Impact of hardness on the fracture and tear characterization of rigid pur materials used in suspension systems of vehicles

Constitutive Law Identification and Fatigue Characterization of Rigid PUR Elastomers 80 ShA and 90 ShA

“…Structural components made of elastomers such as polyurethane or rubber (mainly) work excellently in compression and shear stress states, because they can be easily damaged during tensile stress [ 1 ]. One of the excellent examples of structural components used in suspension systems is metal–elastomer (such as the considered PUR material) bushings, which are indirectly related to the research topic undertaken in recent papers [ 2 , 3 , 4 ]. As already mentioned, they are used to connect individual elements of the suspension system.…”

“…It allows for properly designing the control arms and links, and the seating of all components in the vehicle’s structure. In comparison with rubber, PUR, with its properties, seems to be ideal for use in suspension systems [ 2 ]. It retains its elastic properties at temperatures as low as −40 °C.…”

“…The structure of this polymer resembles a tangled line, which becomes intertwined when stretched, making it very difficult to break. It should be noted that common polyurethane configurations found in the marketplace come in two grades [ 2 , 3 , 4 , 11 ]: soft rubber replacement (70–80 ShA) and hard rubber replacement (90–95 ShA).…”