Property-map of epoxy-treated and as-printed polymeric additively manufactured materials

Huynh, Nha Uyen; Smilo, Jordan; Blourchian, Aryan; Karapetian, Arbi V.; Youssef, George

doi:10.1016/j.ijmecsci.2020.105767

Cited by 15 publications

(4 citation statements)

References 36 publications

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“…A consequence of layering is the presence of pores and heterogeneities that cause anisotropic behaviour and preferential crack orientation 25 . The resistance of parts to mechanical damage is dependent on the orientation of the deposited layers 26 – 28 . Thus, the orientation of the parts on the 3D printer bed is an important consideration when manufacturing components 29 – 31 .…”

Section: Methodsmentioning

confidence: 99%

3D printed laboratory equipment to measure bulk materials in extreme conditions

Diviš

Hlosta

Žurovec

et al. 2022

Sci Rep

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Due to relatively new solutions in the field of 3D printing, there are few studies on the possibility of using printed elements in measuring devices. The aim of this study was to investigate the possibility of using instruments made by material extrusion 3D printing method for measurement of selected mechanical-physical properties of bulk materials. Study explores the feasibility of measuring bulk material mechanical-physical properties when there are obstacles for printing original or modified measuring instruments in common practice. To achieve the goals a series of experiments such as Schulze’s ring shear tests, Freeman’s FT4 shear tests, compressibility tests, and Flow Rate and Stability tests were performed with use of original aluminium or steel made instruments and 3D printed instruments from polylactic acid and acrylic styrene acrylonitrile materials, using lunar regolith simulants LHS-1 and LMS-1 produced by CLASS Exolith Lab as a sample material. The results obtained from tests with original and printed instruments were then compared. The compared values of tests showed applicability of the 3D printed measuring instruments in a 5% range of measurement deviation. The biggest advantages of the 3D printed measuring instruments were the lower weight, the ability to print on the spot, to replace a damaged part with a new 3D printed part on-demand if extremely fast results are needed or due to the logistical unavailability, customization of the standardized tests for better understanding the behaviour of the particulate materials, and cheaper manufacturing costs.

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Section: Methodsmentioning

confidence: 99%

3D printed laboratory equipment to measure bulk materials in extreme conditions

Diviš

Hlosta

Žurovec

et al. 2022

Sci Rep

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show abstract

“…The process–structure–properties interrelationships are at the nexus of the mechanics and materials science communities, where the mechanical properties depend on the processing parameters (Goh et al , 2019). In 3D printing using MEX, the building direction, raster orientation, infill patterns and layer height directly affect the mechanical behavior due to the mesostructure changes (Álvarez-Blanco et al , 2023; Huynh et al , 2020). For example, voids and air gaps resulting from the sequential deposition of molten filament imply a decrease in mechanical properties and process-induced anisotropy (Tronvoll et al , 2018; Hassanifard and Behdinan, 2023).…”

Section: Introductionmentioning

confidence: 99%

Multiscale characterization of additively manufactured PMMA: the influence of sterilization

Rufo-Martín,

Mantecón,

Youssef

et al. 2024

RPJ

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Purpose Polymethyl methacrylate (PMMA) is a remarkable biocompatible material for bone cement and regeneration. It is also considered 3D printable but requires in-depth process–structure–properties studies. This study aims to elucidate the mechanistic effects of processing parameters and sterilization on PMMA-based implants. Design/methodology/approach The approach comprised manufacturing samples with different raster angle orientations to capitalize on the influence of the filament alignment with the loading direction. One sample set was sterilized using an autoclave, while another was kept as a reference. The samples underwent a comprehensive characterization regimen of mechanical tension, compression and flexural testing. Thermal and microscale mechanical properties were also analyzed to explore the extent of the appreciated modifications as a function of processing conditions. Findings Thermal and microscale mechanical properties remained almost unaltered, whereas the mesoscale mechanical behavior varied from the as-printed to the after-autoclaving specimens. Although the mechanical behavior reported a pronounced dependence on the printing orientation, sterilization had minimal effects on the properties of 3D printed PMMA structures. Nonetheless, notable changes in appearance were attributed, and heat reversed as a response to thermally driven conformational rearrangements of the molecules. Originality/value This research further deepens the viability of 3D printed PMMA for biomedical applications, contributing to the overall comprehension of the polymer and the thermal processes associated with its implementation in biomedical applications, including personalized implants.

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“…[40,41] Lattice structures have been printed with a broad range of engineering materials using various additive manufacturing techniques, including fused filament fabrication, [42,43] material jetting, [40,44] vat photopolymerization, [22] and selective laser sintering. [45][46][47] These additively manufactured ordered lattice structures strategically (i.e., through intentional design and formal optimization) fill several gaps in property maps, [48][49][50] including stiffness, [51,52] strength, [53] specific energy absorption (SEA), [54] and toughness. [55] Furthermore, additive manufacturing technologies accelerated the development of discrete or continuous density and functionally graded materials, achieving architected metastructures with novel behaviors such as negative Poisson's ratio, [5,56] negative coefficient of thermal expansion, [57] or negative refractive index.…”

Section: Introductionmentioning

confidence: 99%

Structural Performance of Additively Manufactured Composite Lattice Structures: Strain Rate, Cell Geometry, and Weight Ratio Effects

Singh,

Ngo,

Huynh

et al. 2023

Adv Eng Mater

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The proliferation of ordered cellular structures in industrial and technological applications is justified by their superior mechanical performance, including tunable energy absorption strategies and potential multifunctionality. This research evaluates the mechanical response of composite lattice structures fabricated using vat photopolymerization additive manufacturing process and printable particulate composite materials. Several generations of modified printable resins are prepared by hybridizing flexible resin with varying glass microballoons reinforcement weight percentages. Multifaceted characterization regiments highlight the process–property–performance interrelationship by submitting printed composite structures to quasi‐static and impact‐loading scenarios combined with digital stills and high‐speed photography, respectively. Image analyses of optical and scanning electron micrographs quantify the dimensional accuracy of the composite lattice structures with cylindrical and hexagonal cellular geometries. The mechanical characterization uncovers the effect of cell geometry and reinforcement on the global structural behavior, eliciting differences in load‐bearing capacity, local strain developments, and structural densification. Exploratory digital image correlation supports the global structural deformations, revealing their relationship with the developed local strain state within the unit cells. The outcomes of this research elucidate the effect of strain rate, unit cell geometry, and reinforcing ratios on the structural performance of composite lattice structures at the macro‐ and microstructure levels.

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Property-map of epoxy-treated and as-printed polymeric additively manufactured materials

Cited by 15 publications

References 36 publications

3D printed laboratory equipment to measure bulk materials in extreme conditions

3D printed laboratory equipment to measure bulk materials in extreme conditions

Multiscale characterization of additively manufactured PMMA: the influence of sterilization

Structural Performance of Additively Manufactured Composite Lattice Structures: Strain Rate, Cell Geometry, and Weight Ratio Effects

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