TY - JOUR
T1 - Lightweight meta-lattice sandwich panels for remarkable vibration mitigation
T2 - Analytical prediction, numerical analysis and experimental validations
AU - Li, Hao
AU - Hu, Yabin
AU - Chen, Jianlin
AU - Shou, Dahua
AU - Li, Bing
N1 - Funding Information:
The authors acknowledge the financial support from the National Natural Science Foundation of China (NSFC) (Grant No. 12272298 and 11902262 ), the fundamental Research Funds for the Central Universities (No. G2022KY0605 ), the PolyU (UGC) Endowed Young Scholars Scheme (84CC) and PolyU (UGC) RI-IWEAR Seed Project ( P0038694 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/12
Y1 - 2022/12
N2 - Realizing superior mechanical performance and outstanding multifunction features, yet with lightweight configuration, simultaneously, has been always a fundamental challenge. Here we design and experimentally achieve an ultralight framework of lattice-truss-core sandwich panels, namely meta-lattice structure, for highly-efficient, broadband low-frequency vibration attenuation. A composite meta-lattice sandwich panel is proposed and integrally fabricated with glass fiber reinforced Nylon by the 3D printing technique of selective laser sintering. Requiring neither heavy local-resonators nor soft damping support, the designed meta-lattice structure can generate a wide low-frequency bandgap, where the bandwidth has a remarkable double-time increment, meanwhile the yield strength has a significant improvement. An analytical model based on Rayleigh-energy and Euler-Bernoulli beam theory is presented to tailor the bandgap characteristics. Without losing lightweight superiority, our meta-lattice prototype exhibits absolute advantages in broadband, low-frequency vibration attenuation and high loading-bearing capacity, which offers a thriving avenue to the outstanding integration of structural strength and diverse-function performance.
AB - Realizing superior mechanical performance and outstanding multifunction features, yet with lightweight configuration, simultaneously, has been always a fundamental challenge. Here we design and experimentally achieve an ultralight framework of lattice-truss-core sandwich panels, namely meta-lattice structure, for highly-efficient, broadband low-frequency vibration attenuation. A composite meta-lattice sandwich panel is proposed and integrally fabricated with glass fiber reinforced Nylon by the 3D printing technique of selective laser sintering. Requiring neither heavy local-resonators nor soft damping support, the designed meta-lattice structure can generate a wide low-frequency bandgap, where the bandwidth has a remarkable double-time increment, meanwhile the yield strength has a significant improvement. An analytical model based on Rayleigh-energy and Euler-Bernoulli beam theory is presented to tailor the bandgap characteristics. Without losing lightweight superiority, our meta-lattice prototype exhibits absolute advantages in broadband, low-frequency vibration attenuation and high loading-bearing capacity, which offers a thriving avenue to the outstanding integration of structural strength and diverse-function performance.
KW - A. Sandwich structure
KW - B. Vibration
KW - C. Analytical modelling
KW - E. 3-D Printing
UR - http://www.scopus.com/inward/record.url?scp=85138765750&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2022.107218
DO - 10.1016/j.compositesa.2022.107218
M3 - Journal article
AN - SCOPUS:85138765750
SN - 1359-835X
VL - 163
JO - Composites - Part A: Applied Science and Manufacturing
JF - Composites - Part A: Applied Science and Manufacturing
M1 - 107218
ER -