I have a force vs displacement graph of an I-beam that is supported by 2 pin joints, and 2 equal forces on top causing it to bend. I am required to find the Elastic modulus of the beam. How do I do this? Am I using the equation: E/R = σ/y = M/I, or turning the displacement into strain? I also have no idea how to do this. Do I find the neutral axis and radius of curvature? Can someone please help me?! Thank you.