Achieving efficiency and accuracy through kinematic integrity: a novel approach to metamaterial modelling
Abstract: Additively manufactured lattice structures pose a challenge when it comes to simulation. The presence of imperfections such as porosity, surface roughness, dimensional inaccuracies, and heterogeneity has an impact on the mechanical properties of structures. This work presents a novel phenomenological approach to achieve efficient and accurate simulations of metamaterials. The technique recognises the alteration in structural behaviour that results from manufacturing imperfections, irrespective of the specific composition of the underlying material. Through the concurrent replication of force progression and structural deformation, the approach ensures kinematic consistency while minimising computational expenses and maintaining accuracy. Response Surface Methodology (RSM) is used for calibration in conjunction with nodal displacements and experimental force/displacement data. Displacement data is obtained via global Digital Image Correlation (DIC) and Digital Volume Correlation (DVC). Measuring the displacement fields via Finite Element based DIC/DVC yields the true local deformation of the structure. The technique is demonstrated through the creation of a numerical model for a two-dimensional and three-dimensional anti-tetrachiral,auxetic structure. The work discusses the transferability, accuracy and limitations of the method
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Notes
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Universität Freiburg, Dissertation, 2024
- Keyword
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Computersimulation
Finite-Elemente-Methode
Prozesssimulation
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
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Universität
- (when)
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2024
- Creator
- DOI
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10.6094/UNIFR/255670
- URN
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urn:nbn:de:bsz:25-freidok-2556708
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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25.03.2025, 1:49 PM CET
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
Time of origin
- 2024
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