An effective engineering formula for torsion stiffness of rubber bush including amplitude dependence

摘要

Effective engineering formula for torsion stiffness of a long rubber bush in the frequency domain including amplitude dependence is presented. The classical theory of elasticity is the tool used to find this relation between torque and torsion angle in the frequency domain and by assuming an equivalent amplitude strain for the whole bushing. The complex value of the shear modulus to be inserted into the stiffness formula is calculated by applying a separable elastic, viscoelastic and friction rubber model to that equivalent strain.