Journal
COMPOSITE STRUCTURES
Volume 280, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.114922
Keywords
Auxetic; Re-entrant honeycombs; Energy absorption; Foam-filled; Negative Poisson's ratio
Categories
Funding
- National Natural Science Foundation of China [51978330, 51778283]
- National Natural Sci-ence Foundation for the Youth of China [51808286]
- Natural Science Foundation of Jiangsu Province [BK20180710]
- Postgraduate Research & Practice Innovation Pro-gram of Jiangsu Province [KYCX20_1009]
Ask authors/readers for more resources
Filling slow recovery foam into re-entrant honeycombs can prevent lateral buckling, increase stiffness and energy absorption capacity, showing promising potential in protective engineering.
Auxetic materials have excellent mechanical properties, e.g., indentation resistance, shear resistance, fracture toughness and energy absorption. However, the stiffness of auxetics is normally lower than that of solid structures due to the existence of voids. In this study, to improve the mechanical properties of re-entrant honeycombs, a buffer material called slow recovery foam is filled into re-entrant honeycombs. The mechanical properties and deformation patterns of slow recovery foam-filled re-entrant honeycombs are investigated numerically and experimentally. Parametric studies are conducted to investigate the effects of geometrical parameters on the Poisson's ratio and energy absorption capacity. The results show that filling foam into re-entrant honeycombs will prevent lateral buckling of the structure. Compared with foam-filled hexagonal honeycombs, foam-filled reentrant honeycombs have higher stiffness. With the increase of the strain rates, the stiffness and energy absorption capacity of slow recovery foam-filled re-entrant honeycombs will increase. With the increase of cell wall thickness and the decrease of cell angle, the energy absorption capacity of slow recovery foam-filled re-entrant honeycombs will also increase. The results indicate that slow recovery foam-filled re-entrant honeycombs are promising in the field of protective engineering.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available