mechanical Metamaterials, Scientific Reports, 5.
6 Pozniak, A.A., Wojciechowski, K.W., Grima, J.N., Mizzi, L. (2016) Planar Auxeticity from Elliptic Inclusions, Compos. Part B: Eng., 94, pp.379-388.   DOI
7 Lakes, R.S. (1987) Foam Structures with a Negative Poisson's Ratio, Sci., 235, pp.1038-1040.   DOI
8 Mase, G.T., Mase, G.E. (1999) Continuum Mechanics for Engineers, CRC Press.
9 Mullin, T., Deschanel, S., Bertoldi, K., Boyce, M.C. (2007) Pattern Transformation Triggered by Deformation, Phys. Rev. Lett., 99, 084301.   DOI
10 Shan, S., Kang, S.H., Zhao, Z., Fang, L., Bertoldi, K. (2015) Design of Planar Isotropic Negative Poisson's Ratio Structures, Extreme Mech. Lett., 4, pp.96-102.   DOI
11 Taylor, M., Francesconi, L., Gerendas, M., Shanian, A., Carson, C., Bertoldi, K. (2014) Low Porosity Metallic Periodic Structures with Negative Poisson's Ratio, Adv. Mater., 26, pp.2365-2370.   DOI