Poisson's ratios influence on strength and stiffness of cylindrical bars

In case Multilayer cylindrical bars are subjected to tension or compression, due to Poisson effect, contact pressure between the layers occurs. As a result, a spatial stress state arises in the material. The analytical methodol ogy for accurate determination of stresses, assessing the influence of this effect is proposed. In case this phenome non is neglected, this often leads to stress, strength and stiffness methodological errors. The paper examines in detail how big they are and how these errors change in multilayer cylindrical bars. In addition to this, analytical equations to obtain the stress in multilayer bars are pre sented, at the same time evaluating the influence of Pois son effect. http://dx.doi.org/10.5755/j01.mech.17.2.327