Tensile test pieces

1910 ◽  
Keyword(s):  
Tensile Test ◽  
Test Pieces

Anisotropy Evaluation of Different Raster Directions, Spatial Orientations, and Fill Percentage of 3D Printed PETG Tensile Test Specimens

2019 ◽  
Vol 821 ◽  
pp. 167-173 ◽  
Author(s):  
Muammel M. Hanon ◽  
Róbert Marczis ◽  
László Zsidai
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Tensile Test ◽  
Fused Deposition Modelling ◽  
Elongation At Break ◽  
Know How ◽  
Fused Deposition ◽  
Test Pieces ◽  
3D Printed ◽  
Fill Percentage

In this paper, the mechanical properties of Polyethylene terephthalate-glycol (PETG) tensile test specimens have been investigated. The test pieces were prepared using fused deposition modelling (FDM) 3D printing technology. Three print settings were examined which are: raster direction angles, print orientations, and infill percentage and patterns in order to evaluate the anisotropy of objects when employing FDM print method. The variations in stress-strain curves, tensile strength values and elongation at break among the tested samples were studied and compared. Illustration for the broken specimens after the tensile test was accomplished to know how the test pieces printed with various parameters were fractured. A comparison with some previous results regarding the elongation at break has been carried out.

scholarly journals Influence of the 3D Printing Process Settings on Tensile Strength of PLA and HT-PLA

2020 ◽  
Vol 65 (1) ◽  
pp. 38-46
Author(s):  
Muammel M. Hanon ◽  
Róbert Marczis ◽  
László Zsidai
Keyword(s):  
Tensile Strength ◽  
3D Printing ◽  
Tensile Test ◽  
Fill Factor ◽  
Fused Deposition Modelling ◽  
Printing Technology ◽  
Elongation At Break ◽  
Fused Deposition ◽  
Test Pieces ◽  
Insight Into

Fused Deposition Modelling (FDM) is presently the most common utilized 3D printing technology. Since this printing technology makes the bodies anisotropic, therefore, investigate the process with different settings is worthwhile. Tensile test specimens of two plastics have been carried out to examine the mechanical properties. Polylactic acid (PLA) and High Temperature PLA (HT-PLA) are the used materials for this purpose. A total of seventy-two test pieces of the two used polymers were printed and evaluated. Three parameters were examined in twelve different settings when printing the tensile test specimens. The considered settings are; six raster directions, three build orientations and two filling factors. The differences in stress-strain curves, tensile strength values and elongation at break were compared among the tested samples. The broken specimens after the tensile test are illustrated, which gave insight into how the test pieces printed with different parameters were fractured. The optimum printing setting is represented at crossed 45/−45° raster direction, X orientation and 100 % fill factor, where the highest tensile strength of 59.7 MPa at HT-PLA and the largest elongation of about 3.5 % at PLA were measured.

Considerations on the Ultimate Tensile Strength of Butt Welds of the EN AW 5754 Aluminium Alloy, Made by Friction Stir Welding (FSW)

2020 ◽  
Vol 1157 ◽  
pp. 38-46
Author(s):  
Victor Verbiţchi ◽  
Radu Cojocaru ◽  
Lia Nicoleta Boțilă ◽  
Cristian Ciucă ◽  
Ion Aurel Perianu
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Ultimate Tensile Strength ◽  
Tensile Test ◽  
Aluminium Alloy ◽  
Hazardous Substances ◽  
Parent Metal ◽  
Friction Stir ◽  
Test Pieces ◽  
Fsw Parameters

Experiments have been performed for the butt welding of 160 mm x 90 mm x 2 mm sheets of EN AW 5754 aluminium alloy, where the friction stir welding (FSW) has been used.Referring to the parent metal, the chemical composition and the form of wrought products of the aluminium alloy EN AW 5754 is presented, according to the standard EN 573-1:2005, respectively EN 573-3:2013. The mechanical properties of EN AW-5754 (Al Mg3) sheets are presented, according to EN 485-2:2016. The experiments have been conducted on the own equipment for friction stir welding, type FSW-4kW-10kN, to execute 8 (eight) FSW test pieces, according to EN ISO 25239-4. A quenched FSW tool, own-made of C 45 grade steel, EN 10083, has been used. The parameters of the FSW tests are shown. As main parameters, the rotational speed of the FSW tool was in the range n = 800 – 1200 rev/min, respectively the travel speed was in the range v = 50 – 200 mm/min. The run of the joining experiments is described and the joining test pieces are presented in figures. The ultimate tensile strength of the parent metal (σmin,pm) is based on the specified minimum tensile strength of the ”O” condition of the parent material, respectively this value is also required for the weld, that is σmin,w = 190 MPa. The specimens T1.0, T1.1, T2.1, T2.2, T3.1, T3.2, T4.1, T4.2, T5.1, T5.2 și T6.1 are adequate and accepted by this tensile test. The specimens T1.2, T6.2, T7.1, T72. and T8.1 can be accepted, if higher properties are achieved with a full postweld treatment. Another possibility is a lower extent of the minimum tensile strength of the weld that shall be in accordance with another design specification, for example σmin,w = 145 MPa. By the correlation of the FSW parameters with the results of the tensile test, the ranges for the main parameters with adequate values of the ultimate tensile strength are established: n = 800 – 1000 rev/min and v = 50 – 100 mm/min. By the conclusions, the main aspects of the execution of the FSW test pieces, as well as the results of the tensile tests are selected. The involved industrial areas of the applications are: electro-technique, electronics, manufacturing, shipbuilding and automotive industries. The FSW process is ecological, because it neither uses, nor produces hazardous substances. The references consist of 12 titles.

scholarly journals Experiment on the Tensile Test Pieces

1941 ◽  
Vol 1941 (68) ◽  
pp. 43-78
Author(s):  
T. Koiwa ◽  
S. Terao
Keyword(s):  
Tensile Test ◽  
Test Pieces

Mechanism of Welding Test Pieces in Tensile Property Anomaly

2012 ◽  
Vol 472-475 ◽  
pp. 1147-1150
Author(s):  
Yu Chen ◽  
Xing Hua Chen ◽  
Shuang Wang
Keyword(s):  
Tensile Test ◽  
Heat Affected Zone ◽  
Aerospace Application ◽  
Cylinder Test ◽  
Test Pieces ◽  
Fracture Region ◽  
Weld Structure ◽  
Texture Structure ◽  
Initial Zone ◽  
Scanning Electron

Aiming at the mechanical property abnormality of a certain cylinder test piece for aerospace application, scanning electron microscope and metallographic microscope were used to observe and analyze the fracture and weld structure of test pieces under tensile test, and the reason of property abnormality was determined. On the fracture of welding test pieces under tensile test formed two evident characteristic zones, one of which was the initial zone looking like arc ribbons alternating with each other. More obvious texture structure formed in the welding heat affected zone, with the direction consistent with that of the fracture in the up arc zonal fracture region. The reason of the abnormality was that relatively significant texture structure formed in the welding heat affected zone, while its formation was related to the temperature field and stress during the process of welding.

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