Intrinsically Polar Elastic Metamaterials
By Osama R. Bilal, Roman Susstrunk, Chiara Daraio, Sebastian D. Huber. 2017
83 citations recorded by the source corpus.
In many applications, one needs to combine materials with varying properties to achieve certain functionalities. For example, the inner layer of a helmet should be soft for cushioning while the outer shell should be rigid to provide protection. Over time, these combined materials either separate or wear and tear, risking the exposure of an undesired material property. This work presents a design principle for a material that gains unique properties from its 3D microstructure, consisting of repeating basic building blocks, rather than its material composition. The 3D printed specimens show, at two of its opposing faces along the same axis, different stiffness (i.e., soft on one face and hard on the other). The realized material is protected by design (i.e., topology) against cuts and tears: No matter how material is removed, either layer by layer, or in arbitrary cuts through the repeating building blocks, two opposing faces remain largely different in their mechanical response.
Subfields: Mechanical Engineering, Mechanics of Materials
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In Mechanical Engineering
In Mechanics of Materials
Citations in the corpus
- How to See Hidden Patterns in Metamaterials with Interpretable Machine Learning (2021, background): “Metamaterials can also exhibit highly non-standard elastic behavior such as auxeticity (negative Poisson’s ratio) [29], cloaking [8], significant anisotropy [5], and shear-normal coupling [20].”