2024-04-03 08:00:00
One of the most promising recent developments in materials science and engineering is the concept of exploiting “architecture” ─ the combination of topology and solid(s) distribution ─ as a means to generate materials with properties that are unattainable by traditional monolithic solids. Lightweight architected…
Lattice-based architected materials are gaining significant attention due to their open porosity and potential to offer multifunctional properties. Despite resembling truss-like networks, it has been shown that the geometry of the connections (joints) can play an important role in determining mechanical response. This potentially…
Lightweight architected materials, such as microlattices and foams, exhibit excellent energy absorption characteristics and are thus excellent candidates in protective structural components against impact or blast loads. It has been established that at a certain critical impact velocity, the compressive deformation of these material…
Heterogeneous structuring of ceramic composites has the potential to achieve properties and performances superior to their constituent materials, however they also come with a unique set of challenges. Among these are residual stresses that arise during processing due to the mismatch in thermal expansion…
Catastrophic brittle fracture is encountered in many engineering contexts, including transportation, infrastructure, and bio-medical devices, bringing with it significant societal costs. Now that tools such as 3D printers allow facile construction of structures with complex geometries and nearly arbitrary patterns, the potential exists for…
Desert sandgrouse, such as the Namaqua Sandgrouse, nest up to 30 km away from watering holes. Adult male desert sandgrouse have specially adapted feathers on their bellies that hold water, even during flight, allowing the birds to transport water back to the chicks at…
Natural architectures such as bone, bamboo, and nacre have long been a source of inspiration as engineers seek to design architected materials with robust failure characteristics. Much of the literature on the failure of cellular solids has focused on regular, periodic lattices. However, natural…
In this work, we present a multiscale model for architected lattices that captures material nonlinearities due to yield and plastic hardening, as well as geometric nonlinearities including buckling, post-buckling softening, and densification. We employ an FE^2 approach where the component-scale deformation is modeled by…
Metamaterials are artificial structures with unique overall properties not found in naturally occurring materials. Unusual properties of metamaterials can be tuned beyond the Bragg limit using local resonance. In this study, we used the Finite Element Method (FEM) to analyze the time domain response…
Cellular resonator-based mechanical metamaterial can be used to create media that efficiently absorb large impact loadings. Modelling arrays of these structures over time can be computationally intensive with traditional finite element analysis (FEA), as arrays of these metamaterials can contain large numbers of cells…
