Modeling and optimization of flexural properties of FDM-processed PET-G specimens using RSM and GWO algorithm

Fountas, Nikolaos A.; Papantoniou, Ioannis; Kechagias, John; Manolakos, D.E.; Vaxevanidis, Nikolaos M.

doi:10.1016/j.engfailanal.2022.106340

Cited by 61 publications

(11 citation statements)

References 22 publications

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“… Selected parameters Levels Fixed parameters Low Middle High Layer thickness (mm) 0.1 0.15 0.2 Infill pattern Zig-Zag pattern (based on recommendations by Yeoh et al 15 where authors compared multiple patterns against mechanical properties) Printing speed (mm/s) 50 60 70 Infill density (%) 100 (based on recommendations by Kechagias et al 24 . Also Fountas et al 25 found superior flexural strength) Printing temperature (°C) 195 200 205 Bed temperature (°C) 60 (based on recommendations by Silva et al 26 ) …”

Section: Materials Extrusion (Mex) and The Parametersmentioning

confidence: 99%

Achieving effective interlayer bonding of PLA parts during the material extrusion process with enhanced mechanical properties

Kumar

Farooq

Ross

et al. 2023

Sci Rep

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The additive manufacturing technique of material extrusion has challenge of excessive process defects and not achieving the desired mechanical properties. The industry is trying to develop certification to better control variations in mechanical attributes. The current study is a progress towards understanding the evolution of processing defects and the correlation of mechanical behavior with the process parameters. Modeling of the 3D printing process parameters such as layer thickness, printing speed, and printing temperature is carried out through L27 orthogonal array using Taguchi approach. In addition, CRITIC embedded WASPAS is adopted to optimize the parts' mechanical attributes and overcome the defects. Flexural and tensile poly-lactic acid specimens are printed according to ASTM standards D790 and D638, respectively, and thoroughly analyzed based on the surface morphological analysis to characterize defects. The parametric significance analysis is carried out to explore process science where the layer thickness, print speed, and temperature significantly control the quality and strength of the parts. Mathematical optimization results based on composite desirability show that layer thickness of 0.1 mm, printing speed of 60 mm/s, and printing temperature of 200 °C produce significantly desirable results. The validation experiments yielded the maximum flexural strength of 78.52 MPa, the maximum ultimate tensile strength of 45.52 MPa, and maximum impact strength of 6.21 kJ/m2. It is established that multiple fused layers restricted the propagation of cracks with minimum thickness due to enhanced diffusion between the layers.

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Section: Materials Extrusion (Mex) and The Parametersmentioning

confidence: 99%

Achieving effective interlayer bonding of PLA parts during the material extrusion process with enhanced mechanical properties

Kumar

Farooq

Ross

et al. 2023

Sci Rep

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“…The wolf group is divided into four social classes from high to low according to the fitness function: α wolf, β wolf, δ wolf, and ω wolf. Wolf hunting is divided into three processes: siege, hunting, and attacking [24], [25]. In the optimization process, the distance between the grey wolf individual and the prey is shown in Eq.…”

Section: Gwo Algorithmmentioning

confidence: 99%

A novel method for determining the stress-strain constitutive relationship of high-grade pipeline weld zone material

Zhang

Liu

Kong

et al. 2022

Preprint

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As a typical welding structure, the girth weld of high-grade pipelines has obvious heterogeneity. Therefore, the axial mechanical properties of girth weld materials cannot be accurately tested, and the safety evaluation of the girth weld of the pipeline is seriously affected. Based on MATLAB-PYTHON-ABAQUS co-simulation, an optimization inversion method of the material stress-strain constitutive relationship in the weld zone of the high-grade pipeline is proposed in this paper. Four groups of uniaxial tensile tests with different notch sizes are carried out, and the load-displacement curves of each specimen are obtained. The true stress-strain constitutive relationship of the weld zone material is obtained by the Bayesian regularization back propagation (BRBP) neural network and the Grey wolf optimizer (GWO). The accuracy of the constitutive relationship is fully verified by the test data, and the relative error is less than 1%. In addition, taking the weld material of the oil and gas pipeline as an example, this paper proposes a universal design method of specimen size with a notch. The proposed method is convenient for researchers in different fields to measure the stress-strain constitutive relationship of different materials. It is worth mentioning that the inversion method proposed in this paper is also applicable to the measurement of the stress-strain constitutive relationship of homogeneous metallic materials in a large strain range. The proposed inversion method can provide an accurate stress-strain constitutive relationship for the safety evaluation of girth welds of high-grade pipelines.

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“…[7] A detailed discussion of FDM sustainability, its quality issues, and flexural and surface texture issues observed in 3D printed gears and tools with acceptable flexural and surface texture properties can be found in references. [8][9][10] For example, the sustainability of low-cost 3D printed parts requires consideration of energy consumption, quality metrics, time, quality, and flexibility. Careful choices must be made during the pre-production phase to ensure viability and sustainability.…”

Section: Introductionmentioning

confidence: 99%

“…Surface roughness, printing time, shape quality, and surface hardness were reported for the optimized implant. In another investigation, [10] FDM-related parameters are important for 3D-printed components, and researchers investigated the effect of these parameters on the flexural strength of PET-G. GWO (Grey Wolf algorithm) was used to suggest a good combination of parameter settings to maintain good flexural strength with a gain of 15%. GWO was used to suggest a good combination of parameter settings to maintain good flexural strength with an enhancement of 15%.…”

Section: Introductionmentioning

confidence: 99%

Glass Fiber Reinforced Acrylonitrile Butadiene Styrene Composite Gears by FDM 3D Printing

Bodaghi

Sadooghi

Bakhshi³

et al. 2023

Adv Materials Inter

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Abstract3D printing of gears via fused deposition modeling (FDM) has been recently introduced as a low‐cost efficient manufacturing method. Different materials have been 3D printed and Acrylonitrile Butadiene Styrene (ABS) with excellent mechanical properties has been found to be promising. However, 3D printed ABS gears possess a high level of abrasion rate. This paper introduces a new class of ABS‐based gears reinforced by different amounts of milled E‐glass fibers and 3D printed by FDM with acceptable thermo‐mechanical properties and performance. A set of thermo‐mechanical tests is carried out to provide an insight into the influence of adding glass fibers on the glass transition temperature (Tg), hardness and teeth bending strength, teeth failure force, weight lost, abrasion resistance, mechanical wear, and performance of composite gears. The mechanical behaviors of driving and driven gears are examined in high and room temperatures with or without lubrication. Microstructure and gear profile analysis of 3D printed layers, worn surfaces, and fracture locations are also conducted by SEM images and profile projector. The newly developed glass fiber reinforced ABS gears reveal a high level of thermo‐mechanical performance in terms of hardness, mechanical strength, bending force, abrasion and wear resistance compared to pure 3D printed ABS gears.

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Modeling and optimization of flexural properties of FDM-processed PET-G specimens using RSM and GWO algorithm

Cited by 61 publications

References 22 publications

Achieving effective interlayer bonding of PLA parts during the material extrusion process with enhanced mechanical properties

Achieving effective interlayer bonding of PLA parts during the material extrusion process with enhanced mechanical properties

A novel method for determining the stress-strain constitutive relationship of high-grade pipeline weld zone material

Glass Fiber Reinforced Acrylonitrile Butadiene Styrene Composite Gears by FDM 3D Printing

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