Evaluation of the Young's Modulus of Rubber-Like Materials Bonded to Rigid Surfaces with Respect to Poisson's Ratio

摘要

Axially loaded rubber blocks with a circular cross-section, whose ends are bonded to rigid plates, were studied. The frequency-response functions were obtained with a finite-element model on rubber specimens with respect to Poisson's ratio and the shape factor. Then the apparent Young's modulus was estimated and various equations that describe the relationship between the apparent Young's modulus and the actual Young's modulus of the rubber material were used to estimate the Young's modulus of the rubber material. The subsequently estimated Young's modulus of the rubber material was compared to the one defined in the finite-element model. It is shown that there is a significant difference in the estimated Young's modulus when different equations were used, especially when the Poisson's ratio of the rubber material is smaller than the theoretical value of 0.5.