Metamaterials with Enhanced Thermal-Mechanical Properties

Abstract

Metamaterials are artificially engineered materials which derive their unusual properties mainly from their structure rather than composition. In recent years, researchers are giving more attention on metamaterials that can show superior thermal and mechanical performance simultaneously. Such materials are very useful in aerospace, automotive, electronics cooling, civil structures and defense applications where both strength and heat management is required. This paper presents a detailed review on different types of metamaterials which are designed for enhanced thermal-mechanical properties. The paper discusses
design principles, lattice architecture, auxetic behavior, phononic and thermal metamaterials, fabrication techniques and applications. Special focus is given on how geometric structuring at micro and meso scale can improve stiffness, strength, thermal conductivity and energy absorption. Tables and figures are included to summarize important findings. Some challenges and future scope are also discussed.

KEYWORDS: Metamaterials, Thermal conductivity, Mechanical strength,
Auxetic structures, Lattice design, Phononic materials, Additive manufacturing, Thermal management.