Multiscale Analysis of Laminates Printed by 3D Printing Fused Deposition Modeling Method

Sheikh, Taha; Behdinan, Kamran

doi:10.1201/9781003158813-13

Cited by 6 publications

(8 citation statements)

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“…After undergoing FDM extrusion, layer-by-layer manufacturing forms a strong crosslinking between different layers of polymers. The crosslinking here refers to the chemical bond formed between the different layers of polymers in FDM parts during cooling (Attoye et al , 2019; El Moumen et al , 2019; Sheikh and Behdinan, 2022; Somireddy et al , 2018). Therefore, when tested using a simple static uniaxial tensile test, these structures behave as linear elastic.…”

Section: Methodsmentioning

confidence: 99%

“…Other models involve the combination of correlation between experimental data demands huge experimental test data. Multiscale models to capture the heterogeneity and anisotropy present in FDM parts were proposed to calculate the effective mechanical properties (Liu et al, 2022;Monaldo and Marfia, 2021;S anchez-Balanzar et al, 2022;Sheikh and Behdinan, 2022). Liu et al (Liu and Shapiro, 2016) proposed a two-scale homogenized model-based to investigate the effect of layer thickness and width.…”

Section: Introductionmentioning

confidence: 99%

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The effect of process parameters on the mechanical properties of additively manufactured parts using a hierarchical multiscale model

Sheikh

Behdinan

2022

RPJ

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Purpose This paper aims to present a hierarchical multiscale model to evaluate the effect of fused deposition modeling (FDM) process parameters on mechanical properties. Asymptotic homogenization mathematical theory is developed into two scales (micro and macro scales) to compute the effective elastic and shear modulus of the printed parts. Four parameters, namely, raster orientation, layer height, build orientation and porosity are studied. Design/methodology/approach The representative volume elements (RVEs) are generated by mimicking the microstructure of the printed parts. The RVEs subjected to periodic boundary conditions were solved using finite element. The experimental characterization according to ASTM D638 was conducted to validate the computational modeling results. Findings The computational model reports reduction (E1, ∼>38%) and (G12, ∼>50%) when porosity increased. The elastic modulus increases (1.31%–47.68%) increasing the orthotropic behavior in parts. Quasi-solids parts (100% infill) possess 10.71% voids. A reduction of 11.5% and 16.5% in elastic modulus with layer height is reported. In total, 45–450 oriented parts were highly orthotropic, and 0–00 parts were strongest. The order of parameters affecting the mechanical properties is porosity > layer height > raster orientation > build orientation. Originality/value This study adds value to the state-of-the-art terms of construction of RVEs using slicing software, discarding the necessity of image processing and study of porosity in FDM parts, reporting that the infill density is not the only measure of porosity in these parts.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of process parameters on the mechanical properties of additively manufactured parts using a hierarchical multiscale model

Sheikh

Behdinan

2022

RPJ

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“…Sheikh et al modelled and used a two-scale volume average homogenisation (VAM) and asymptotic homogenisation (AH) method to investigate neat polymers in the fused deposition modelling parts as laminated composites [22,23,93,161]. In another study, Aslan et al [162,163] investigated neat polymers using a homogenisation technique.…”

Section: Discussion and Concluding Remarksmentioning

confidence: 99%

“…Strain sensors need high stretchability together with better electrical properties. The conventional polymers used in FDM, such as PLA, ABS, polyamide, etc., are not suitable because of their linear elastic behaviour [93]. Scientists have reported using polyurethanes (TPUs) because of their low elastic modulus and high strain.…”

Section: Carbon Nanotube Polymer Nanocompositementioning

confidence: 99%

Fused Deposition Modelling of Thermoplastic Polymer Nanocomposites: A Critical Review

Sheikh,

Behdinan

2024

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Fused deposition modelling (FDM) has attracted researchers’ interest in myriads of applications. The enhancement of its part using fillers to print nanocomposites is a cutting-edge domain of research. Industrial acceptance is still a challenge, and researchers are investigating different nanofillers and polymer matrix combinations to investigate FDM-printed nanocomposites. Carbon nanotubes, graphene, and cellulose are heavily studied nanofillers because of their astonishing properties, biocompatibility, and ability to tailor the final performance of the FDM-printed nanocomposite part. This work presents a comprehensive review of polymer nanocomposites based on these nanofillers. Important examples, case studies, and results are discussed and compared to elaborate the understanding of the processing of nanocomposites, filaments, printing, and the characterisation of these nanocomposites. A detailed and exhaustive discussion of the prospective computational models, with challenges and a future road map, is provided, enabling the scientific community to understand these nanocomposites and their FDM processing for wider industrial applications and acceptance.

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“…The other models required the use of image processing to capture the mesostructured feature along the microscale model to investigate the effect of voids, but the heavy cost and time limit its application (Garg and Bhattacharya, 2017). Multiscale models have been reported to characterize the FDM printed parts answering the challenges with previous models (Liu et al , 2022; Monaldo and Marfia, 2021; Sánchez-Balanzar et al , 2023; Sheikh and Behdinan, 2022b). Liu and Shapiro (2016) proposed a two-scale model constructing mesoscale geometries to capture the material distribution effect in FDM parts.…”

Section: Introductionmentioning

confidence: 99%

Geometric void-multiscale model for evaluating the effect of bead width and layer height on voids in FDM parts

Sheikh

Behdinan

2023

RPJ

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Purpose This paper aims to present a geometrical void model in conjunction with a multiscale method to evaluate the effect of interraster distance, bead (raster) width and layer height, on the voids concentration (volume) and subsequently calculate the final mechanical properties of the fused deposition modeling parts at constant infill. Design/methodology/approach A geometric model of the voids inside the representative volume element (RVE) is combined with a two-scale asymptotic homogenization method. The RVEs are subjected to periodic boundary conditions solved by finite element (FE) to calculate the effective mechanical properties of the corresponding RVEs. The results are validated with literature and experiments. Findings Bead width from 0.2 to 0.3 mm, reported a decrease of 25% and 24% void volume for a constant layer height (0.1 and 0.2 mm – 75% infill). It is reported that the void’s volume increased up to 14%, 32% and 36% for 75%, 50% and 25% infill by varying layer height (0.1–0.2 and 0.3 mm), respectively. For elastic modulus, 14%, 9% and 10% increase is reported when the void’s volume is decreased from 0.3 to 0.1 mm at a constant 75% infill density. The bead width and layer height have an inverse effect on voids volume. Originality/value This work brings values: a multiscale-geometric model capable of predicting the voids controllability by varying interraster distance, layer height and bead width. The idealized RVE generation slicer software and Solidworks save time and cost (<10 min, $0). The proposed model can effectively compute the mechanical properties together with the voids analysis.

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Multiscale Analysis of Laminates Printed by 3D Printing Fused Deposition Modeling Method

Cited by 6 publications

References 0 publications

The effect of process parameters on the mechanical properties of additively manufactured parts using a hierarchical multiscale model

The effect of process parameters on the mechanical properties of additively manufactured parts using a hierarchical multiscale model

Fused Deposition Modelling of Thermoplastic Polymer Nanocomposites: A Critical Review

Geometric void-multiscale model for evaluating the effect of bead width and layer height on voids in FDM parts

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