[SY-G2] Symposium G-2

[SY-G2] Multiscale Modeling and Design of High-Strength and Low-Density 3D-Archecticured Metamaterial Systems

^○Hussein M Zbib¹, Mehdi Hamid¹, Rahul Panat², Sadeq Saleh² (1.Washington State university, United States of America, 2.Carnegie Mellon University, United States of America)

Designing high energy-efficiency structural materials with superior mechanical properties is a key challenge for scientists and engineer. Among these properties, strength versus mass density and strength versus ductility are amongst the most important factors that affect component design, and thus structure weight. Ideal structural materials are the ones that may retain high strength with low mass density and excellent ductility. However, current state-of-the-art materials have a drastic tradeoff between these properties. In this work, a multiscale modeling approach is developed and used to design a new class of high-strength-ductility material system. It is shown that by integrating the effects of nanoparticle, nanolaminate and gradient structure on strength and ductility, it is possible to design and manufacture 3D-architectured lightweight metamaterial systems. The system is made of interconnected microscale metallic ligaments reinforced by nanolaminate metallic layers and have superior mechanical properties (strength-density, strength-ductility) compared to their bulk counterparts.