This paper presents the results of a study of
polyurethane rigid (PUR)
elastomers in terms of the constitutive law identification, and analyses the effect of
polyurethane elastomers' hardness on
fatigue properties. The research objects were PUR materials based on
4,4'-diphenylmethane diisocyanate (MDI) with the hardness of 80 ShA and 90 ShA, typically used in various industrial applications. Based on the performed experimental campaign under static and cyclic loading, the constitutive model proposed by Ogden is most appropriate. In addition, a hybrid numerical-experimental analysis (using FEM-
DIC) of diabolo specimens' behaviour is carried out in
fatigue tests. Based on the performed
fatigue test, it is worth noting that the energy approach describes the
fatigue process synonymously compared to the displacement or strain approach. Finally, simple
fatigue characteristics were analyzed and statistically validated for both PUR material configurations.