RT info:eu-repo/semantics/article
T1 Explicit implementation of hydrogen transport in metals
A1 Díaz Portugal, Andrés
A1 Alegre Calderón, Jesús Manuel
A1 Cuesta Segura, Isidoro Iván
A1 Zhang, Zhiliang
K1 Hydrogen diffusion
K1 Coupled mechanical/diffusion modelling
K1 Explicit time integration
K1 ABAQUS subroutines
K1 Ingeniería mecánica
K1 Mechanical engineering
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales
K1 Materials
K1 Materiales de construcción
K1 Building materials
AB 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.
PB Elsevier
SN 0020-7403
YR 2024
FD 2024-07
LK http://hdl.handle.net/10259/8921
UL http://hdl.handle.net/10259/8921
LA eng
NO 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).
DS Repositorio Institucional de la Universidad de Burgos
RD 16-may-2024