Rotating Bending Fatigue Analysis of Printed Specimens from Assorted Polymer Materials

Brčić, Marino; Kršćanski, Sanjin; Brnić, Josip

doi:10.3390/polym13071020

Cited by 16 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The focus of his work is to analyse the influence of material extrusion rates and line widths on GPLA to provide an in-depth understanding of the trade-offs that can be made while manufacturing parts using the FFF process specifically in terms of dimensional accuracy, surface texture, hardness, and flexural strength. These are common issues associated with FFF-printed parts [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]32,34,[46][47][48][49][50][51]. It has been established through the results in this work that small line widths provide more accuracy with longer print times whereas large line widths offer more stability with shorter printing times.…”

Section: Materials Quality Characterizationmentioning

confidence: 96%

“…The FFF process has several notable advantages such as ease of operation, wide variety of materials, and cost-effectiveness [9][10][11][12]. PLA, ABS, and ASA are examples of commonly used thermoplastics for FFF and they have been widely researched over the years [13][14][15][16][17][18] for the optimization of their processing parameters to achieve properties. For example, Aslani et al [19] investigated the effects of extraction temperature and wall thickness on the dimensional accuracy and surface roughness of FFF-printed PLA parts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the Influence of Material Extrusion Rates and Line Widths on FFF-Printed Graphene-Enhanced PLA

Butt

Bhaskar

Mohaghegh

2022

JMMP

View full text Add to dashboard Cite

Fused filament fabrication (FFF) is a widely used additive manufacturing process that can produce parts from thermoplastics. Its ease of operation and wide variety of materials make it a popular choice for manufacturing. To leverage such benefits, the commonly used thermoplastics (e.g., PLA and ABS) are impregnated with nanoparticles, short or continuous fibers, and other additives. The addition of graphene nanoplatelets to PLA makes for a high-quality filament possessing enhanced mechanical, electrical, and thermal properties. Even with the advancement in materials, the optimisation of the process parameter remains the most complex aspect for FFF. Therefore, this study investigates the influence of two under-researched and overlooked processing parameters (material extrusion rates and line widths) on commercially available graphene-enhanced PLA (GPLA). Nine different material extrusion rates (70% to 150%) and five different line widths (0.2 mm to 1 mm) were used to manufacture GPLA specimens using a low-cost, desktop-based 3D printer, as per British and international standards. The study analyses the influence of these two processing parameters on mass, dimensional accuracy, surface texture, and mechanical properties of GPLA specimens. A non-destructive test has also been conducted and correlated with three-point flexural test to establish its applicability in evaluating flexural properties of GPLA. The results how that small line widths provide more accuracy with longer print times whereas large line widths offer more strength with shorter printing times. Increase in material extrusion rates adversely affect the surface finish and hardness but positively influence the flexural strength of GPLA specimens. The study shows that the manipulation of material extrusion rates and line widths can help designers in understanding the limitations of the default printing settings (100% material extrusion rate and 0.4 mm line width) on most desktop 3D printers and identifying the optimal combination to achieve desired properties using the FFF process.

show abstract

Section: Materials Quality Characterizationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Investigating the Influence of Material Extrusion Rates and Line Widths on FFF-Printed Graphene-Enhanced PLA

Butt

Bhaskar

Mohaghegh

2022

JMMP

View full text Add to dashboard Cite

show abstract

“…Numerous methods have been used so far to test the mechanical properties of printed materials, such as the Charpy test [ 43 ] or rotating bending fatigue analysis [ 44 ]; in this work, uniaxial tensile testing is utilized. Test specimens according to the ISO 527-2 standard ( Figure 5 ), with a square cross-section, were modeled in the SOLIDWORKS software package, then exported in .stl format suitable for 3D printing.…”

