Calculates the distance between two curves according to: Jekel, C. F.,
Venter, G., Venter, M. P., Stander, N., & Haftka, R. T. (2018) “Similarity
measures for identifying material parameters from hysteresis loops using
inverse analysis”
Calculates the distance between two curves according to: A Andrade-Campos,
R De-Carvalho, and R A F Valente “Novel criteria for determination of material
model parameters”