The influence of stiffener geometry on flexural properties of 3D printed polylactic acid (PLA) beams

Gebrehiwot, Silas; Espinosa-Leal, Leonardo; Eickhoff, J. N.; Rechenberg, L.

doi:10.1007/s40964-020-00146-2

Cited by 23 publications

(12 citation statements)

References 12 publications

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“…It is clear from this figure that the mean deflection at break was raging between 8.39 mm obtained at Test number 3 and 13.85 mm achieved during the experiments of Test 4. These results were in agreement with the deflection at break reported in previous studies [24,25]. From the main effect plot for deflection at break shown in Figure 12, it is observed that the bending deflection at break will be maximal for velocity of 70 mm/s, extrusion temperature of 190 °C, and raster orientation of 0 degree.…”

Section: The Maximum Deflectionsupporting

confidence: 92%

Experimental analysis and optimization of mechanical properties of FDM-processed polylactic acid using Taguchi design of experiment

Abouelmajd

Bahlaoui

Arroub

et al. 2021

Int. J. Simul. Multidisci. Des. Optim.

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Fused deposition modeling (FDM) is one of the most used additive manufacturing processes in the current time. Predicting the impact of different 3D printing parameters on the quality of printed parts is one of the critical challenges facing researchers. The present paper aims to examine the effect of three FDM process parameters, namely deposition velocity, extrusion temperature, and raster orientation on the bending strength, stiffness, and deflection at break of polylactic acid (PLA) parts using Taguchi design of experiment technique. The results indicate that the temperature has the highest impact on the mechanical properties of PLA specimens followed by the velocity and the orientation. The optimum composition offering the best mechanical behavior was determined. The optimal predicted response was 159.78 N, 39.92 N/mm, and 12.55 mm for the bending strength, bending stiffness, and deflection at break, respectively. The R2 obtained from analysis of variance (ANOVA) showed good agreement between the experimental results and those predicted using a regression model.

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Section: The Maximum Deflectionsupporting

confidence: 92%

Experimental analysis and optimization of mechanical properties of FDM-processed polylactic acid using Taguchi design of experiment

Abouelmajd

Bahlaoui

Arroub

et al. 2021

Int. J. Simul. Multidisci. Des. Optim.

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“…In the study of Abouelmajd et al [ 73 ], they stated that the average error between the flexural strength values found between the experimental and FEA analysis was at the level of 5%. Gebrehiwot et al [ 74 ], on the other hand, stated that the average error between the numerical and experimental results of the deflection and strength values of PLA flexural samples produced by the FDM technique was below 10%. Accordingly, it is seen that the results of the FEA are in good agreement with the experimental results.…”

Section: Resultsmentioning

confidence: 99%

Effects of Post-UV-Curing on the Flexural and Absorptive Behaviour of FDM-3D-Printed Poly(lactic acid) Parts

Akderya¹

2023

Polymers

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In this study, the effects of the post-ultraviolet-curing process on the flexural, absorptive, and morphological properties of poly(lactic acid) specimens produced using a fused deposition modelling technique 3D printer were experimentally investigated. In this direction, 15, 30, 45, and 60 min post-UV-curing processes were applied to poly(lactic acid) three-point bending and absorption specimens produced at 190 and 200 °C. Three-point bending tests and morphological analyses were applied after the post-ultraviolet-curing process, and absorption tests were applied by immersing the post-ultraviolet-cured specimens in a distilled water bath for 1-, 3-day, and 1-, 2-, and 4-week exposure times. The changes in flexural strain properties for each experimental parameter were also simulated by the computer-aided finite element analysis and compared with the experimental results. It was observed that the post-ultraviolet-curing process increased the flexural strength of the poly(lactic acid) specimens produced at both 190 and 200 °C with the same increasing trend up to 30 min of exposure, and the most significant increase was determined in the specimens that were subjected to post-ultraviolet-curing for 30 min. Although the flexural strengths of the post-ultraviolet-cured specimens were higher than the non-cured specimens in all conditions, it was detected that they tended to decrease after 30 min.

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“…Using lightweight sandwich structures with proper core topology have many advantages such as high stiffness-to-weight ratio and high energy absorption capability [6]. Conventional methods used to manufacture the sandwich structures have many limitations for the structures with different geometries [7], while, the additive manufacturing (AM) is the state-of-the-art technology that changed the conventional approach to manufacturing systems [8]. 3D printing is an additive manufacturing technique widely used in the automotive and civil construction systems to obtain lightweight sandwich structures made with complex core shapes to achieve excellent multifunctional properties, such as flexural stiffness, and high energyabsorption capabilities [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the flexural properties of sandwich beams with auxetic core

Najafi

Ahmadi

Liaghat

2022

J Braz. Soc. Mech. Sci. Eng.

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Availing cellular structures as the core of sandwich beams is an innovative approach to improve the efficiency of them. Nonetheless, the flexural characteristics of sandwich beams is affiliated to the core topology. Accordingly, choosing an appropriate core can have a significant efficacy on the performance of sandwich beams. The purpose of the present study is to assess the influence of using auxetic cores in flexural properties of sandwich beams. Specifically, experimental and finite elements approaches were implemented to evaluate the flexural behavior, energy absorption and the stiffness of fully integrated 3D printed polymeric sandwich beams, made of 'square node anti-tetra chiral, arrowhead and re-entrant auxetic cores was investigated and compared with the conventional honeycomb core.Fabrication of specimens was performed using FDM 3D printing method and three point bending tests were conducted on the printed specimens. Results indicated that selection of proper core topology has remarkable effect on the flexural properties of sandwich beams, and using auxetic core is potentially an efficient method to enhance mechanical properties of sandwich beams duo to high load bearing capacity.

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The influence of stiffener geometry on flexural properties of 3D printed polylactic acid (PLA) beams

Cited by 23 publications

References 12 publications

Experimental analysis and optimization of mechanical properties of FDM-processed polylactic acid using Taguchi design of experiment

Experimental analysis and optimization of mechanical properties of FDM-processed polylactic acid using Taguchi design of experiment

Effects of Post-UV-Curing on the Flexural and Absorptive Behaviour of FDM-3D-Printed Poly(lactic acid) Parts

Investigation on the flexural properties of sandwich beams with auxetic core

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