Dynamic mechanical and viscoelastic properties of glass fiber reinforced photopolymer composite fabricated using vat-photopolymerization additive technique: Influence of filler volume fraction

Moharana, Annada Prasad; Singh, Sarthak S.; Dixit, Amit Rai

doi:10.1016/j.jmapro.2024.08.067

Journal of Manufacturing Processes

2024

DOI: 10.1016/j.jmapro.2024.08.067

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Dynamic mechanical and viscoelastic properties of glass fiber reinforced photopolymer composite fabricated using vat-photopolymerization additive technique: Influence of filler volume fraction

Annada Prasad Moharana,

Sarthak S. Singh,

Amit Rai Dixit

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2024

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2-Dimensional strain mapping and post curing effects on viscoelastic properties of glass fiber infused photocurable composites prepared using Vat-photopolymerization process

Moharana,

Dixit

2024

RPJ

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Purpose The purpose of this study is to explore the effect of different post-curing times on the mechanical properties, specifically the visco-elastic characteristics, Poisson’s ratio and modulus, of three dimensional (3D) printed photopolymer composites (PPCs) reinforced with short glass fibres (SGF). Design/methodology/approach This research uses digital light processing-based Vat-photopolymerization process to 3D print PPCs reinforced with SGF at volume fractions of 2%, 4%, 6% and 8%. An inter-stage stirring process was used to reinforce the SGFs in a layer wise fashion. After printing, the parts undergo post-curing for 20, 60 and 100 min. The mechanical properties are then analyzed using dynamic mechanical analysis and in situ optical measurements. In addition, two-dimensional strain mapping from digital image correlation techniques is used to assess the structural behavior. Findings This study found that composites with 4% SGF reinforcement achieved the highest storage modulus, approximately 1,550 MPa, after 60 and 100 min of post-curing. In addition, the Poisson’s ratio of these composites increased from 0.2 to 0.41 with rising temperature. By applying Poisson’s ratio correction, the modulus was observed to be 1,800 MPa. These results indicate that optimal SGF content and post-curing times significantly enhance the mechanical properties of 3D-printed PPCs. Originality/value This research uniquely combines the reinforcement of photopolymers with SGFs at varying volume fractions and the detailed analysis of post-curing times to enhance the mechanical properties of 3D printed PPCs.

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2-Dimensional strain mapping and post curing effects on viscoelastic properties of glass fiber infused photocurable composites prepared using Vat-photopolymerization process

Moharana,

Dixit

2024

RPJ

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Dynamic mechanical and viscoelastic properties of glass fiber reinforced photopolymer composite fabricated using vat-photopolymerization additive technique: Influence of filler volume fraction

Cited by 1 publication

References 42 publications

2-Dimensional strain mapping and post curing effects on viscoelastic properties of glass fiber infused photocurable composites prepared using Vat-photopolymerization process

2-Dimensional strain mapping and post curing effects on viscoelastic properties of glass fiber infused photocurable composites prepared using Vat-photopolymerization process

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