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Multiscale lattices and composite materials: Optimal design, modeling and characterization

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About this Research Topic

The Research Topic on Multiscale Lattices and Composite Materials (MLCM) is focused on the design, modeling, control and testing of unconventional lattices and composite materials at different scales, which are optimally designed by controlling the architecture of the material.

A fundamental goal of ...

The Research Topic on Multiscale Lattices and Composite Materials (MLCM) is focused on the design, modeling, control and testing of unconventional lattices and composite materials at different scales, which are optimally designed by controlling the architecture of the material.

A fundamental goal of this topic is the study of mechanical metamaterials forming next-generation cellular solids; devices; novel composites; and also building-scale structures. Taking inspiration from peculiar behaviors at multiple scales exhibited by lattice materials and nano/micro-structures (e.g., tensegrity-type response, instability, fracture, plasticity and damage), MILCM will devote special attention on the creation of complex global systems (the metamaterials) with unprecedented mechanical properties. Such a goal is directly inspired by nature, where tensegrity concepts and hierarchical structures are ubiquitous and appear, e.g., in every cell, in the microstructure of the spider silk, and in the arrangement of bones and tendons for control of locomotion. MILCM also investigates the use of multiscale lattices, fullerenes, nanotubes, and carbon nanostructures to optimally design fabrics, fibers and coatings of groundbreaking reinforcements for novel composite materials. The covered modeling approaches will be able to predict the intrinsically complex mechanical behavior of the analyzed systems, which include: nonlinear homogenization techniques, multiscale methods for interacting failure modes, and/or mixed discrete-continuum methods.

The engineering implementation of the metamaterials analyzed by the MILCM topic will take inspiration and profit from the tunability of the mechanical response of tensegrity lattices through local and global prestress. The ability of such metamaterials to display tunable band gaps, where the propagation of mechanical waves is forbidden, eventually combined with internal resonance phenomena, will be investigated, with special focus on the design of next-generation waveguides, sound-proof layers, vibration-isolation devices, and seismic metamaterials. Engineering applications will also include advanced composites with enhanced interlaminar shear strength, and improved overall strength and fracture toughness, which are enriched with functionalized carbon nanotubes, as well as particles and fibers with structural hierarchy originating from their geometric design. Additionally, MILCM will focus on the formulation and implementation of quasi-real-time structural health monitoring systems dedicated to innovative materials and structures at different scales.

Nano-, micro- and macro-scale materials and devices are studied through a closed-loop approach including the design and modeling of physical model, and the optimal control of the key design variables. An experimental characterization phase implements and verifies the theoretical predictions.


Keywords: Mechanical metamaterials, Multiscale composites, Smart materials and structures, Vibration control, Structural health monitoring


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