Determination of Dynamic Tire Rubber Modulus in Different Deformation Modes

Abstract

Experimental determination of dynamic mo-mudulus of tire rubber in modes of periodic stretching, stretching-compression and compression was carried out. For periodic stretching on the UTS-5 test machine (Testsystems), samples were used in the form of blades 2 thick, 6,15 wide and 25 mm long at a test speed of 100 mm/min. Cylindrical specimens with a diameter of 17,5 mm and a height of 24,5 mm were used in periodic compression on the test machine UTS-5 and the company «Instron» Electropuls E1000. 6 and 12 mm thick samples made of rubber plates were used in the tensile and tensile-compression tests on the «Instron» machine In the Instron tensile, compression and tension-compression test, the frequency of strain variation varied from 1 to 10 Hz. It was obtained that the values of dynamic tensile moduli at a variable deformation of 20 % are lower than the values of static (equilibrium) tensile moduli at deformations of 10 and 30 %.