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Imperfection-Enabled Strengthening of Ultra-Lightweight Lattice Materials.
Ding, Junhao; Ma, Qingping; Li, Xinwei; Zhang, Lei; Yang, Hang; Qu, Shuo; Wang, Michael Yu; Zhai, Wei; Gao, Huajian; Song, Xu.
Afiliación
  • Ding J; Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Sha Tin, Hong Kong, 999077, China.
  • Ma Q; Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Sha Tin, Hong Kong, 999077, China.
  • Li X; Faculty of Science, Agriculture, and Engineering, Newcastle University, Singapore, 567739, Singapore.
  • Zhang L; Meta Robotics Institute, Shanghai Jiao Tong University, Shanghai, 200240, China.
  • Yang H; State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China.
  • Qu S; Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore.
  • Wang MY; Department of Mechanical and Automation Engineering, Chinese University of Hong Kong, Sha Tin, Hong Kong, 999077, China.
  • Zhai W; School of Engineering, Great Bay University, Songshan Lake, Dongguan, Guangdong, 523808, China.
  • Gao H; Department of Mechanical Engineering, National University of Singapore, Singapore, 117575, Singapore.
  • Song X; Mechano-X Institute, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing, 100084, China.
Adv Sci (Weinh) ; : e2402727, 2024 Sep 16.
Article en En | MEDLINE | ID: mdl-39285656
ABSTRACT
Lattice materials are an emerging family of advanced engineering materials with unique advantages for lightweight applications. However, the mechanical behaviors of lattice materials at ultra-low relative densities are still not well understood, and this severely limits their lightweighting potential. Here, a high-precision micro-laser powder bed fusion technique is dveloped that enables the fabrication of metallic lattices with a relative density range much wider than existing studies. This technique allows to confirm that cubic lattices in compression undergo a yielding-to-buckling failure mode transition at low relative densities, and this transition fundamentally changes the usual strength ranking from plate > shell > truss at high relative densities to shell > plate > truss or shell > truss > plate at low relative densities. More importantly, it is shown that increasing bending energy ratio in the lattice through imperfections such as slightly-corrugated geometries can significantly enhance the stability and strength of lattice materials at ultra-low relative densities. This counterintuitive result suggests a new way for designing ultra-lightweight lattice materials at ultra-low relative densities.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Sci (Weinh) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania