Experimental study on the effects of a center hole for natural rubber bearings

摘要

We have estimated experimentally so as to examine into the influences of the center hole regarding the performance of natural rubber bearings. The rubber bearings were of three types, having differences regarding center holes (type A: no-hole,type B: hole filled up with rubber, type C: hole with a 5% rubber diameter).We were able to come up with a solution for the effects of the center hole for vertical and lateral stiffness within the limits of high vertical stress and high shear strain, but these effects were could hardly found with in ordinary vertical stress.