Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization
Mechanical metamaterials are celebrated for their remarkable properties and advances in additive manufacturing, yet their damage tolerance in aerospace and other demanding environments remains underexplored despite their lightweight and high-strength design. This work proposes a novel approach to de...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524009213 |
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| author | Yukun Zheng Wenke Qiu Xuxi Liu Zhou Huang Liang Xia |
| author_facet | Yukun Zheng Wenke Qiu Xuxi Liu Zhou Huang Liang Xia |
| author_sort | Yukun Zheng |
| collection | DOAJ |
| description | Mechanical metamaterials are celebrated for their remarkable properties and advances in additive manufacturing, yet their damage tolerance in aerospace and other demanding environments remains underexplored despite their lightweight and high-strength design. This work proposes a novel approach to design damage-tolerant metamaterials using fail-safe topology optimization to ensure their mechanical performance remains resilient to local damages. The design strategy focuses on minimizing metamaterial’s weight while preserving its load-bearing capacity post-damage, with the effective bulk modulus used as a measure. To enhance performance under varying, complex, or uncertain loads, an isotropy constraint is incorporated into the design. The proposed method involves a trade-off where the metamaterial’s enhanced damage tolerance is achieved by slightly reducing the load-bearing capacity of the intact structure. By tuning structural redundancy, the method facilitates the development of lightweight, mechanically robust structures. Numerical simulations and experimental tests on three-point bending beam structures made from periodically ordered damage-tolerant metamaterials show that the proposed design maintains load-bearing capacity after damage while enhancing safety and reliability by preserving structural integrity and load transfer paths. |
| format | Article |
| id | doaj-art-bf7773db6a0a40779d647e8b42c7662b |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-bf7773db6a0a40779d647e8b42c7662b2025-01-09T06:12:22ZengElsevierMaterials & Design0264-12752025-01-01249113546Damage-tolerant mechanical metamaterials designed by fail-safe topology optimizationYukun Zheng0Wenke Qiu1Xuxi Liu2Zhou Huang3Liang Xia4State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaState Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, ChinaInstitute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, China; Corresponding authors.State Key Laboratory of Intelligent Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Corresponding authors.Mechanical metamaterials are celebrated for their remarkable properties and advances in additive manufacturing, yet their damage tolerance in aerospace and other demanding environments remains underexplored despite their lightweight and high-strength design. This work proposes a novel approach to design damage-tolerant metamaterials using fail-safe topology optimization to ensure their mechanical performance remains resilient to local damages. The design strategy focuses on minimizing metamaterial’s weight while preserving its load-bearing capacity post-damage, with the effective bulk modulus used as a measure. To enhance performance under varying, complex, or uncertain loads, an isotropy constraint is incorporated into the design. The proposed method involves a trade-off where the metamaterial’s enhanced damage tolerance is achieved by slightly reducing the load-bearing capacity of the intact structure. By tuning structural redundancy, the method facilitates the development of lightweight, mechanically robust structures. Numerical simulations and experimental tests on three-point bending beam structures made from periodically ordered damage-tolerant metamaterials show that the proposed design maintains load-bearing capacity after damage while enhancing safety and reliability by preserving structural integrity and load transfer paths.http://www.sciencedirect.com/science/article/pii/S0264127524009213Topology optimizationDamage-tolerant metamaterialsFail-safe designIsotropic mechanical behaviorAdditive manufacturing |
| spellingShingle | Yukun Zheng Wenke Qiu Xuxi Liu Zhou Huang Liang Xia Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization Materials & Design Topology optimization Damage-tolerant metamaterials Fail-safe design Isotropic mechanical behavior Additive manufacturing |
| title | Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization |
| title_full | Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization |
| title_fullStr | Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization |
| title_full_unstemmed | Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization |
| title_short | Damage-tolerant mechanical metamaterials designed by fail-safe topology optimization |
| title_sort | damage tolerant mechanical metamaterials designed by fail safe topology optimization |
| topic | Topology optimization Damage-tolerant metamaterials Fail-safe design Isotropic mechanical behavior Additive manufacturing |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524009213 |
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