2026-04-21T10:50:10Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/89212024-04-13T00:05:15Zcom_10259_8923com_10259_5086com_10259_2604com_10259_4201col_10259_8924col_10259_4505

Díaz Portugal, Andrés Alegre Calderón, Jesús Manuel Cuesta Segura, Isidoro Iván Zhang, Zhiliang 2024-04-12T11:41:54Z 2024-04-12T11:41:54Z 2024-07 0020-7403 http://hdl.handle.net/10259/8921 10.1016/j.ijmecsci.2024.109195 Hydrogen embrittlement prediction demands a numerical framework coupling a damage model with local hydrogen concentration. The inherent nonlinearity in hydrogen-stress-damage interactions challenges convergence in implicit schemes. To address this limitation, we propose a novel chemical potential-based explicit formulation for simulating hydrogen transport in metals. Our approach exploits a heat transfer analogy, linking mechanical and hydrogen transport via inelastic energy as a heat source. By employing chemical potential rather than lattice concentration, our method eliminates the need for user-defined boundary conditions and hydrostatic stress gradient determination. We integrate a VUMATHT subroutine for diffusion modelling and a VUMAT subroutine for material behaviour, coupling stress and strain rates as a heat source for diffusion. Validating against a classical benchmark, we compare our explicit approach with hydrogen concentration-based methods in ABAQUS Standard and Comsol Multiphysics. Stability conditions are assessed for different mesh sizes and mass scaling densities and the capabilities of our approach are showcased for 3D simulations of notched tensile specimens. Our framework offers a novel and efficient pathway for integrating hydrogen transport with user-defined material behaviour, promising advancements in hydrogen-informed damage models. The authors gratefully acknowledge funding from projects PID2021-124768OB-C21 and TED2021-130413B-I00. This work was also supported by the Regional Government of Castilla y León (Junta de Castilla y León) through the project SAFEH2 (BU040P23). This research has received co-funding from the European Commission and the Clean Hydrogen Partnership under Grant Agreement No 101137592. This Partnership receives support from the European Union’s Horizon Europe Research and Innovation program, Hydrogen Europe and Hydrogen Europe Research. A. Díaz wishes to thank the Nanomechanical Lab of NTNU for providing hospitality during his research stay. Zhiliang Zhang wants to acknowledge the financial support from the Research Council of Norway via the Helife project (344297). application/pdf eng Elsevier International Journal of Mechanical Sciences. 2024, V. 273, 109195 https://doi.org/10.1016/j.ijmecsci.2024.109195 Attribution-NonCommercial-NoDerivatives 4.0 Internacional http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Hydrogen diffusion Coupled mechanical/diffusion modelling Explicit time integration ABAQUS subroutines Ingeniería mecánica Ingeniería civil Materiales Materiales de construcción Mechanical engineering Civil engineering Materials Building materials Explicit implementation of hydrogen transport in metals info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion International Journal of Mechanical Sciences 273