TY - JOUR
T1 - Graded conventional-auxetic Kirigami sandwich structures
T2 - Flatwise compression and edgewise loading
AU - Hou, Yangqing
AU - Neville, Robin M
AU - Scarpa, Fabrizio
AU - Remillat, Chrystel D L
AU - Gu, B.
AU - Ruzzene, Massimo
PY - 2014/3/1
Y1 - 2014/3/1
N2 - The work describes the manufacturing and testing of graded conventional/auxetic honeycomb cores. The graded honeycombs are manufactured using Kevlar woven fabric/914epoxy prepreg using Kirigami techniques, which consist in a combination of Origami and ply-cut processes. The cores are used to manufacture sandwich panels for flatwise compression and edgewise loading. The compressive modulus and compressive strength of stabilized (sandwich) honeycombs are found to be higher than those of bare honeycombs, and with density-averaged properties enhanced compared to other sandwich panels offered in the market place. The modulus and strength of graded sandwich panel under quasi-static edgewise loading vary with different failure mode mechanisms, and offer also improvements towards available panels from open literature. Edgewise impact loading shows a strong directionality of the mechanical response. When the indenter impacts the auxetic portion of the graded core, the strong localization of the damage due to the negative Poisson’s ratio effect contains significantly the maximum dynamic displacement of the sandwich panel.
AB - The work describes the manufacturing and testing of graded conventional/auxetic honeycomb cores. The graded honeycombs are manufactured using Kevlar woven fabric/914epoxy prepreg using Kirigami techniques, which consist in a combination of Origami and ply-cut processes. The cores are used to manufacture sandwich panels for flatwise compression and edgewise loading. The compressive modulus and compressive strength of stabilized (sandwich) honeycombs are found to be higher than those of bare honeycombs, and with density-averaged properties enhanced compared to other sandwich panels offered in the market place. The modulus and strength of graded sandwich panel under quasi-static edgewise loading vary with different failure mode mechanisms, and offer also improvements towards available panels from open literature. Edgewise impact loading shows a strong directionality of the mechanical response. When the indenter impacts the auxetic portion of the graded core, the strong localization of the damage due to the negative Poisson’s ratio effect contains significantly the maximum dynamic displacement of the sandwich panel.
KW - Honeycomb
KW - Mechanical properties
KW - Impact behavior
KW - Assembly
UR - http://www.scopus.com/inward/record.url?scp=84890286502&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2013.10.084
DO - 10.1016/j.compositesb.2013.10.084
M3 - Article (Academic Journal)
AN - SCOPUS:84890286502
SN - 1359-8368
VL - 59
SP - 33
EP - 42
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
ER -