Unveiling the mechanics of micro-LPBF manufactured hierarchical composites: a novel FE2-nested homogenisation approach
Multi-level periodicity is a ubiquitous structural feature of natural composites. Conventional homogenisation techniques can effectively address the mechanism of uniform periodic structures, while encountering challenges in efficiently characterising the performance of multi-scale hierarchical struc...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
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| Series: | Virtual and Physical Prototyping |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2025.2456693 |
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| Summary: | Multi-level periodicity is a ubiquitous structural feature of natural composites. Conventional homogenisation techniques can effectively address the mechanism of uniform periodic structures, while encountering challenges in efficiently characterising the performance of multi-scale hierarchical structures. This study presents an FE2 (Finite Element Square)-nested homogenisation elastic-calculating method, integrating RVE-based homogenisation for primary periodicity and nested Direct FE2 for secondary periodicity. Harnessing micro-LPBF process, specimens with multi-level periodicity are fabricated. The high-precision manufacturing is integral for unlocking the design potential of macro–micro hierarchical material, allowing for the creation of components with intricate multi-scale features. Mechanical testing of specimens validates the accuracy of FE2-nested homogenisation method, demonstrating its effectiveness in predicting the elastic responses of multi-level periodic structures. Furthermore, the FE2-nested method is employed to elucidate the macro–micro interaction mechanisms. It underscores potential to drive innovations in hierarchical composite material, providing a method basis for mechanical customisation and enhancement of complex multi-level design. |
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| ISSN: | 1745-2759 1745-2767 |