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7 June, 22:15

Compare the ten values of strain obtained while loading the beam to those obtained during unloading. Discuss why differences may have occurred. Are these differences acceptable?

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  1. 7 June, 22:28
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    The design of components for many engineering systems is based on the application of

    theoretical models. The accuracy of these models can be verified through testing. One way of

    validating a math model is to use a strain Gage measurement system to measure the strain at the

    surface of a structure. The sensor used to transfer a mechanical strain to a quantifiable output is

    the strain Gage. The strain Gage has a resistance which changes as a function of mechanical

    strain. Although the change in resistance can be quantified using an ohm meter, signal

    conditioning is used to convert the change in resistance to a voltage. The voltage may then be

    amplified, thus reducing quantization errors. The relationship between the input strain and the

    output voltage may be determined using the system sensitivity.
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