Section: Additive Manufacturing Considerations and Experimental Testingmentioning

confidence: 99%

Experimental Characterization of Composite-Printed Materials for the Production of Multirotor UAV Airframe Parts

et al. 2023

Self Cite

View full text Add to dashboard Cite

In this paper, the characterization of 3D-printed materials that are considered in the design of multirotor unmanned aerial vehicles (UAVs) for specialized purposes was carried out. The multirotor UAV system is briefly described, primarily from the aspect of system dynamics, considering that the airframe parts connect the UAV components, including the propulsion configuration, into a functional assembly. Three additive manufacturing (AM) technologies were discussed, and a brief overview was provided of selective laser sintering (SLS), fused deposition modeling (FDM), and continuous fiber fabrication (CFF). Using hardware and related software, 12 series of specimens were produced, which were experimentally tested utilizing a quasi-static uniaxial tensile test. The results of the experimental tests are provided graphically with stress–strain diagrams. In this work, the focus is on CFF technology and the testing of materials that will be used in the production of mechanically loaded airframe parts of multirotor UAVs. The experimentally obtained values of the maximum stresses were compared for different technologies. For the considered specimens manufactured using FDM and SLS technology, the values are up to 40 MPa, while for the considered CFF materials and range of investigated specimens, it is shown that it can be at least four times higher. By increasing the proportion of fibers, these differences increase. To be able to provide a wider comparison of CFF technology and investigated materials with aluminum alloys, the following three-point flexural and Charpy impact tests were selected that fit within this framework for experimental characterization.

show abstract

“…PCL, which is the same as PLA metabolites, is also favored due to its excellent biocompatibility and biodegradability. It has good flexibility and processability, and is easy to form film, although its mechanical strength is slightly insufficient ( Zhai et al, 2017 ; Brčić et al, 2021 ). PLGA is formed by the polymerization of two kinds of monomers including PLA.…”

Section: Current Situation and Future Prospects Of Ua Nanoformulationsmentioning

confidence: 99%

Nanoformulations of Ursolic Acid: A Modern Natural Anticancer Molecule

et al. 2021

View full text Add to dashboard Cite

Background: Ursolic acid (UA) is a natural pentacyclic triterpene derived from fruit, herb, and other plants. UA can act on molecular targets of various signaling pathways, inhibit the growth of cancer cells, promote cycle stagnation, and induce apoptosis, thereby exerting anticancer activity. However, its poor water-solubility, low intestinal mucosal absorption, and low bioavailability restrict its clinical application. In order to overcome these deficiencies, nanotechnology, has been applied to the pharmacological study of UA.Objective: In this review, we focused on the absorption, distribution, and elimination pharmacokinetics of UA in vivo, as well as on the research progress in various UA nanoformulations, in the hope of providing reference information for the research on the anticancer activity of UA.Methods: Relevant research articles on Pubmed and Web of Science in recent years were searched selectively by using the keywords and subheadings, and were summarized systematically.Key finding: The improvement of the antitumor ability of the UA nanoformulations is mainly due to the improvement of the bioavailability and the enhancement of the targeting ability of the UA molecules. UA nanoformulations can even be combined with computational imaging technology for monitoring or diagnosis.Conclusion: Currently, a variety of UA nanoformulations, such as micelles, liposomes, and nanoparticles, which can increase the solubility and bioactivity of UA, while promoting the accumulation of UA in tumor tissues, have been prepared. Although the research of UA in the nanofield has made great progress, there is still a long way to go before the clinical application of UA nanoformulations.

show abstract

Rotating Bending Fatigue Analysis of Printed Specimens from Assorted Polymer Materials

Cited by 16 publications

References 33 publications

Investigating the Influence of Material Extrusion Rates and Line Widths on FFF-Printed Graphene-Enhanced PLA

Investigating the Influence of Material Extrusion Rates and Line Widths on FFF-Printed Graphene-Enhanced PLA

Experimental Characterization of Composite-Printed Materials for the Production of Multirotor UAV Airframe Parts

Nanoformulations of Ursolic Acid: A Modern Natural Anticancer Molecule

Contact Info

Product

Resources

About