Dynamic Modulus Testing of Rubber
Original Publication Date: 1985-Jan-01
Included in the Prior Art Database: 2005-Feb-18
The present method provides for testing the dynamic modulus and loss factor of rubber materials over a broad frequency range. The following equation has been found to govern the relation of measurable properties to dynamic modulus and loss factor and applies to the data obtained from both tensile testing and shear testing: (Image Omitted) where: a = acceleration of the free end of the sample F = force on the fixed end of the sample 1 = length of the tensile sample, or the thickness of the shear sample p = density of the rubber E = the tensile or shear modulus of the rubber m = mass of the rubber sample 1 = angular frequency of the vibration Tensile testing is used to obtain results in the 10 to 200 Hertz range, while shear testing is used to obtain results in the 200 to 3000 Hertz range.