Paper number 884
|ANALYTICAL AND COMPUTATIONAL SIMULATIONS OF EXPERIMENTAL DETERMINATIONS OF LINEAR VISCOELASTIC CONSTITUTIVE RELATIONS 1|
Cristina E. Beldica and Harry H. Hilton
Aeronautical and Astronautical Engineering Department, National Center for Supercomput-ing Applications, Center for Simulation of Advanced Rockets, University of Illinois at Urbana-Champaign, 104 South Wright Street, Urbana, IL 61801-2935 USA
|Summary||This paper addresses two important phenomena associated with interpretation of experimental viscoelastic material property data and of direct application to composites. The influences of distinct ramp loading functions and of the rise time to full load on experi-mental material characterizations are investigated analytically and through numerical simula-tions and their important contributions to accurate material characterization are evaluated. It is further demonstrated that the determination of relaxation and/or creep functions from the same experimental data in real time is a preferable protocol as it avoids additional unnecessary errors introduced through numerical transform inversions.
||Keywords|| constitutive viscoelastic relations, material property characterizations, relax-ation/ creep function interrelations, simulations of experiments, viscoelasticity.
Theme : Mechanical and Physical Properties ; Creep and Viscoelastic Behaviour
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