Imperial College London
Portrait Picture

DrEmilioMartinez-Paneda

Faculty of Engineering, Department of Civil and Environmental Engineering

Visiting Reader
 
 
 
//

Contact

 

+44 (0)20 7594 8188e.martinez-paneda Website

 
 
//

Location

 

249Skempton BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Hageman:2023:10.1016/j.cma.2023.116235,
author = {Hageman, T and Martínez-Pañeda, E},
doi = {10.1016/j.cma.2023.116235},
journal = {Computer Methods in Applied Mechanics and Engineering},
pages = {1--30},
title = {A phase field-based framework for electro-chemo-mechanical fracture: Crack-contained electrolytes, chemical reactions and stabilisation},
url = {http://dx.doi.org/10.1016/j.cma.2023.116235},
volume = {415},
year = {2023}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We present a new theoretical and computational framework for modelling electro-chemo-mechanical fracture. The model combines a phase field description of fracture with a fully coupled characterisation of electrolyte behaviour, surface chemical reactions and stress-assisted diffusion. Importantly, a new physics-based formulation is presented to describe electrolyte-containing phase field cracks, appropriately capturing the sensitivity of electrochemical transport and reaction kinetics to the crack opening height. Unlike other existing methods, this approach is shown to accurately capture the results obtained with discrete fracture simulations. The potential of the electro-chemo-mechanical model presented is demonstrated by particularising it to the analysis of hydrogen embrittlement in metallic samples exposed to aqueous electrolytes. The finite element implementation takes as nodal degrees-of-freedom the electrolyte potential, the concentrations of relevant ionic species, the surface coverage, the concentration of diluted species, the displacement field and the phase field order parameter. Particular attention is devoted to improve stability and efficiency, resulting in the development of strategies for avoiding ill-constrained degrees of freedom and lumped integration schemes that eliminate numerical oscillations. The numerical experiments conducted showcase the ability of the model to deliver assumptions-free predictions for systems involving both free-flowing and crack-contained electrolytes. The results obtained highlight the role of electrolyte behaviour in driving the cracking process, evidencing the limitations of existing models.
AU  - Hageman,T
AU  - Martínez-Pañeda,E
DO  - 10.1016/j.cma.2023.116235
EP  - 30
PY  - 2023///
SN  - 0045-7825
SP  - 1
TI  - A phase field-based framework for electro-chemo-mechanical fracture: Crack-contained electrolytes, chemical reactions and stabilisation
T2  - Computer Methods in Applied Mechanics and Engineering
UR  - http://dx.doi.org/10.1016/j.cma.2023.116235
UR  - http://hdl.handle.net/10044/1/105660
VL  - 415
ER  -
Download