Phase-transforming and switchable metamaterials

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• 作者：Dian Yang^a ; ^b ; ¹ ; Lihua Jin^a ; ¹ ; Ramses V. Martinez^b ; Katia Bertoldi^a ; ^c ; George M. Whitesides^a ; ^c ; ^d ; ^{gwhitesides@gmwgroup.harvard.edu" class="auth_mail" title="E-mail the corresponding author} ; Zhigang Suo^a ; ^c ; ^{suo@seas.harvard.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Phase transition ; State switching ; Metamaterial ; Material science ; Soft matter
• 刊名：Extreme Mechanics Letters
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：6
• 期：Complete
• 页码：1-9
• 全文大小：3094 K

文摘

This 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.