After the simulation when I attempt to fit a curve between the dimensions and the stress, my machine learning alogrithm returns empty. Basically the algorithm could not find the relationship between the stress and the dimensions. I tried Linear, Polynomial, SVR, Neural networn and decision tress. All of them could not fit the data.
This is so strange because I find many scientifc researches and also commerical software that are doing this. Am I simplifying something or am I missing something? Any and all response are greatly appreciated!