Application of Nanomaterials in Modern Mechanical Engineering
Nanomaterials have emerged as a transformative enabler in modern mechanical engineering, offering substantial improvements in material performance, system efficiency, and functional integration beyond the limits of conventional materials. Owing to their nanoscale structural features, these materials exhibit unique mechanical, thermal, electrical, and tribological properties driven by size effects, surface dominance, and quantum confinement phenomena. This paper presents a comprehensive review of nanomaterials applied in key mechanical engineering domains, including structural mechanics, tribology, thermal systems, manufacturing, and energy conversion. Various classes of nanomaterials—such as carbon-based nanostructures, metallic and ceramic nanoparticles, and nanocomposites—are examined with respect to their functional roles in load-bearing components, wear-resistant coatings, heat-transfer media, and intelligent mechanical systems. A methodological framework combining experimental characterization, multiscale modeling, and performance benchmarking is proposed to evaluate nanomaterial-enhanced systems using indicators such as strength-to-weight ratio, fatigue life, friction coefficient, thermal conductivity, and durability. While significant gains in efficiency, lifespan, and energy performance are demonstrated, challenges related to scalability, manufacturing reliability, and environmental impact remain. The paper concludes by outlining future research directions, including AI-assisted material design, sustainable nanomanufacturing, and standardized validation frameworks.