異方性不物質中空円筒の動的熱応力

概要

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A numerical study is made of the transient, uncoupled dynamic thermal stresses in a hollow circular cylinder subjected to a sudden change in temperature on its internal boundary. The material of the structure is orthotropic with cylindrical anisotropy and, in addition, is continuously in-homogeneous with mechanical properties varying along the radius. The curvilinear characteristics in the space-time plane are transformed into straight lines of equal slope so that the numerical errors can be minimized. The problem is then solved using appropriate characteristic relations on boundaries while using more convenient explicit finite-difference approximations at all other points in the transformed space-time plane. The numerical results show clearly the propagation of discontinuities in stresses due to step heating on the internal boundary. The effects of the anisotropic non-homogeneous material properties on the dynamic stress distributions are discussed briefly.
1992-04-25