Evaluation of the Infill Design on the Tensile Response of 3D Printed Polylactic Acid Polymer

Autor:	Ahmed M. Sayed, Rizwan Ahmed Malik, Ibrahim M. Alarifi, Basheer A. Alshammari, Muneer Baig, Ramazan Asmatulu, Tarek M. A. A. EL-Bagory, Abdul Aabid, Tanner David Harpool
Rok vydání:	2021
Předmět:	Technology 0209 industrial biotechnology Toughness Materials science Modulus Fused filament fabrication finite element analysis 02 engineering and technology fused filament fabrication (FFF) Article 020901 industrial engineering & automation Brittleness Ultimate tensile strength Infill infill shapes General Materials Science Texture (crystalline) Composite material Tensile testing Microscopy QC120-168.85 QH201-278.5 3D printing construct stress Engineering (General). Civil engineering (General) 021001 nanoscience & nanotechnology TK1-9971 Descriptive and experimental mechanics Electrical engineering. Electronics. Nuclear engineering TA1-2040 0210 nano-technology strain diagrams
Zdroj:	Materials Volume 14 Issue 9 Materials, Vol 14, Iss 2195, p 2195 (2021)
ISSN:	1996-1944
DOI:	10.3390/ma14092195
Popis:	The current study explores the effects of geometrical shapes of the infills on the 3D printed polylactic acid (PLA) plastic on the tensile properties. For this purpose, by utilizing an accessible supply desktop printer, specimens of diamond, rectangular, and hexagonal infill patterns were produced using the fused filament fabrication (FFF) 3D printing technique. Additionally, solid samples were printed for comparison. The printed tensile test specimens were conducted at environmental temperature, Ta of 23 °C and crosshead speed, VC.H of 5 mm/min. Mainly, this study focuses on investigating the percentage infill with respect to the cross-sectional area of the investigated samples. The mechanical properties, i.e., modulus of toughness, ultimate tensile stress, yield stress, and percent elongation, were explored for each sample having a different geometrical infill design. The test outcomes for each pattern were systematically compared. To further validate the experimental results, a computer simulation using finite element analysis was also performed and contrasted with the experimental tensile tests. The experimental results mainly suggested a brittle behavior for solidly infilled specimen, while rectangular, diamond, and hexagonal infill patterns showed ductile-like behavior (fine size and texture of infills). This brittleness may be due to the relatively higher infill density results that led to the high bonding adhesion of the printed layers, and the size and thickness effects of the solid substrate. It made the solidly infilled specimen structure denser and brittle. Among all structures, hexagon geometrical infill showed relative improvement in the mechanical properties (highest ultimate tensile stress and modulus values 1759.4 MPa and 57.74 MPa, respectively) compared with other geometrical infills. Therefore, the geometrical infill effects play an important role in selecting the suitable mechanical property’s values in industrial applications.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ecb76c0a50c7d7199361b550297dcf6 https://doi.org/10.3390/ma14092195 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.