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Keywords:
Strain and stress distributions in superalloys; high-temperature creep; viscoelasticity; interface diffusion; PDE’s of evolution; method of discretization in time; Rothe sequences
Strain and stress distributions in superalloys; high-temperature creep; viscoelasticity; interface diffusion; PDE’s of evolution; method of discretization in time; Rothe sequences
Summary:
In a new micromechanical approach to the prediction of creep flow in composites with perfect matrix/particle interfaces, based on the nonlinear Maxwell viscoelastic model, taking into account a finite number of discrete slip systems in the matrix, has been suggested; high-temperature creep in such composites is conditioned by the dynamic recovery of the dislocation structure due to slip/climb motion of dislocations along the matrix/particle interfaces. In this article the proper formulation of the system of PDE’s generated by this model is presented, some existence results are obtained and the convergence of Rothe sequences, applied in the specialized software CDS, is studied.
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