The effect of material density on load rate sensitivity in nonlinear viscoelastic material models (CROSBI ID 255022)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Kožar, Ivica ; Rukavina, Tea
engleski
The effect of material density on load rate sensitivity in nonlinear viscoelastic material models
This work presents the results of a numerical sensitivity analysis of material density on crack propagation in nonlinear viscoelastic softening material models. Two basic material models are analyzed: Maxwell and Kelvin material models, under the loading with changing rate (slow or fast impact loading). The material is discretized as a lattice model, and the analysis is performed on simple examples consisting of several lattice bars. The mathematical description is based on the theory of dynamical systems, i.e., it is a system of nonlinear differential equations for Kelvin, and a system of nonlinear differential-algebraic equations for Maxwell material model. Sensitivity of displacements on mass and load rate accompanies the analysis.
Nonlinear softening Maxwell material model ; Nonlinear softening Kelvin material model ; Load rate sensitivity ; Global parameter sensitivity
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Podaci o izdanju
89 (5)
2019.
873-883
objavljeno
0939-1533
1432-0681
10.1007/s00419-018-1448-9
Povezanost rada
Građevinarstvo, Temeljne tehničke znanosti