Yang, DianJin, LihuaMartinez, RBertoldi, KatiaWhitesides, GeorgeSuo, Zhigang2017-02-152016Yang, Dian, Lihua Jin, Ramses V. Martinez, Katia Bertoldi, George M. Whitesides, and Zhigang Suo. 2016. Phase-Transforming and Switchable Metamaterials. Extreme Mechanics Letters 6: 1–9. doi:10.1016/j.eml.2015.11.004.2352-4316http://nrs.harvard.edu/urn-3:HUL.InstRepos:30353764This paper demonstrates a new soft structure that uses a meso- or macro-scale elastic instability to generate a shape-memory effect similar to that exhibited by a ferroelastic material. It demonstrates the phase transitions, state switching, and shape-memory effects in this system, both in experiment and in simulation. The new class of materials described in the paper is potentially useful, since it comprises what are effectively ‘‘shape-memory alloys’’ of arbitrarily low modulus and arbitrarily large remnant strain. The reproduction of properties of materials usually associated with atomic- or molecular-level changes in structure using meso-scale structural opens the door to development of new, soft materials with new properties and functions.en-USphase transitionstate switchingmetamaterialmaterial sciencesoft matterJournal Article2017-01-1120162017-02-1510.1016/j.eml.2015.11.004