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Open AccessArticle

Tensile Mechanical Behaviour of Multi-Polymer Sandwich Structures via Fused Deposition Modelling

Laboratory of Intelligent Manufacturing, Design, and Automation (LIMDA), Department of Mechanical Engineering, University of Alberta, 9211 116 St NW, Edmonton, AB T6G 1H9, Canada
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Polymers 2020, 12(3), 651; https://doi.org/10.3390/polym12030651
Received: 18 February 2020 / Revised: 9 March 2020 / Accepted: 10 March 2020 / Published: 12 March 2020
(This article belongs to the Special Issue Bio-Based Polymers: Synthesis and Properties)
The application of single homogeneous materials produced through the fused deposition modelling (FDM) technology restricts the production of high-level multi-material components. The fabrication of a sandwich-structured specimen with different material combinations using conventional thermoplastics such as poly (lactic acid) (PLA), acrylonitrile butadiene styrene (ABS) and high impact polystyrene (HIPS) through the filament-based extrusion process can demonstrate an improvement on its properties. This paper aims to assess among these materials, the best material sandwich-structured arrangement design, to enhance the mechanical properties of a part and to compare the results with the homogeneous materials selected. The samples were subjected to tensile testing to identify the tensile strength, elongation at break and Young’s modulus of each material combination. The experimental results demonstrate that applying the PLA-ABS-PLA sandwich arrangement leads to the best mechanical properties between these materials. This study enables users to consider sandwich structure designs as an alternative to manufacturing multi-material components using conventional and low-cost materials. Future work will consider the flexural tests to identify the maximum stresses and bending forces under pressure. View Full-Text
Keywords: additive manufacturing; fused deposition modelling; multi-material 3D printing; sandwich structure additive manufacturing; fused deposition modelling; multi-material 3D printing; sandwich structure
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Baca Lopez, D.M.; Ahmad, R. Tensile Mechanical Behaviour of Multi-Polymer Sandwich Structures via Fused Deposition Modelling. Polymers 2020, 12, 651.

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