| Fracture mechanics of bi-material lattice metamaterials | |
| Song, Zhaoqiang1; Wu, Kaijin2; Wang, Zewen2; He, Linghui2; Ni Y(倪勇)2,3 | |
| Corresponding Author | Song, Zhaoqiang([email protected]) ; Ni, Yong([email protected]) |
| Source Publication | JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
 |
| 2024-11-01 | |
| Volume | 192Pages:19 |
| ISSN | 0022-5096 |
| Abstract | The advent of additive manufacturing technology empowers precise control of multi-material components or specific defects in lightweight lattice metamaterials, however, fracture mechanics and toughening design strategies in such metamaterials remain enigmatic. By incorporating theoretical analysis, numerical simulation, and experimental investigation, our study reveals that stretch-bend synergistic strut deformations caused by bi-material components or topology defects contribute notably tougher lattice structures surpassing its ideal single-material lattices. A peak fracture energy at a critical modulus ratio was found in a designed bi-material lattice composed of triangular soft struts and hexagonal stiff struts, which originates from the shift of fracture modes at crack tip from strut bending to stretching dominated failure modes as the modulus of soft struts increases, where the compromise in competition between bending-enhanced and stretching-weakened energy dissipations of struts deformations results in the maximized fracture energy. A parametric design protocol was proposed to optimize fracture energy of bi-material lattices through tuning the modulus ratio and relative density. Furthermore, the concept of stretch-bend synergistic toughening can also be applied to make tougher single-material lattices with specific topological defects. Our findings not only provide physical insights into directing crack propagation but also provide quantitative guidance to optimize fracture resistance within low-density tough lattice metamaterials. |
| Keyword | Bi-material lattice metamaterials Fracture energy Toughening mechanism Stretch-bend synergism Additive manufacturing |
| DOI | 10.1016/j.jmps.2024.105835 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001315826400001 |
| WOS Keyword | DUCTILE TRANSITION ; BRITTLE |
| WOS Research Area | Materials Science ; Mechanics ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Mechanics ; Physics, Condensed Matter |
| Funding Project | National Key Research and Development Program of China[2022YFA1203602] ; National Natural Science Foundation of China[12025206] ; National Natural Science Foundation of China[12202433] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB0620101] ; USTC Research Funds of the Double First-Class Initiative[YD2090002010] |
| Funding Organization | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; USTC Research Funds of the Double First-Class Initiative |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Song, Zhaoqiang ; Ni, Yong |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96704 |
| Collection | 非线性力学国家重点实验室 |
| Affiliation | 1.Univ Calif San Diego, Dept Mech & Aerosp Engn, La Jolla, CA 92093 USA; 2.Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, Hefei 230026, Anhui, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Song, Zhaoqiang,Wu, Kaijin,Wang, Zewen,et al. Fracture mechanics of bi-material lattice metamaterials[J]. JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,2024,192:19.Rp_Au:Song, Zhaoqiang, Ni, Yong |
| APA | Song, Zhaoqiang,Wu, Kaijin,Wang, Zewen,He, Linghui,&倪勇.(2024).Fracture mechanics of bi-material lattice metamaterials.JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS,192,19. |
| MLA | Song, Zhaoqiang,et al."Fracture mechanics of bi-material lattice metamaterials".JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS 192(2024):19. |
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