Model-based determination of nonlinear material parameters of metals with low melting points

2014 ◽  
Author(s):  
Frantisek Mach ◽  
Jana Kuthanova ◽  
Katerina Mizerova ◽  
Pavel Karban ◽  
Pavel Kus ◽  
...  
Keyword(s):  
Nonlinear Material ◽  
Melting Points ◽  
Material Parameters ◽  
Model Based

scholarly journals Inverse Analysis of Cellulose by Using the Energy-Based Method and a Rotational Rheometer

2018 ◽  
Vol 8 (8) ◽  
pp. 1354 ◽  
Author(s):  
Bilen Abali
Keyword(s):  
Nonlinear Response ◽  
Material Model ◽  
Nonlinear Material ◽  
Strain Response ◽  
Representation Theorems ◽  
Material Parameters ◽  
Highly Nonlinear ◽  
Material Equation ◽  
Material Equations

Biological and polymer-type materials usually show a complicated deformation behavior. This behavior can be modeled by using a nonlinear material equation; however, the determination of coefficients in such a material equation is challenging. We exploit representation theorems in continuum mechanics and construct nonlinear material equations for cellulose in an oscillatory rheometer experiment. The material parameters are obtained by using the energy-based method that generates a linear regression fit even in the case of a highly nonlinear material equation. This method allows us to test different nonlinear material equations and choose the simplest material model capable of representing the nonlinear response over a broad range of frequencies and amplitudes. We present the strategy, determine the parameters for cellulose, discuss the complicated stress-strain response and make the algorithm publicly available to encourage its further use.

Direct determination of the concentration dependence of diffusivities using combined model-based Raman and NMR experiments

2009 ◽  
Vol 277 (2) ◽  
pp. 96-106 ◽  
Author(s):  
E. Kriesten ◽  
M.A. Voda ◽  
A. Bardow ◽  
V. Göke ◽  
F. Casanova ◽  
...  
Keyword(s):  
Concentration Dependence ◽  
Direct Determination ◽  
Combined Model ◽  
Model Based
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