Effect of SiC/Al<sub>2</sub>O<sub>3</sub>particle size reinforcement in recycled LDPE matrix on mechanical properties of FDM feed stock filament

Bedi, Piyush; Singh, Rupinder; Ahuja, Inderpreet Singh

doi:10.1080/17452759.2018.1496605

Cited by 31 publications

(28 citation statements)

References 13 publications

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“…For instance, the flow rate of neat LDPE (at load 2000 g) is 3.29 cm 3 /10 min, when for composites that value decrease to 3.14 and 3.03 cm 3 /10 min, respectively for LDPE15 and LDPE30 (Table 4). Similar increases of MFI for LDPE were observed in the work of Bedi et al [18].…”

Section: Resultssupporting

confidence: 88%

“…As mentioned before, adding ceramic or metal powders to LDPE can improve its storage modulus [8], reduce shrinkage, and increase its mechanical properties [7]. Currently, LDPE composites with a mold flow index (MFI) of 10 g/10 min were successfully printed [18], so it is possible to manufacture an LDPE composite filament for FDM printing made from waste materials.…”

Section: Introductionmentioning

confidence: 99%

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Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

2019

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Low-density polyethylene (LDPE) composites reinforced with finely powdered waste glass were identified as a potential material for 3D printed structures for use in low-duty frictional applications. A recently published 3D printing model was used to calculate the limits in the filament feed rate and printing speed. Tribological tests (pin-on-disc method) of the printed composites were performed for different print-path directions. Differential scanning calorimetry (DSC) was performed on the samples and the composites showed a higher crystallinity compared with LDPE, which partially explains the higher elastic modulus of the composites determined during static tensile tests. Using a fine glass powder as reinforcement improved the wear resistance of LDPE by 50% due to the formation of a sliding film on the sample’s surface. An evident effect of friction direction vs. the printed path direction on wear was found; which was likely related to differences in the removal of friction products from the friction area for different print-path directions. The LDPE composites with fine waste glass particles are promising materials for low-duty frictional applications and should be the subject of further research.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

2019

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“…However, the components produced by material extrusion AM have anisotropic mechanical properties that are affected by the build orientation of the part [7] and the tool path calculated by the slicing software. The mechanical properties of the components can be improved by using a feedstock material reinforced with fibers and metallic/ceramics particles [8,9,10]. Another inherent feature of the layered-based manufacturing methods is that the finished parts have rough surfaces, which are more difficult to post-process in the case of thermoplastics than for metals [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of a numerical model for the strand shape in material extrusion additive manufacturing

Serdeczny

Comminal

Pedersen

et al. 2018

Additive Manufacturing

124

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We investigate experimentally and numerically the influence of the processing conditions on the cross-section of a strand printed by material extrusion additive manufacturing. The parts manufactured by this method generally suffer from a poor surface finish and a low dimensional accuracy, coming from the lack of control over the shape of the printed strands. Using optical microscopy, we have measured the cross-sections of the extruded strands, for different layer heights and printing speeds. Depending on the processing conditions, the cross-section of the strand can vary from being almost circular to an elongated rectangular shape with rounded edges. For the first time, we have compared the measurements of strands' cross-sections to the numerical results of a three-dimensional computational fluid dynamics model of the deposition flow. The proposed numerical model shows good agreement with the experimental results and is able to capture the changes of the strand morphology observed for the different processing conditions.

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“…In this study both WP and RT have been 3D printed with commercial open source fused deposition modelling (FDM). The WP material has been selected as primary recycled low-density polyethylene (LDPE) and high-density polyethylene (HDPE), whereas RT materials were secondary, reinforced LDPE with double [24]. Figure 1 shows the MFI tester used in the study [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Investigations for machinability of primary recycled thermoplastics with secondary recycled rapid tooling

2019

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This paper highlights the machinability of primary recycled thermoplastics as workpiece (WP) material with secondary recycled (reinforced) thermoplastic composites as rapid tooling (RT). Both WP and RT have been 3D printed on commercial fused deposition modelling. For investigating machinability of primary recycled thermoplastics, un-reinforced WP of low-density polyethylene (LDPE) and high-density polyethylene (HDPE) has been selected. The RT materials were secondary reinforced (recycled) LDPE with double particle size Al 2 O 3 particles and HDPE with triple particle size Al 2 O 3. The machinability has been calculated in terms of weight loss of WP, while machining on a vertical milling setup. This study also reports the surface hardness, porosity, surface roughness (Ra) and photomicrographic observations of WP and RT under controlled machining conditions. Further thermal analysis suggests that primary recycled thermoplastic can be successfully machined with secondary recycled RT, resulting in improved thermal stability and surface properties.

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Effect of SiC/Al₂O₃particle size reinforcement in recycled LDPE matrix on mechanical properties of FDM feed stock filament

Cited by 31 publications

References 13 publications

Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

Experimental validation of a numerical model for the strand shape in material extrusion additive manufacturing

Investigations for machinability of primary recycled thermoplastics with secondary recycled rapid tooling

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Effect of SiC/Al2O3particle size reinforcement in recycled LDPE matrix on mechanical properties of FDM feed stock filament

Cited by 31 publications

References 13 publications

Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

Preliminary Characterization of Novel LDPE-Based Wear-Resistant Composite Suitable for FDM 3D Printing

Experimental validation of a numerical model for the strand shape in material extrusion additive manufacturing

Investigations for machinability of primary recycled thermoplastics with secondary recycled rapid tooling

Contact Info

Product

Resources

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Effect of SiC/Al₂O₃particle size reinforcement in recycled LDPE matrix on mechanical properties of FDM feed stock filament