Tangent Modulus (ls-dyna)
I want to obtain tangent modulus from the results of my uniaxial tensile test. I find the picture below on the internet. However, as you can see, there are infinite number of points where you can calculate the slope. To obtain the tangent modulus of my material, which point's slope is required?
In brief, how can I calculate the etan (tangent modulus) value from my diagram?