Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness
Inspired by the strengthening mechanism of crystal twinning boundary, this work proposes a novel strategy for lattice metamaterial design to improve stiffness, strength, and toughness. At the microscale, the inclination variable of unit-cell is introduced into the analytical formula of modulus in th...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-09-01
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| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S026412752200538X |
| _version_ | 1817999554862120960 |
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| author | Kanghui Song Dawei Li Tingting Liu Changdong Zhang Yi Min Xie Wenhe Liao |
| author_facet | Kanghui Song Dawei Li Tingting Liu Changdong Zhang Yi Min Xie Wenhe Liao |
| author_sort | Kanghui Song |
| collection | DOAJ |
| description | Inspired by the strengthening mechanism of crystal twinning boundary, this work proposes a novel strategy for lattice metamaterial design to improve stiffness, strength, and toughness. At the microscale, the inclination variable of unit-cell is introduced into the analytical formula of modulus in the compression direction. Then, the mechanical constitutive model of lattice structure with the inclination variable is established, which can be used to obtain the optimized inclination angle and maximize the stiffness in the compression direction. At the scale of periodic macro-array, to achieve the best mechanical properties in the compression direction without sacrificing the mechanical properties in the horizontal direction, twinning boundaries are introduced into both horizontal and vertical directions of the structure. Additionally, the mechanical properties of the structure can be further improved by controlling the number of twinning boundaries. The models are then fabricated through additive manufacturing and compressed. The experimental and simulation results show that the proposed method can simultaneously improve the stiffness, strength, and toughness of the lattice structure. For example, the stiffness of the optimized SC-BCC lattice structure is improved by 50.82%, the strength by 10.94%, and the energy absorption performance by 20.06% in the compression direction. |
| first_indexed | 2024-04-14T03:10:29Z |
| format | Article |
| id | doaj.art-7617287c953a4c3492b640bc98047921 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-14T03:10:29Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-7617287c953a4c3492b640bc980479212022-12-22T02:15:36ZengElsevierMaterials & Design0264-12752022-09-01221110916Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughnessKanghui Song0Dawei Li1Tingting Liu2Changdong Zhang3Yi Min Xie4Wenhe Liao5School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR ChinaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Corresponding authors.Centre for Innovative Structures and Materials, School of Engineering, RMIT University, Melbourne 3001, AustraliaSchool of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China; Corresponding authors.Inspired by the strengthening mechanism of crystal twinning boundary, this work proposes a novel strategy for lattice metamaterial design to improve stiffness, strength, and toughness. At the microscale, the inclination variable of unit-cell is introduced into the analytical formula of modulus in the compression direction. Then, the mechanical constitutive model of lattice structure with the inclination variable is established, which can be used to obtain the optimized inclination angle and maximize the stiffness in the compression direction. At the scale of periodic macro-array, to achieve the best mechanical properties in the compression direction without sacrificing the mechanical properties in the horizontal direction, twinning boundaries are introduced into both horizontal and vertical directions of the structure. Additionally, the mechanical properties of the structure can be further improved by controlling the number of twinning boundaries. The models are then fabricated through additive manufacturing and compressed. The experimental and simulation results show that the proposed method can simultaneously improve the stiffness, strength, and toughness of the lattice structure. For example, the stiffness of the optimized SC-BCC lattice structure is improved by 50.82%, the strength by 10.94%, and the energy absorption performance by 20.06% in the compression direction.http://www.sciencedirect.com/science/article/pii/S026412752200538XLattice metamaterial designCrystal twinning boundaryEnhanced strength, stiffness, and toughnessMulti-scale designNovel lattice |
| spellingShingle | Kanghui Song Dawei Li Tingting Liu Changdong Zhang Yi Min Xie Wenhe Liao Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness Materials & Design Lattice metamaterial design Crystal twinning boundary Enhanced strength, stiffness, and toughness Multi-scale design Novel lattice |
| title | Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness |
| title_full | Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness |
| title_fullStr | Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness |
| title_full_unstemmed | Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness |
| title_short | Crystal-twinning inspired lattice metamaterial for high stiffness, strength, and toughness |
| title_sort | crystal twinning inspired lattice metamaterial for high stiffness strength and toughness |
| topic | Lattice metamaterial design Crystal twinning boundary Enhanced strength, stiffness, and toughness Multi-scale design Novel lattice |
| url | http://www.sciencedirect.com/science/article/pii/S026412752200538X |
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