Accession Number : ADA130183

Title :   A Numerical Method in Solving a Coupled Thermoelasticity Equation and Some Results.

Descriptive Note : Final rept.,


Personal Author(s) : Li,Y Y ; Groneim,H ; Chen,Y ; Davis,J

PDF Url : ADA130183

Report Date : 10 Jun 1983

Pagination or Media Count : 30

Abstract : This report discusses a numerical method in solving a coupled dynamical thermoelasticity problem in a long hollow cylinder. The inner boundary conditions are the traction and the fluid temperature imposed on the inner surface of the cylinder, whereas the outer boundary is subjected to the ambient fluid temperature and is free of traction. This problem is solved by a finite element method in which the spatial and the time variables are discretized by several schemes. The study shows that the central explicit scheme for space discretization combined with a time marching scheme which incorporates moderate damping is suitable for this particular problem. Numerical results of the temperature and stress responses due to a modified step or single pulse are presented and discussed. One interesting observation is that, under high rate of stress loading, the coupling in the energy equation could generate temperature variations of significant magnitude. (Author)

Descriptors :   *Numerical methods and procedures, *Thermoelasticity, *Equations, *Problem solving, *Finite element analysis, *Gun barrels, Cylindrical bodies, Thermal stresses, Temperature, Fluids, Traction, Damping, Boundaries, Coupling(Interaction)

Subject Categories : Numerical Mathematics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE