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2021 | OriginalPaper | Chapter

Manufacturing Variability of 3D Printed Broadband Multi-frequency Metastructure

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Abstract

Additive manufacturing has been used to propose several designs of phononic crystals and metamaterials due to the low cost to produce complex geometrical features. However, like any other manufacturing process, it can introduce material and geometrical variability in the nominal design and therefore can affect the structural dynamic performance. Locally resonant metamaterials are typically designed such that the distributed resonators have the same natural frequency or, in the case of rainbow metastructures, a well-defined spatial profile. In this work, manufacturing tolerances of beam samples produced from a Selective Laser Sintering process are assessed and variability levels are used to investigate the vibration suppression performance of broadband multi-frequency metastructures. Evenly spaced non-symmetric resonators are attached to a beam with U-shaped cross-section and partitioned by parallel baffled plates. An analytical model based on a transfer matrix approach is used to calculate transfer receptance due to a point time harmonic force. Moreover, a random field model is assumed based in previous experimental results and the effects of the correlation length, a measure of the spatial fluctuation, are also investigated for individual. The obtained results are expected to be useful for further robust design in mass produced industrial applications.

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Metadata
Title
Manufacturing Variability of 3D Printed Broadband Multi-frequency Metastructure
Authors
Adriano T. Fabro
Han Meng
Dimitrios Chronopoulos
Copyright Year
2021
DOI
https://doi.org/10.1007/978-3-030-53669-5_15