Measuring Elastic Modulus of Materials in Tensile Testing

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helloy
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What could you do to obtain a more precise measure of the elastic modulus of a material in tensile testing?
 

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More precise than what?
 
than bending test :D
 
With what measurements and what instrumentation?
 
Using a more precise machine? A larger number of specimens? Different measuring apparatuses? Give us some sort of a lead here...
 

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