Buckling developed in 3D printed PLA cuboidal samples under compression: Analytical, numerical and experimental investigations

Torre, Roberto; Brischetto, Salvatore; Dipietro, Ivan Rocco

doi:10.1016/j.addma.2020.101790

Cited by 18 publications

(10 citation statements)

References 18 publications

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“…Furthermore, the lowest recorded value was 1951 MPa, whereas the highest was 2313 MPa. The influence of the height of the tested samples on the values of E c , indicated in [25], cannot be clearly confirmed on the basis of the collected data, as the heights of threaded rods made of PLA were significantly different in terms of the longest and shortest value (the rod's height was three times the height of the nut). The length of the measurement section, however, always equalled the height of the nut, and thus the differences in the lengths of the measurement sections themselves were smaller than between the lengths of entire rods.…”

Section: Results Of Static Testsmentioning

confidence: 90%

“…2529 MPa. Work described in [25] included the testing of rectangular samples with a base side length of 12.7 mm and heights between 20 mm and 65 mm, with the compression velocity of 1.3 mm/min. The researchers observed that the value of compression modulus E c increases proportionally to the length of the sample, with the exception of several local oscillations.…”

Section: Results Of Static Testsmentioning

confidence: 99%

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Compression Strength of PLA Bolts Produced via FDM

et al. 2022

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The aim of this research was to define the compression strength of polylactic acid bolts produced using the fused deposition modelling method. In accomplishing this, static and cyclic compression tests for different metric thread sizes were carried out in accordance with ISO 4014. Tests were conducted on M42, M48, M56, M60, and M64 threads, while samples with three different types of pitch—one nominal and two fine threads—were prepared for each diameter. Standard ISO 604 for defining the compression modulus Ec was implemented as the test basis. Accordingly, the mean compression modulus value Ec for all measurements was 917.79 ± 184.99 MPa. Cyclic compression tests were then carried out on samples with the M64 × 4 thread. Fifty thread loading cycles were carried out for each variant to obtained different strain amplitude values and strain frequencies. Our work indicated that the values of the storage modulus defined in cyclic tests E′ increased, while the values of the loss modulus E″ decreased when the value of the strain frequency increased. We found it not possible to determine the nature of the changes in the value of the storage modulus E′ in the function of the strain amplitude. We did, however, observe an increase in the value of the loss modulus E″, together with the increase in the tested range of the strain amplitude. The determined mechanical values can be therefore be used for designing threaded connections made of polylactic acid using the fused deposition modelling method.

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Section: Results Of Static Testsmentioning

confidence: 90%

Section: Results Of Static Testsmentioning

confidence: 99%

Compression Strength of PLA Bolts Produced via FDM

et al. 2022

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“…The mechanical properties of the material can be inferred from the slenderness ratio (SR), defined for a linear structure as the ratio between the overall length and the least radius of gyration of its cross‐section, as beyond a certain value of SR the element is prone to buckling and/or cracking. [ 20 ] In this case, the slenderness ratio of the window linings was 70. 3D printed models with similar SR have been reported to withstand critical loads up to 60 MPa.…”

Section: Resultsmentioning

confidence: 91%

Porous Platform Inks for Fast and High‐Resolution 3D Printing of Stationary Phases for Downstream Processing

Conti

Symington

Pullen

et al. 2023

Adv Materials Technologies

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Purifications of biologics can be improved using 3D printed stationary phases with perfectly ordered morphology. However, limited spatial resolution and lack of porous materials have hindered application of additive manufacturing in bioprocessing. To bridge this gap, digital light processing and polymerization‐induced phase separation are combined to fabricate platform materials with bed morphology at the micrometer scale, and porous network in the nanometer scale. Four different porous inks are developed, 3D printed, and characterized in terms of their rheological behaviour, polymerization kinetics, and printing resolution. Rapid 3D printing (down to 1 h) is achieved at scale (up to 100 mL column) of porous supports (50% porosity) at high resolution (up to 50 µm for linear features and 200 µm for complex geometries). 3D‐printed gyroids are chemically functionalized with various ion exchange ligands. These are successfully challenged for i) the separation of model proteins in dynamic conditions and ii) protein capture from a clarified cell harvest, demonstrating dynamic binding capacities between 5 and 16 mg mL−1 and up to 86% purity in a single run. This work introduces a rapid and facile approach to 3D printing porous inks to fabricate perfectly ordered stationary phases for downstream processing.

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“…The Crankshaft holder has been modified up to 3 times to ensure the strength of the structure. One of PLA's issues is a lower overall strength than the original models' components made by metal-based material [ 28 , 29 , 30 , 31 ], as shown in Figure 6 (ii.2). To solve the strength problem, it added specific thicknesses or features on parts that exhibit dynamic loads, such as the wall that prevents lateral movement of the crankshaft at the end of it and the holder itself ( Figure 6 (ii.3)).…”

Section: Resultsmentioning

confidence: 99%

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Model optimization and performance evaluation of hand cranked music box base structure manufactured via 3D printing

Alfarisi

Santos

Norcahyo

et al. 2021

Heliyon

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A sound produced from the music box could mesmerize music lovers. The complex mechanism that combined manual with semi-automatics movement creates the music box as a challenge for the manufacturer to innovate and optimize. This study focused on redesigning a hand-cranked music box's base structure using 3D printing and comparing the sound produced with the original model. It is shown that 3D printing can create a complex model with minimum material waste and good repeatability. After remodeling the music box's in a 3D CAD model, the prototype was built, and the tune played by each model was recorded and compared. The results showed that four improvements were made in the barrel mounting, crankshaft holder, crankshaft locker, and comb locker from the built four models. The sound analysis shows that the quality of sound can be improved by using the system's spacer. Furthermore, the finite element method and exact experiment results show that the loudest and best sound quality can be achieved using a 60° angle slope for the music box base structure.

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Buckling developed in 3D printed PLA cuboidal samples under compression: Analytical, numerical and experimental investigations

Cited by 18 publications

References 18 publications

Compression Strength of PLA Bolts Produced via FDM

Compression Strength of PLA Bolts Produced via FDM

Porous Platform Inks for Fast and High‐Resolution 3D Printing of Stationary Phases for Downstream Processing

Model optimization and performance evaluation of hand cranked music box base structure manufactured via 3D printing

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