Ask a question from expert

Ask now

Tensile Test Assignment Sample

23 Pages2944 Words265 Views
   

Added on  2021-06-14

Tensile Test Assignment Sample

   Added on 2021-06-14

BookmarkShareRelated Documents
Tensile Testing LaboratoryAbstract Tensile tests are central for understanding properties of various materials, and how they will carry on under load. This lab tested six unique materials, including Annealed steel, Poly vinyl chloride (PVC), copper, polymethylmethacrylate (PMMA) and tempered steel. Every material were tested three times using a load frame. The information from each test was used to determineimportant material properties of extreme elasticity. This material property was utilized for contrasting the materials with each other, and to characterize the material as brittle or malleable. The result of the tensile tests demonstrated that the Annealed steel was the strongest material. It had the most ultimate tensile strength (520 MPa), followed by tempered steel which had 470 MPa, copper having 365 MPa, PMMA had 80 MPa, PVC had 60 MPa and finally plywood which had 50 MPa.ContentsAbstract.......................................................................................................................................................1
Tensile Test Assignment Sample_1
Introduction.................................................................................................................................................3Methodology...............................................................................................................................................4Procedure................................................................................................................................................4Results.....................................................................................................................................................6Data and calculation............................................................................................................................6Material Properties...................................................................................................................................18True Stress and True Strain....................................................................................................................18Discussion..................................................................................................................................................19Appendix A................................................................................................................................................20Appendix B................................................................................................................................................21Introduction Tensile testing is a standout amongst the most key tests for building, and gives valuable data about a material and its related properties. These properties can be utilized for plan and
Tensile Test Assignment Sample_2
examination of designing structures and for developing new materials that better suit a predefined use. The tensile testing laboratory was conducted using a load frame and the six distinct materials were tested, including Annealed steel, Poly vinyl chloride (PVC), copper, polymethylmethacrylate (PMMA) and tempered steel. The examples were rectangular in cross segment, with a decreased gage area. The reduce gage segment guaranteed that the most elevatedburdens happened inside the gage, and not close to the grasps of the heap outline, avoiding strainand crack of the example close or in the holds. The examples were at that point machined to the correct measurements required for the test, as indicated by ASTM gauges. Three examples of every material were tried in the load frame, and the information accumulated into an Excel spreadsheet. The information was utilized to compute tensile property of every material. The data was then plotted on engineering stress-strain curves to compare the samples. The reason for this investigation was to assemble data about every material so imperative mechanical properties could be resolved. This test likewise acclimated the understudies with the load frame that was utilized and the general strides to playing out a malleable test on a diminished gage area example.
Tensile Test Assignment Sample_3
MethodologyProcedure Every example was estimated with the calipers to decide the measurement of the cross segment. A gage length was resolved (50.00 mm) and scribed into the example with the goal that the separation between the two imprints could be estimated after the elastic test was finished. Normal lessened gage segment examples are appeared in Figure 1. The Lab see information procurement programming was begun, and the right material was picked. The heap cell was focused to guarantee that the product just estimated the malleable load connected to the example.The samples were stacked into the jaws of the Instron load frame with the goal that it was similarly divided between the two clasps. The hub and transverse extensometers were joined to the decreased gage area of the example, guaranteeing that the pivotal extensometer was set effectively while appending it to the gage and that the transverse extensometer was over the total measurement of the example. This precautionary measure brings about better information and forestalls harm to the extensometers. The Instron load frame, appeared in Figure 2 was preloaded utilizing the parchment wheel to guarantee that the sample was legitimately loaded on the frame, and that it wasn't slipping in the jaws. The load was discharged, and the extensometers were focused utilizing the Lab view programming. The test was begun, and the sample was loaded, bringing about a quantifiable strain. For the steel and copper tests, the crosshead was at first set to move upward at 1.25 mm/min, at that point at 15 mm/min at a predefined state past yielding. This expansion in the rate of strain accelerated the test, however may have likewise presented some blunder. The poly vinyl chloride (PVC) test began at 5 mm/min and was later accelerate to 30 mm/min. The PMMA tests were pulled at a steady rate of 10 mm/min. The information was accumulated utilizing the product, and stacked into a spreadsheet. At a set estimation of strain (past the yield strain), the product prevented utilizing information from the extensometers, and began gathering the strain data utilizing the situation of the moving crosshead. A notice message came up on the PC screen, educating the administrator to expel the extensometers to avert harm. The test proceeded until break, where the product ceased the moving crosshead, and completed the process of social affair information. The example was
Tensile Test Assignment Sample_4
expelled, and the crosshead was reset to the underlying position to begin another ductile test. Thetesting method was rehashed for whatever remains of the examples.figure 1: Reduced gage section specimen made from Annealed steel, ready for tensile testing.Figure 2 A typical Instron load frame used for tensiletesting.Results The data from the tensile tests was plotted onindependent diagrams as indicated by material. Eachgraph shows the engineering stress versus theengineering strain, as figured per Appendix A. table 1demonstrates the normal tests for the Annealed steeltests, and table 2 demonstrates the normal pliable trial ofthe copper tests. Table 3, table 4, table 5 and table 6 demonstrated the test consequences of the PVC, PMMA, tempered steel and plywood, separately.Data and calculation strain stressstrain * stress(stress-mean)square staim*square value03500-102.3710479.620
Tensile Test Assignment Sample_5
0.0253208-132.3717521.82438.04542250.0536018-92.378532.217426.6108450.05540022-52.372742.617150.84392950.0645027-2.375.61690.3370140.0754803627.63763.416957.25626750.07549036.7537.631416.017106.20126750.15005047.632268.617226.861690.12551063.7557.633321.217415.15211250.155207867.634573.817686.0725350.1755209167.634573.817800.41795750.252010467.634573.817914.763380.2550012547.632268.617567.1542250.35300105-152.3723216.628125.8159151.69764.512915.53256mean = 764.5/1.69 = 452.37standard deviation = sqroot(square*square value)/(N-1) = sqroot(12915.53256/1.69-1) = 136.81Table 1
Tensile Test Assignment Sample_6

End of preview

Want to access all the pages? Upload your documents or become a member.

Related Documents
Tensile Testing of Materials: Properties and Analysis
|16
|3103
|317

Tests on tensile strength PDF
|17
|2976
|188