Finite element modeling of transient hydrogen trapping in a network of randomly sized voids
Abstract
An adaptation of the hydrogen transport model is proposed to model the transient trapping of hydrogen in a network of randomly sized voids at pressures beyond the validity of perfect gas. To achieve this, the randomly sized voids are replaced by constant size voids, the radius of which being defined by the statistical properties of the size distribution, and with the same trapping kinetics. It is especially shown that this equivalent radius is not equal to a simple volumetric average of the void radius. This homogenization approach allows to determine the spatiotemporal evolution of the amount of hydrogen trapped in all the voids as a function of diffusive hydrogen conditions. This model is implemented in Abaqus using a user subroutine. It is validated on a configuration of the literature, in which the voids are explicitly modeled in finite elements, and a parametric study on the model parameters is conducted.
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BibTeX
@article{chroeun2026finite,
title = {{Finite element modeling of transient hydrogen trapping in a network of randomly sized voids}},
author = {S. Chroeun and Y. Charles and Frédéric Christien and Alixe Dreano and Jonathan Mougenot and M. Gaspérini},
journal = {International Journal of Hydrogen Energy},
year = {2026},
month = jul,
doi = {10.1016/j.ijhydene.2026.156223},
url = {https://hal-emse.ccsd.cnrs.fr/emse-05761383v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Finite element modeling of transient hydrogen trapping in a network of randomly sized voids
AU - S. Chroeun
AU - Y. Charles
AU - Frédéric Christien
AU - Alixe Dreano
AU - Jonathan Mougenot
AU - M. Gaspérini
PY - 2026
DA - 2026/07/03
JO - International Journal of Hydrogen Energy
DO - 10.1016/j.ijhydene.2026.156223
UR - https://hal-emse.ccsd.cnrs.fr/emse-05761383v1
AB - An adaptation of the hydrogen transport model is proposed to model the transient trapping of hydrogen in a network of randomly sized voids at pressures beyond the validity of perfect gas. To achieve this, the randomly sized voids are replaced by constant size voids, the radius of which being defined by the statistical properties of the size distribution, and with the same trapping kinetics. It is especially shown that this equivalent radius is not equal to a simple volumetric average of the void radius. This homogenization approach allows to determine the spatiotemporal evolution of the amount of hydrogen trapped in all the voids as a function of diffusive hydrogen conditions. This model is implemented in Abaqus using a user subroutine. It is validated on a configuration of the literature, in which the voids are explicitly modeled in finite elements, and a parametric study on the model parameters is conducted.
SN - 0360-3199
SN - 1879-3487
ER -