| Abstract [eng] |
The stress state of two-layer hollow bars in which they are exposed to axial load is analyzed. The layers are made of isotropic, homogeneous, linearly elastic material, and the layers are as concentric cylinders. A mathematical model for two-layer tension- compression cylindrical bar axial, radial and ring stress and to set the limit values in the layers is presented. To asses the stress condition in the layers the expression of reletive stresses in the contact zone is obtained. It enables to determine how much for the construction under discussion, the stress state is threedimensional, two-dimensional or axial. For the relative stress determination a limit curve and its equation are proposed. It has been determined that the relative stresses depend on the values of Poisson's ratio, modulus of elasticity, the radial dimensions and cross-sectional layer areas ratios, also the layout and construction materials. The analysis of the derived equations demonstrated that in certain cases, radial and circular stresses may form a significant part of axial stress value. The maximum relative stress-establish the proposed limit curves equation. |
