TY - JOUR
T1 - Zero Poisson's ratio cellular structure for two-dimensional morphing applications
AU - Gong, Xiaobo
AU - Huang, Jian
AU - Scarpa, Fabrizio
AU - Liu, Yanju
AU - Leng, Jinsong
PY - 2015/12/15
Y1 - 2015/12/15
N2 - This work presents a novel zero Poisson's ratio (ZPR) honeycomb structure that can achieve deformations along two orthogonal directions and avoid the increase of effective stiffness in the morphing direction by the restraining the Poisson's effect in the non-morphing direction. Opposite to current ZPR honeycombs for one-dimensional wing morphing the proposed novel zero Poisson's ratio honeycomb configuration can perform two-dimensional deformation and present a cellular structure with smooth edges. Analytical models related to the uniaxial, in-plane shear and bounds of the out-of-plane (transverse) shear stiffnesses are derived and validated using the finite element techniques. The in-plane behavior of the honeycomb is investigated using a parametric analysis against the geometry of the unit cell, while the out-of-plane transverse stiffness is also evaluated vs. the gauge thickness of the cellular honeycomb structure panels. The theoretical and numerical models exhibit good agreement and show the potential of this novel ZPR configuration for morphing sandwich panel cores.
AB - This work presents a novel zero Poisson's ratio (ZPR) honeycomb structure that can achieve deformations along two orthogonal directions and avoid the increase of effective stiffness in the morphing direction by the restraining the Poisson's effect in the non-morphing direction. Opposite to current ZPR honeycombs for one-dimensional wing morphing the proposed novel zero Poisson's ratio honeycomb configuration can perform two-dimensional deformation and present a cellular structure with smooth edges. Analytical models related to the uniaxial, in-plane shear and bounds of the out-of-plane (transverse) shear stiffnesses are derived and validated using the finite element techniques. The in-plane behavior of the honeycomb is investigated using a parametric analysis against the geometry of the unit cell, while the out-of-plane transverse stiffness is also evaluated vs. the gauge thickness of the cellular honeycomb structure panels. The theoretical and numerical models exhibit good agreement and show the potential of this novel ZPR configuration for morphing sandwich panel cores.
KW - 2D morphing
KW - Cellular structure
KW - Elastic constants
KW - Zero Poisson's ratio
UR - http://www.scopus.com/inward/record.url?scp=84941038603&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2015.08.048
DO - 10.1016/j.compstruct.2015.08.048
M3 - Article (Academic Journal)
AN - SCOPUS:84941038603
SN - 0263-8223
VL - 134
SP - 384
EP - 392
JO - Composite Structures
JF - Composite Structures
ER -