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# Young modulus - Lab Report Example

Summary
According to the experiment findings the Young’s modulus for a copper wire was found out to be 183Gpa while that of wire thread was 5Gpa. Materials with strong bonds have a higher resistant to fracturing forces making them have high elastic modulus. …

## Extract of sampleYoung modulus

Download file to see previous pages... The paper tells that different materials have different mechanical properties that make them fit for various uses. Aluminum, Low Carbon Steel and High Carbon Steel have different strengths and they break at different loads. The Young’s Modulus (E) is a measure of stiffness of an elastic material defined as the ration of stress to the corresponding strain when a material is put under tension or compression. The most commonly used test specimens are cylindrical in shape. For this experiment, however, a wire was used as a specimen. When more loads are applied the specimen breaks at the centre. The data of load versus extension of the specimen is collected and used in calculation of stress and strain. The values are plotted on an X-Y graph and yield a typical graph. From the graph several material properties could be calculated and observe. The following experiment investigates the Young’s Modulus of a piece of wire subjected to tension. To get the Young’s Modulus, stress and strain of the wire must be calculated from the recorded results. The linear section of the graph is referred to as the yield strength where the material shows elastic behavior and it is used in the calculation of E. On the other hand, the other part of the graph is referred to as the non linear section. The yield point is the transition between the linear and the non-linear sections, and the magnitude of stress at this section is termed as the yield strength (σY). The slope of the linear section of the curve gives the material’s Young’s modulus, given in GPa. The formula for calculating young’s modulus is shown below. ...
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