Computation and Comparison of Dynamic Viscosity based on Quasi-static and Dynamic FEM Analysis for AL7050-T7451

摘要

Coefficients of dynamic viscosity for AL7050-T7451 at room temperature is extracted by creep and stress relaxation simulations inAtnsys.An analogy has been established for both creep and stress relaxation,with simple Maxwell Model.The stress relaxation curve thus obtained is then used to generate the Prony series coefficients which are then used to run some dynamic analysis in Ansys to see the effect of loading at different frequencies on the value of rl (i.e dynamic viscosity).This will be verified with the simple analytical dynamic formulation based on the Maxwell Model.A good agreement has been found for both quasi-static and dynamic tests with Maxwell model.