How to calculate youngs modulus from the curve?

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Have any mathematical relation for all kind of materials?

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Murat Aydin

First, find the proportional limit on the curve. And then, select a point on the curve which is significantly below the proportional limit. From the origin to this point is your line reference line. And then, the slope of this line is your Young's modulus. The key point is the line should be straight to calculate the slope.

Engr. Tufail

Where is the curve? What is material type? What is load and strain rate?