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- W4205514028 abstract "Mechanical metamaterials with two-phase lattice structures have recently been explored to enhance the mechanical properties of the constituent lattices. In this work, novel dual-phase lattice structures, named as ‘multilattice’ structures, are designed and fabricated by mimicking particle and fiber reinforced composite materials. The 3D reentrant auxetic lattice, that exhibits negative Poisson’s ratio, is used as the matrix and body-centered-tetragonal lattice with vertical struts (BCTZ), having high stiffness and high strength, is used as reinforcements. The mechanical response and deformation mechanics of the multilattice structures are investigated by numerical simulations and quasi-static compression tests. Due to the presence of BCTZ reinforcements, the multilattice structures exhibit superior strength and stiffness than the parent 3D reentrant lattice without compromising the negative Poisson’s ratio behavior. Moreover, the influence of volume fraction and type of the reinforcements on the mechanical properties of the multilattice structures are also studied. The multilattice structures exhibit higher densification strain and post yield hardening that lead to higher energy absorption than the parent auxetic lattice. Elastic moduli and Poisson’s ratios of the multilattice structures are in good agreement with the predictions obtained from the conventional rule of mixture used for composite materials. This study suggests that the strength, stiffness, energy absorption and Poisson’s ratio of multilattice structures can be tailored as per the requirement of load bearing applications and energy absorbing applications. The continuous fiber-reinforced multilattice (CFRM) can be useful for high strength structures while the particle-reinforced multilattice (PRM) is more appropriate for high energy-absorbing structures." @default.
- W4205514028 created "2022-01-25" @default.
- W4205514028 creator A5062161247 @default.
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- W4205514028 date "2022-03-01" @default.
- W4205514028 modified "2023-10-07" @default.
- W4205514028 title "Composite-inspired multilattice metamaterial structure: An auxetic lattice design with improved strength and energy absorption" @default.
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- W4205514028 doi "https://doi.org/10.1016/j.mtcomm.2022.103159" @default.
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