The mechanical behaviour of polylactic acid (PLA) samples printed via material extrusion is experimentally and numerically addressed. An experimental program comprising tensile and three-point bending tests is carried out. Some filament printing orientations and different values of flow rate percentage are considered and their influence on the mechanical performance is investigated. From a numerical point of view, a new two-level model for the multiscale analysis is considered. The macroscopic structural behaviour of the 3D printed component is described with a laminate finite element model based on the first-order shear deformation theory. Each layer of the laminate is described with an elasto-plastic constitutive law and the geometrical and mechanical properties are derived from the experimental results. The micromechanical analysis is conducted only when inelastic strain occurs performing a non-linear analytical homogenization technique based on the Transformation Field Analysis. The obtained numerical results are compared with the experimental results highlighting the effectiveness of the proposed modelling approach.

Monaldo, E., Ricci, M., Marfia, S. (2023). Mechanical properties of 3D printed polylactic acid elements: Experimental and numerical insights. MECHANICS OF MATERIALS, 177, 104551 [10.1016/j.mechmat.2022.104551].

Mechanical properties of 3D printed polylactic acid elements: Experimental and numerical insights

Monaldo, E;Ricci, M
;
Marfia, S
2023-01-01

Abstract

The mechanical behaviour of polylactic acid (PLA) samples printed via material extrusion is experimentally and numerically addressed. An experimental program comprising tensile and three-point bending tests is carried out. Some filament printing orientations and different values of flow rate percentage are considered and their influence on the mechanical performance is investigated. From a numerical point of view, a new two-level model for the multiscale analysis is considered. The macroscopic structural behaviour of the 3D printed component is described with a laminate finite element model based on the first-order shear deformation theory. Each layer of the laminate is described with an elasto-plastic constitutive law and the geometrical and mechanical properties are derived from the experimental results. The micromechanical analysis is conducted only when inelastic strain occurs performing a non-linear analytical homogenization technique based on the Transformation Field Analysis. The obtained numerical results are compared with the experimental results highlighting the effectiveness of the proposed modelling approach.
2023
Monaldo, E., Ricci, M., Marfia, S. (2023). Mechanical properties of 3D printed polylactic acid elements: Experimental and numerical insights. MECHANICS OF MATERIALS, 177, 104551 [10.1016/j.mechmat.2022.104551].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/433887
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