2024
DOI: 10.1177/10996362241302975
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Gradient 2D re-entrant cores for sandwich structures under low-velocity impact

Melikasadat Alavi,
Reza Hedayati,
Mojtaba Sadighi

Abstract: Auxetic metamaterials, known for their unusual properties, are being explored as cores for sandwich structures to improve impact resistance. This study investigated the low-velocity impact response of sandwich panels with various core designs using finite element method (FEM) and experiments on 3D-printed specimens. These cores include pure honeycomb, pure auxetic, and gradient variations with controlled gradients of Poisson’s ratio, transitioning from negative to positive (NTP), positive to negative (PTN), ne… Show more

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