TY - JOUR
T1 - Harnessing pattern transformation of honeycomb structures for soft actuators design
AU - Xie, Feng
AU - Hou, Xiuhui
AU - Sheng, Tianhao
AU - Li, Rui
AU - Deng, Zichen
N1 - Publisher Copyright:
© 2025 Elsevier Ltd
PY - 2025/4/15
Y1 - 2025/4/15
N2 - Periodic elastic perforated plate materials undergo pattern transformation when subjected to uniaxial compressive load exceeding a threshold. However, for some of the conventional regular honeycomb structures, the pattern transformation characterized by local buckling is not the primary deformation pattern. This situation can be changed by tuning the nodes of the honeycomb structure. The pattern transformation is successfully realized in square, rhombic and hexagonal honeycombs (y-direction) by enlarging the nodes, together with the transition of the Poisson's ratio from positive to negative. Additionally, increasing the size of the nodes also significantly enhances the stiffness, where the Young's modulus of the rhombic and hexagonal honeycombs increases by 18.14 times and 19.30 times, respectively. The proposed bi-material honeycomb structure further explicates the conclusion that the pattern transformation is the result of the enhanced stiffness of the nodes. A hypothetical equivalent model is proposed to explain the effect of enlarging the nodes on pattern transformation of honeycomb structures, where larger nodes make the ligaments more susceptible to slight disturbances, leading to new deformation patterns. The pattern transformation behavior is further explored for the design of soft actuator, which is driven by uniaxial compressive load and combined with rigid components to achieve directional movement of the soft robots.
AB - Periodic elastic perforated plate materials undergo pattern transformation when subjected to uniaxial compressive load exceeding a threshold. However, for some of the conventional regular honeycomb structures, the pattern transformation characterized by local buckling is not the primary deformation pattern. This situation can be changed by tuning the nodes of the honeycomb structure. The pattern transformation is successfully realized in square, rhombic and hexagonal honeycombs (y-direction) by enlarging the nodes, together with the transition of the Poisson's ratio from positive to negative. Additionally, increasing the size of the nodes also significantly enhances the stiffness, where the Young's modulus of the rhombic and hexagonal honeycombs increases by 18.14 times and 19.30 times, respectively. The proposed bi-material honeycomb structure further explicates the conclusion that the pattern transformation is the result of the enhanced stiffness of the nodes. A hypothetical equivalent model is proposed to explain the effect of enlarging the nodes on pattern transformation of honeycomb structures, where larger nodes make the ligaments more susceptible to slight disturbances, leading to new deformation patterns. The pattern transformation behavior is further explored for the design of soft actuator, which is driven by uniaxial compressive load and combined with rigid components to achieve directional movement of the soft robots.
KW - Honeycomb structure
KW - Pattern transformation
KW - Soft actuator
KW - Soft mechanical metamaterials
UR - http://www.scopus.com/inward/record.url?scp=85216762825&partnerID=8YFLogxK
U2 - 10.1016/j.compositesb.2025.112217
DO - 10.1016/j.compositesb.2025.112217
M3 - 文章
AN - SCOPUS:85216762825
SN - 1359-8368
VL - 295
JO - Composites Part B: Engineering
JF - Composites Part B: Engineering
M1 - 112217
ER -