Statics - Tensile Test
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Statics - Tensile Test Aim & Objectives The aim and objective of this test is to observe and investigate the way in which materials respond to stress. In the practical lesson we will be using three types of metal (Sample A; B; C) All three will be tested on their strength of tension and using the data that we recover we will be able to judge the name of the metal. The metal that breaks first will have a lower breaking point making it a brittle metal; however, the more withstanding metal will be more ductile. Introduction The Tensile test involves stretching a material to a point where it fails, or breaks. This method of testing is essential to many engineering applications because it judges the ability of the metal to perform in various situations like buildings, ships or engines. Testing the tensile strength of a material involves placing it into a tensile machine that has special jaws that clamp the metal.
After measuring the inner length, we find the outer length. These measurements will come in handy because the computer will automatically calculate them into cross-sectional area, which is needed for some formulae. When all the important measurements have been carried out the test piece must be clamped into the tensile testing machine. The testing machine is a high... Once everything is in place, a small load is pressed against the specimen to keep it tightly in place. Whilst the material is tightly clamped, we fit in the extensometer. The extensometer is a mechanical device that is fitted onto the metal, parallel to its total length. Whilst a tensile stress testing is taking place the distance increase between the points that you clamped the meter, the increase is very accurate and gets stored on the computer, the machine does the same job as the extensometer however, it is less accurate.
to finally achieve a set of results. Therefore I can confirm that Sample A is the most effective metal to use in real-world applications that require a lot of resistance towards stress. This can include agile structures, planes, ships. Sample B is ideal for typical structures such as multi-storey buildings. Lastly, Sample C is rarely used for high resistance demanding structures because iron is used to make steel, therefore it can be used for minor jobs. Additional notes Fig 1.1 Shows the diagram of the specimen and indicates the positions at which you must measure Fig 1.2 Is a photograph of the two tools that we used to collect the raw data Fig 1.3 Shows the tensile stress testing machine Bibligraphy http://en.wikipedia.org/wiki/Tensile_strength http://campusmoodle.rgu.ac.uk/mod/resource/view.php?id=1393013 (Group B Thursday 22 Oct 3.00 Sample A - C) http://outreach.materials.ox.ac.uk/LearningResources/downloads/Tensile%20Test%20Worksheet.doc http://books.google.co.uk/books?id=TO9dSoi0P6gC&pg=PA458&lpg=PA458&dq=metal+with+young#v=onepage&q=&f=false (Tensile Testing) Appendices Tensile Test Lab Results Tensile Test - Lab Report (Handout used as a guide for our coursework, small format diagrams listed below) ?? ?? ?? ??
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