Analysis of the Compression Behaviour of Reinforced Photocurable Materials Used in Additive Manufacturing Processes Based on a Mask Image Projection System.

Jordi Bonada,Jose Antonio Padilla,Miquel Casafont,Elena Xuriguera,Josep Maria Pons,Pol Barcelona

doi:10.3390/ma14164605

Jordi Bonada, Jose Antonio Padilla + Show 4 more

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https://doi.org/10.3390/ma14164605

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Abstract

Mask image projection based on stereolithography is an additive manufactured technology based on a Frontal Photopolymerization Process. Therefore, photocurable resins are used to build-up parts layer by layer. In this paper, alumina particles have been used as a reinforcement filler in order to improve the material stress-strain behaviour. In addition, the increment of the photoconversion ratio is a key factor to enhance the mechanical properties. Consequently, a numerical model has been used to determine the optimal printing parameters to enhance the elastic mechanical properties of printed parts according to the characteristics of photocurable materials. Stable and homogeneous reinforced materials have been obtained with an alumina content ranging from 5 to 15 wt%. Furthermore, the compression behaviour of reinforced materials has been analysed by means of experimental tests. The results show an enhancement of mechanical properties after the addition of reinforcement fillers, obtaining a maximum improvement in 10 wt% of solid load content. Finally, the influence of the sample’s orientation on the construction platform has been discussed.

Highlights

Mask image projection based on stereolithography is an additive manufactured technology based on a Frontal Photopolymerization Process
Mask image projection based on stereolithography (MIP-SL), known as digital light processing (DLP), is an additive manufacturing technology which uses a frontal photopolymerization process (FPP) to manufacture each material layer
The paper has presented an analysis of the stress-strain behaviour of compression samples manufactured by means of Mask Image Projection based on Stereolithography technology

Summary

Introduction

Mask image projection based on stereolithography (MIP-SL), known as digital light processing (DLP), is an additive manufacturing technology which uses a frontal photopolymerization process (FPP) to manufacture each material layer. This technology employs a digital micro device (DMD) to emit a controlled light energy dose on a photocurable resin to built-up the final part layer by layer [1,2]. MIP-SL process can have a higher manufacturing speed than stereolithography (SLA) due to the simultaneous energy delivery in each layer Both FPP technologies have a high resolution, which is one of their main characteristics. Optimized printing parameters can be calculated in order to enhance the mechanical properties of printed parts

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