Stress–strain curve wikipedia. The stress strain diagram relates to the material model, which you can exercise on a simple block with three planes of symmetry and a displacement bc. you can make plots in ansys but if you generate tabular output, it is very easy to copy and paste into excel and if you know how to plot in excel, then you don't have to learn how to make a plot. Dr. dmitri kopeliovich stress-strain diagram expresses a relationship between a load applied to a material and the deformation of the material, caused by the load.. stress-strain diagram is determined by tensile test.. tensile tests are conducted in tensile test machines, providing controlled uniformly increasing tension how to make a stress strain diagram force, applied to the specimen. The stress-strain curve is approximated using the ramberg-osgood equation, which calculates the total strain (elastic and plastic) as a function of stress: where σ is the value of stress, e is the elastic modulus of the ma...