Influence of the spatial variation of Poisson's ratio upon the elastic field in nonhomogeneous axisymmetric bodies

摘要

The effect of a nonconstant Poisson's ratio upon the elastic field in functionally graded axisymmetric solids is analyzed. Both of the elastic coefficients, i.e. Young's modulus and Poisson's ratio, are permitted to vary in the radial direction. These elastic coefficients are considered to be functions of composition and are related on this basis. This allows a closed form solution for the stress function to be obtained. Two cases are discussed in this investigation: first, both Young's modulus and Poisson's ratio are allowed to vary across the radius and the effect of spatial variation of Poisson's ratio upon the maximum radial displacement is investigated; secondly, Young's modulus is taken as constant and the change in the maximum hoop stress resulting from a variable Poisson's ratio is calculated.