I conducted a tensile test on CR sheet. I got the load vs displacement data and converted into stress strain values in Excel. How to find the young's modules and poison ratio. somewhere I referred the equation of the tangent line on the stress strain plot is the young's modules. Does the equation of the tangent line as depicted in the attached pic is the young's modules. How to interpret the equation?
Thank You!
You should consider the tangent of the curve segment that is close to the 0 strain.
Slope 50 to 200 shows Modulus of Elasticity.
'Young's Modulus' or modulus of elasticity is a measurement of the rate of change of strain as a function of stress. It represents the slope of the straight-line portion of a stress-strain curve. With respect to tensile testing, it may be referred to as Tensile Modulus
You can find Young's modulus from linear region. In your case, you can find the slope(Young's modulus) from the marked region
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