Dear Colleagues,

Mechanical metamaterials are artificial materials with rationally designed microstructures to achieve unusual static mechanical properties (e.g., ultralight, negative Poisson’s ratio, negative thermal expansion, anisotropic stiffness, pentamode, multistability) and dynamic behaviors (e.g., selective wave transmission, full-band vibration isolation, impact energy mitigation). Versatile mechanical metamaterial designs inspired by natural materials (such as honeycomb and wood), crystalline structures, and paper folding and/or cutting principles have been proposed. The development of advanced 3D and 4D manufacturing techniques enables the design and fabrication of mechanical metamaterials with complex unit cell geometries, micro- to nanoscales, and a wide range of engineering materials. In this Special Issue, we invite high-quality review and research articles that will contribute valuable knowledge to this thriving field. The scope of this Special Issue includes but not limited to:

• Mechanical metamaterials using novel microstructure design principles;
• Mechanical metamaterials showing intriguing static mechanical properties;
• Mechanical metamaterials showing intriguing dynamic behaviors;
• Mechanical metamaterials showing intriguing acoustics behaviors;
• Reconfigurable elastic metamaterials with programmable properties;
• Manufacturing and experiment techniques of mechanical metamaterials;
• Novel applications of mechanical metamaterials.

Dr. Xiang Zhou
Dr. George Kenanakis
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

• mechanical metamaterial
• microstructural design
• static mechanical properties
• dynamic behaviors
• acoustic behaviors
• reconfigurable elastic metamaterial