Tensile Testing (Determining Young's Modulus)

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Calculating Young's modulus from tensile testing may not be sensible if the material exhibits non-linear behavior or significant slipping during the test. The stress-strain curve must show a linear region to accurately determine Young's modulus, which is derived from the gradient of that linear section. If slipping occurs, it can lead to inaccuracies in the measurements, making the calculation unreliable. Therefore, proper conditions must be ensured during testing to obtain valid results. Accurate determination of Young's modulus is crucial for understanding material properties in engineering applications.
stpmmaths
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Question:
Why is it not sensible to calculate the Young's modulus of the material (steel) when the experiments was conducted?

But I thought it should be possible to calculate the Young's modulus after plotting the stress/strain curve. Young's modulus can be found by finding the gradient of the straight line on the curve. But what with the question? :confused:
 
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Is it related to the slipping which occurs during the test?
 

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