| Original language | English |
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| Pages (from-to) | 254-263 |
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| Number of pages | 10 |
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| Journal | International Journal of Solids and Structures |
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| Volume | 141-142 |
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| Early online date | 23 Feb 2018 |
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| DOIs | |
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| Date | Accepted/In press - 19 Feb 2018 |
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| Date | E-pub ahead of print - 23 Feb 2018 |
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| Date | Published (current) - 1 Jun 2018 |
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| Additional links | |
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We present a lattice structure defined by patterns of slits that follow a rotational symmetry (chiral) configuration. The chiral pattern of the slits creates a series of hinges that produce deformation mechanisms for the lattice due to bending of the ribs, leading to a marginal negative Poisson’s ratio. The engineering constants are modelled using theoretical and numerical Finite Element simulations. The results are benchmarked with experimental data obtained from uniaxial and off-axis tensile tests, with an overall excellent agreement. The chiral hinge lattice is almost one order of magnitude more compliant than other configurations with patterned slits and - in contrast to other chiral micropolar media - exhibits an in-plane shear modulus that closely obeys the relation between Young’s modulus and Poisson’s ratio in homogeneous isotropic linear elastic materials.
- Chiral, Elasticity, Lattice, Metamaterial, Shear, Tension
http://orcid.org/0000-0002-5470-4834