User login

Navigation

You are here

Emilio Martínez Pañeda's blog

Emilio Martínez Pañeda's picture

An electro-chemo-mechanical framework for predicting hydrogen uptake in metals due to aqueous electrolytes

Dear iMechanicians, I hope that our latest paper is of interest. We develop an electro-chemo-mechanics framework that enables, for the first time, to quantify hydrogen uptake for any environment. 
Predicting hydrogen uptake

https://doi.org/10.1016/j.corsci.2022.110681

Emilio Martínez Pañeda's picture

Griffith-based analysis of crack initiation location in a Brazilian test

Dear iMechanicians, I hope that the paper below is of interest, given the wide use this experiment. Essentially, we use the generalised Griffith criterion to determine the crack initiation location in the Brazilian split test, establishing the conditions (jaws geometry and material properties) that lead to a valid test. We find that the range of conditions where the Brazilian test is valid is much narrower than previously thought, with current standards being inappropriate for a wide range of rock-like materials.

Emilio Martínez Pañeda's picture

A stress-based poro-damage phase field model for hydrofracturing of creeping glaciers and ice shelves

Dear iMechanicians, I hope that you find the paper below of interest. Glaciology is a challenging and exciting area and I think there is a need to bring more mechanics and physics into it

A stress-based poro-damage phase field model for hydrofracturing of creeping glaciers and ice shelves

Theo Clayton, Ravindra Duddu, Martin Siegert, Emilio Martínez-Pañeda

Engineering Fracture Mechanics 272, 108693 (2022)

Emilio Martínez Pañeda's picture

A coupled phase field formulation for modelling fatigue cracking in lithium-ion battery electrode particles

Dear iMechanicians - I hope this is of interest. We develop a model for predicting fatigue cracking in lithium-ion battery electrode particles. Existing models were limited to simulating one half charge cycle. 


Journal of Power Sources 544, 231805 (2022)

Emilio Martínez Pañeda's picture

A phase field electro-chemo-mechanical formulation for predicting void evolution at the Li–electrolyte interface in all-solid-state batteries

Dear iMechanicians - I hope this is of interest. We develop a phase field-based electro-chemo-mechanical model for predicting void evolution and current hot-spots in all-solid-state batteries as a function of applied pressure, charge and material properties. 

Journal of the Mechanics and Physics of Solids 167, 104999 (2022)

Emilio Martínez Pañeda's picture

Cracking predictions of lithium-ion battery electrodes by X-ray computed tomography and modelling


Dear iMechanicians,

I hope that the following work is of interest. We conduct the first multi-physics fracture simulation of Li-Ion battery electrodes. Phase field was combined with advanced X-ray CT imaging to predict degradation of realistic microstructures. 

Emilio Martínez Pañeda's picture

Postdoc position at Imperial College London on hydrogen assisted fracture

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the prediction of hydrogen embrittlement using computational methods. The Research Associate will work under the supervision of Dr Emilio Martínez-Pañeda and the project is supported by TENARIS. 

 

Emilio Martínez Pañeda's picture

Phase field fracture predictions of microscopic bridging behaviour of composite materials

Dear iMechanicians,

I hope that you find the following paper of interest. We conducted 3D (phase field) fracture simulations that explicitly resolve the microstructure of composites, predicting the role of key mechanisms such as fibre bridging (i.e., an output of the model, not an input!). 

Emilio Martínez Pañeda's picture

Postdoc position at Imperial College London on predicting hydrogen embrittlement

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the prediction of hydrogen-assisted failures using computational methods. The Research Associate will work under the supervision of Dr Emilio Martínez-Pañeda and the project is supported by the Electric Power Research Institute (EPRI).

Emilio Martínez Pañeda's picture

Postdoc on hydrogen embrittlement and corrosion at Imperial College London: experimental

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the UKRI Future Leaders Fellowship grant NEWPHASE. The project, led by Dr Emilio Martínez-Pañeda, aims at tackling pressing material degradation challenges at the interface between mechanics and chemistry. 

Emilio Martínez Pañeda's picture

A phase field model for hydrogen-assisted fatigue

Dear iMechanicians. I hope that you find the below work interesting - we have developed the first phase field formulation for hydrogen assisted fatigue. Fatigue crack nucleation and growth is predicted for arbitrary geometries, loading histories, and H contents. Virtual S–N curves are also obtained. You can check it here: https://doi.org/10.1016/j.ijfatigue.2021.106521

Emilio Martínez Pañeda's picture

Postdoc position at Imperial College London on phase field modelling of corrosion

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the development of new phase field-based models for predicting localised corrosion (pitting and stress corrosion cracking). The work is part of a wider project, led by Dr Emilio Martínez-Pañeda, that builds upon our recent JMPS work (https://doi.org/10.1016/j.jmps.2020.104254).

Emilio Martínez Pañeda's picture

An assessment of phase field fracture: crack initiation and growth

Dear iMechanicians,

We have contributed to the Special Issue organised by the Royal Society on occasion of the centenary of Griffith's seminal paper with a paper revisiting phase field fracture methods and their connection with conventional fracture mechanics theory. I hope that you find it of interest. (https://royalsocietypublishing.org/doi/10.1098/rsta.2021.0021)

Image

Emilio Martínez Pañeda's picture

Postdoc position at Imperial College London on multi-physics modelling

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the EPSRC project NEXTGEM. The project, led by Dr Emilio Martínez-Pañeda, aims at combining phase field methods and electro-chemo-mechanics modelling to resolve the scientific challenges holding back the applicability of hydrogen embrittlement models.

