An Experimental Investigation on the Effect of Test Speed on the Tensile Properties of the Petg Produced by Additive Manufacturing

Abstract

Additive manufacturing (AM) is a highly popular, versatile, and practical production technique due to its great ability of very fast prototyping. Compared to other traditional ways, the number of studies on AM techniques has increased in a noteworthy manner day by day on account of their promising potential for future works. In this paper, fused deposition modeling (FDM) technology was used to fabricate polyethylene terephthalate glycol (PETG) specimens and to analyze the effect of the test speed on their tensile properties. As for the printing parameters, solely layer thickness values (0.1 mm, 0.2 mm, and 0.4 mm) were altered while the other factors were kept constant. In order to ascertain the production effectiveness, hardness and surface roughness measurements were carried out. Uniaxial tensile tests were performed at three different test speeds: 5 mm/min, 25 mm/min, and 50 mm/min. Furthermore, after deformation inspections were conducted both in macro and micro scales to evaluate the failure better. From the damage analyses, it was seen that ductile dominant mixed type failure is valid for lower test speeds even though brittle dominant mixed type failure is detected for 50 mm/min test speed.

Effects of testing speed on the tensile and mode I fracture behavior of specimens printed through the Fused Deposition Modeling technique

“…The plastic materials’ mechanical properties have a strong relation with the testing speed. For this purpose, Ergene and Bolat 24 concluded that the lower testing speeds resulted in higher plastic behavior and in contrast, higher testing speed resulted in the brittle failure mechanism. It is worth noting that one of the important manufacturing parameters is the infill density and it was proved that the higher infill density resulted in higher impact properties.…”

The Impact Of Carbon Fiber on the surface properties of the 3D Printed PEGT Product

“…Figure (8) and (9) ShownThe PETG/Carbon samples had a hardness (Shore D) that was 2.16% lower than PETG's At produced FDM technology in the 3D printed where the average of hardness (Shore-D) equaled 73.74 D, 72.14D respectively at added 15% carbon fiber filler and Micro-hardness test was slightly increased of HV hardness of PETG/Carbon samples, where it equaled 10.4 HV but for PETG equaled 9.6 HV. These features were stated to improve the sliding properties of carbon fiber in PETG/Carbon samples, but at the buried structure of samples, the carbon fiber was made a stronger bond with a matrix of PETG polymers and good compatibility with it; suggested that an effective manufacturing technology to generate homogenized composite materials is a 3D printer and this can explicated by the number of stacked layers for PETG/Carbon[15],[14].…”