Another calculation method for elastic modulus
When the numbers of elastic segment is small, and there's no other way to change or add it, we can use the curve method, namely check the deformation value of the curve inflection point.
For example:
Assume the deformation value of the inflection point of 4 mm, which take 50% of the deformation of another 2 mm.
Take the force value of the 2 deformation respectively, and caulculate the elastic modulus according to following formula:
