The generalized Kelvin chain-based model for an orthotropic viscoelastic material

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F24%3APU152302" target="_blank" >RIV/00216305:26110/24:PU152302 - isvavai.cz</a>

Alternative codes found

RIV/62156489:43410/24:43924875

Result on the web

<a href="https://link.springer.com/article/10.1007/s11043-024-09678-4" target="_blank" >https://link.springer.com/article/10.1007/s11043-024-09678-4</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11043-024-09678-4" target="_blank" >10.1007/s11043-024-09678-4</a>

Result language

angličtina

Original language name

The generalized Kelvin chain-based model for an orthotropic viscoelastic material

Original language description

We propose a constitutive material model to describe the rheological (viscoelastic) mechanical response of timber. The viscoelastic model is based on the generalized Kelvin chain applied to the orthotropic material and is compared to the simple approach given by standards. The contribution of this study consists of the algorithmization of the viscoelastic material model of the material applied to the orthotropic constitutive law and implementation into the FEM solver. In the next step, the fitting of the input parameters of the Kelvin chain is described, and at least a material model benchmark and comparison to the approach given by standards were done. The standardized approach is based on the reduction of the material rigidity at the end of the loading period using a creep coefficient, whereas the loading history state variables are not considered when establishing the result for a specific time step. The paper presents the benefits of the rheological model. It also demonstrates the fitting algorithm based on particle swarm optimization and the least squares method, which are essential for the use of the generalized Kelvin chain model. The material model based on the orthotropic generalized Kelvin chain was implemented into the FEM solver for the shell elements. This material model was validated on the presented benchmark tasks, and the influence of the time step size on the accuracy of model results was analyzed.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20302 - Applied mechanics

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

MECHANICS OF TIME-DEPENDENT MATERIALS

ISSN

1385-2000

e-ISSN

1573-2738

Volume of the periodical

28

Issue of the periodical within the volume

3

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

21

Pages from-to

1639-1659

UT code for WoS article

001173370800001

EID of the result in the Scopus database

2-s2.0-85186539675