Mechanical Behaviour of 3D Printed PLA Hollow Spherical Parts Under Axial Compression

Hrițuc, Adelina; Mihalache, Andrei Marius; Mares, Marian; Coteaţă, Margareta; Dodun, Oana; Nagîţ, Gheorghe; Slatineanu, Laurentiu

doi:10.37358/mp.20.1.5307

Cited by 6 publications

(5 citation statements)

References 5 publications

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“…All elements in the matrix are functions of these constants. The elements of the matrix   Q are functions of the four independent elements [16][17][18][19]. Considering a thermo-mechanical stress, in the numerical modeling of the polymer sintering processes, heat transfer relations were used [20].…”

Section: Fiber Bond Lengths B L Densitymentioning

confidence: 99%

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Using PET-G to Design an Underwater Rover Through 3D PrintingTtechnology

Grigore¹,

Stefan²,

Orban³

2020

Mater. Plast.

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The development of 3D printing technologies has gained considerable momentum. Almost every technical-scientific field uses this technology. The technology of 3D printing thermoplastic materials (or fusible filaments - FFF), is based on the realization of the parts by depositing successive layers of extruded filament at temperatures corresponding to the viscous aggregation state. One of the research activities of the CERAS research center is the realization of collaborative drone systems, drones capable of moving in each of the three unstructured environments: aerial, terrestrial aquatic / underwater. This paper presents a study on the choice of the type of thermoplastic material, for making the structural elements (chassis) of an underwater Rover. The need for this study arose from the fact that the design and construction of underwater vehicles is generally demanding. The materials must be characterized by resistance to compression / stretching / shearing, as in underwater environments the existence of currents, pressures (with increasing depth of immersion). Also, the materials must be chemically neutral, because in aquatic environments we can find various chemicals spilled in water (intentional or not) and finally salinity.

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Section: Fiber Bond Lengths B L Densitymentioning

confidence: 99%

“…The PLA characteristics according to [19], (Table 1), present values for the maximum load related to the elasticity area, taking into account the variation: wall thickness, printing speed, extruder cooling conditions and printing bed temperature.…”

Section: Considerations For Tensile Testing In Order To Choose the Mamentioning

confidence: 99%

Using PET-G to Design an Underwater Rover Through 3D PrintingTtechnology

Grigore¹,

Stefan²,

Orban³

2020

Mater. Plast.

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“…Different monomer mixtures were used to identify variants that could avoid crack propagation during subsequent sintering. Research results on the compression behavior of hollow spherical bodies from polylactic acid were presented in the work [ 16 ]. The compression of spheres from different wood categories manufactured using a tubular tool was addressed in the work [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Some Balls Manufactured by 3D Printing from Ceramic–Polymer Composite Materials

Hrițuc,

Ermolai,

Mihalache

et al. 2024

Micromachines

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It is known that ceramic–polymer composite materials can be used to manufacture spherical bodies in the category of balls. Since balls are frequently subjected to compression loads, the paper presents some research results on the compression behavior of balls made of ceramic composite materials with a polymer matrix. The mathematical model of the pressure variation inside the balls highlights the existence of maximum values in the areas of contact with other parts. Experimental research was carried out on balls with a diameter of 20 mm, manufactured by 3D printing from four ceramic–polymer composite materials with a polymer matrix: pottery clay, terracotta, concrete, and granite. The same ceramic–polymer composite material was used, but different dyes were added to it. A gravimetric analysis revealed similar behavior of the four materials upon controlled heating. Through the mathematical processing of the experimental results obtained by compression tests, empirical mathematical models of the power-type function type were determined. These models highlight the influence exerted by different factors on the force at which the initiation of cracks in the ball materials occurs. The decisive influence of the infill factor on the size of the force at which the cracking of the balls begins was found.

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“…Design of Experiments (DOE) is a statistical approach to achieve desired results with lesser experiments to attain similar outcomes. [20][21][22] Several studies report using DOE as a reliable technique to produce valuable data from a limited number of experiments. 23,24 For instance, Dev and Srivastava 25 studied the effect of layer height, printing orientation, and infill density on ABS 3D printed components' mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Microscopic analysis on dimensional capability of fused filament fabrication three-dimensional printing process

Rashid

Qadir

Koç

2021

Journal of Elastomers & Plastics

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Fused Filament Fabrication (FFF) has been the most widely used three-dimensional printing (3DP) technology due to its cost-effectiveness, easy application, and material readiness. FFF, to date, has been used to fabricate polymer components for rapid prototyping and increasingly for some end-user applications. Thus, there is a pressing need to optimize 3DP process parameters for FFF materials to achieve higher dimensional accuracy, especially in functional components for final use applications. Therefore, to ensure desired geometries with reasonable accuracy, precise measurements are required to validate the FFF process’s dimensional capability under different process conditions. This study presents the dimensional measurement and statistical analysis to evaluate the effect of printing materials, speed, and layer heights on dimensional accuracy and repeatability of the commercial FFF process. A benchmark part model was designed with different external and internal features commonly used in manufacturing processes. Taguchi’s design of experiments (DOE) was employed to obtain the experiments scheme, followed by the 3DP, dimensional measurement, and analysis of 3DP samples. Results revealed polylactic acid (PLA) material provided better dimensional control in most of the features. Higher printing speeds and layer heights were found optimum for external features/protrusions, whereas lower-to-medium speeds and layer heights were more appropriate for the fabrication of internal features.

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Mechanical Behaviour of 3D Printed PLA Hollow Spherical Parts Under Axial Compression

Cited by 6 publications

References 5 publications

Using PET-G to Design an Underwater Rover Through 3D PrintingTtechnology

Using PET-G to Design an Underwater Rover Through 3D PrintingTtechnology

Compressive Behavior of Some Balls Manufactured by 3D Printing from Ceramic–Polymer Composite Materials

Microscopic analysis on dimensional capability of fused filament fabrication three-dimensional printing process

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