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Design of multi-material structures using material jetting technology: Topology optimisation, numerical analysis and experiments

Article dans une revue avec comité de lecture
Author
ccMONTEMURRO, Marco
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ALAIMO, Gianluca
242500 Dipartimento di Ingegneria Civile e Architettura = Department of Civil Engineering and Architecture [Univ Pavia] [DICAr UNIPV]
ccPANETTIERI, Enrico
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ccCATAPANO, Anita
1002421 Institut de Mécanique et d'Ingénierie [I2M]
CARRATURO, Massimo
AURICCHIO, Ferdinando

URI
http://hdl.handle.net/10985/25756
DOI
10.1016/j.compstruct.2023.117838
Date
2024-02
Journal
Composite Structures

Abstract

This paper presents a thorough experimental/numerical validation of optimised multi-material structures fabricated by material jetting technology. The proposed methodology uses, on the one hand, non uniform rational basis spline (NURBS) entities to represent the geometric descriptor associated with each material phase constituting the continuum and, on the other hand, a general multi-phase material interpolation scheme to penalise the stiffness tensor of the structure. Two design requirements are included in the problem formulation: the lightness and the minimum length scale of each material phase. The influence of the integer parameters intervening in the definition of the NURBS entity and the influence of different combinations of material phases on the optimised solutions are investigated. The proposed approach is applied to 2D and 3D benchmark structures subjected to prescribed displacements representative of a three-point bending test. Based on the result of the topology optimisation process one of the optimised solutions, balancing the requirements of structural stiffness, lightness, and manufacturing constraints, is selected, manufactured and tested. A comparison between experimental and numerical results (obtained by non-linear analyses) is carried out to show the effectiveness of the approach.

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