Finite element simulation of the thermoviscoplastic behaviour of bituminous concrete

Royis, P.; Seignol, Jean-François

doi:10.1002/(sici)1096-9853(199906)23:7<595::aid-nag985>3.3.co;2-m

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“…The material was considered as isotropic, and the linear viscoelastic behavior was implemented using complex modulus and complex Poisson ratio obtained from the 2S2P1D model (Equations and ) with the constants given in Table . FEM calculations are commonly applied to LVE materials and specially to solve inverse problems to determine the LVE properties . It should be noted though that the implementation of a continuous spectrum LVE model in a finite element model of AM is a new and recent approach.…”

Section: Linear Viscoelastic Behavior From Frequency Response Functionsmentioning

confidence: 99%

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Carret

Benedetto

Sauzéat

2020

Num Anal Meth Geomechanics

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Summary In the small strain domain, asphalt mixes (AM) have a linear viscoelastic (LVE) behavior that is strongly dependent on frequency and temperature. The maximum ratio of modulus values can be up to 1000, and traditional elastic analyses are not pertinent. The possibility to characterize AM from frequency response functions (FRFs) was studied. A new optimization process using the finite element method (FEM) has been developed to back‐calculate the LVE properties of AM from FRFs. The numerical optimization process was applied to a reference material with averaged LVE properties determined from tension‐compression tests performed on a wide variety of AM types. The LVE properties were modeled considering the 3‐Dim version of the model 2S2P1D (2 Springs, 2 Parabolic elements, and 1 Dashpot). Reference FRFs for the considered reference material were obtained from FEM simulations. Three different configurations that may be of interest for practical tests were studied at five different temperatures. The proposed numerical optimization method consists in performing separate optimizations at each temperature to obtain the LVE properties for the considered temperature. Then values obtained at each temperature are considered to optimize 2S2P1D and Williams Landel Ferry (WLF) Equation constants to simulate the global LVE behavior of the material. The accuracy of the process was assessed regarding both the calculated FRFs and the complex modulus evaluation. Results indicate that the proposed optimization process converges almost perfectly towards the reference FRFs. The simulated complex modulus values are also in very good agreement with the values of the reference material.

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Section: Linear Viscoelastic Behavior From Frequency Response Functionsmentioning

confidence: 99%

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Carret

Benedetto

Sauzéat

2020

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

Finite element simulation of the thermoviscoplastic behaviour of bituminous concrete

Cited by 1 publication

References 0 publications

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

Linear viscoelastic behavior of asphalt mixes from dynamic frequency response functions

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