Emilio Martínez Pañeda's picture

Phase field predictions of microscopic fracture and R-curve behaviour of fibre-reinforced composites

Dear iMechanicians,

I hope that the following work is of interest to you. We combine the phase field method with cohesive zone modelling to predict the fracture behaviour of fibre-reinforced composites across scales.

Emilio Martínez Pañeda's picture

A phase field formulation for dissolution-driven stress corrosion cracking

Dear iMechanicians, I hope that our latest JMPS paper is of interest to you. We show how the phase field paradigm can be extended to model localised corrosion (aqueous electrolyte-solid interface) and the associated damage mechanisms. 

C. Cui, R. Ma, E. Martínez-Pañeda. A phase field formulation for dissolution-driven stress corrosion cracking. Journal of the Mechanics and Physics of Solids 147, 104254 (2021)

https://www.sciencedirect.com/science/article/pii/S0022509620304622

Emilio Martínez Pañeda's picture

Postdoc position at Imperial College London on hydrogen embrittlement testing

The Mechanics of Infrastructure Materials research group are looking to hire a Postdoctoral Research Associate (PDRA) to work in the EPSRC New Horizons project NanoHMAT. The project, led by Dr Emilio Martínez-Pañeda, aims at exploring high-risk high-gain approaches for developing a new generation of hydrogen embrittlement-resistant materials.

Emilio Martínez Pañeda's picture

Phase field modelling of fracture and fatigue in Shape Memory Alloys

Dear iMechanicians. I hope that the following paper is of interest to you. We develop the first phase field formulation for fracture (and fatigue) in Shape Memory Alloys. Its potential is demonstrated by solving a variety of paradigmatic 2D and 3D boundary value problems, from R-curves to fatigue cracking of a NiTi biomedical stent.

M. Simoes, E. Martínez-Pañeda. Phase field modelling of fracture and fatigue in Shape Memory Alloys. Computer Methods in Applied Mechanics and Engineering 373 (2021) 113504

Emilio Martínez Pañeda's picture

Analysis of the influence of microstructural traps on hydrogen assisted fatigue

Dear iMechanicians,

I hope some of you find of interest our latest Acta Mat. paper. We show that the concept of "beneficial traps" can enlarge by an order of magnitude the range of "safe loading frequencies" at which hydrogen embrittlement is not observed. 

Analysis of the influence of microstructural traps on hydrogen assisted fatigue

Rebeca Fernández-Sousa, Covadonga Betegón, Emilio Martínez-Pañeda

Acta Materialia 199, 253-265 (2020). Link

Emilio Martínez Pañeda's picture

Fracture in distortion gradient plasticity

Dear iMechanicians,

I hope that the following paper is of interest to you. We use for the first time Gurtin (2004) gradient plasticity theory to investigate crack tip mechanics, revealing the existence of an elastic core adjacent to the crack tip, resembling a dislocation-free zone. Also, we show that the combination of strain gradient hardening and dislocation blockage can rationalise brittle fracture in elastic-plastic material interfaces.

Emilio Martínez Pañeda's picture

A phase field model for elastic-gradient-plastic solids undergoing hydrogen embrittlement

Dear iMechanicians,

I hope some of you find our recent JMPS paper interesting. We combine phase field fracture, hydrogen transport and strain gradient plasticity to provide a modern rationale to the mechanism of hydrogen enhanced decohesion. 

A phase field model for elastic-gradient-plastic solids undergoing hydrogen embrittlement

Philip K. Kristensen, Christian F. Niordson, Emilio Martínez-Pañeda

Journal of the Mechanics and Physics of Solids, 143, 104093 (2020)

Emilio Martínez Pañeda's picture

Generalised boundary conditions for hydrogen transport at crack tips

Dear iMechanicians,

I hope the present work is of interest to you. We present a new formulation for resolving the electrochemical-diffusion interface in hydrogen embrittlement modelling 

E. Martínez-Pañeda, A. Díaz, L. Wright, A. Turnbull

Generalised boundary conditions for hydrogen transport at crack tips

Corrosion Science 173, 108698 (2020)

https://www.sciencedirect.com/science/article/pii/S0010938X20305345

Emilio Martínez Pañeda's picture

Analysis of hydrogen permeation tests considering two different modelling approaches for grain boundary trapping in iron

Dear iMechanicians,

I hope the present work on two-scale modelling of hydrogen permeation is of interest to you. A post-print is available at www.empaneda.com

A. Díaz, I. I. Cuesta, E. Martinez-Pañeda, J. M. Alegre
Analysis of hydrogen permeation tests considering two different modelling approaches for grain boundary trapping in iron
International Journal of Fracture 223, 17-35 (2020)

Pages

Subscribe to RSS - Emilio Martínez Pañeda's blog

Recent comments

More comments

Syndicate

Subscribe to Syndicate