HAKAN 206 Exp 1 - Our specimen broke in the safety length...

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MIDDLE EAST TECHNICAL UNIVERSITY DEPARTMENT OF METALLURGICAL&MATERIALS ENGINEERING METE 206 EXP1: TENSION TEST Asistant : Pelin Maradit Hakan Aktulga 1393875
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Objective: The aim of this experiment is to get the stress-strain diagram from tensile test, to determine the tensile properties and to get valuable information about the mechanical behavior and engineering performance of the material. Experimental: Instrument : ALSA universal test machine – 60 Ton Load Cell Power Supply Recorder Specimen: Specimen Type : TS 138 EN 10002 – 1 – Dog Bone Shape We use dogbone shape because we want the deformation, necking and fracture in a standarized area, and it is thinner in medium that results in deformation in medium. Procedure: We take specimen and record its dimensions – diameter, gage length, first length, safety length. Then we set up the tensile testing machine to deform and fracture the specimen and placed the specimen between the grips. Then we performed the test until fracture occurs. We observed fracture, max stress and strain.
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Unformatted text preview: Our specimen broke in the safety length line. Finally we record its final dimensions. Discussion: When a material is designed, its design parameters must be known. Mechanical properties are one of the most important properties for a material. Mechanical properties can de determined by using the tension test. We can obtain all the necessary values by drawing the stress-strain diagram like Young’s Modulus, yield point, yield stress, yield strain, elastic region, plastic region and these properties will guide us through the areas that we can use that material. In our experiment we had a tension test and drew a stress-strain diagram. However, we had some errors in our experiment. These errors may stem from the impurities, notches, cracks that the material has. In addition, there might be some human or mechanical mistakes. These errors result in the computations on the stress-strain diagram. References : Lab Manual...
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This note was uploaded on 12/27/2011 for the course MATH 265 taught by Professor Asas during the Spring '11 term at Middle East Technical University.

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HAKAN 206 Exp 1 - Our specimen broke in the safety length...

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