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Couple strain with ion concentration?
Posted 22.07.2010, 21:59 GMT-4 Chemical Reaction Engineering, Materials, Studies & Solvers, Structural Mechanics 2 Replies
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I've been modelling ion transport in a porous material using the chemical engineering module. I would like to also model an induced strain in the material that is linearly proportional to the local ion concentration (swelling/dilation, similar to a thermal expansion but dependant on concentration not temperature). How do I modify a standard Hooke's law stress-strain relationship to include this additional term? I also have access to the solid mechanics and MEMs application modules.
2 Replies Last Post 31.03.2014, 23:13 GMT-4
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Posted:
1 decade ago
Hi,
I did similar work with you. In my case, I put partial molar volume instead of coefficient of thermal expansion. And I used concentration value as temperature. You can check a paper 'Numerical Simulation of Intercalation-Induced Stress in Li-Ion Battery Electrode Particles' by Xiangchun Zhang.
Thanks
I did similar work with you. In my case, I put partial molar volume instead of coefficient of thermal expansion. And I used concentration value as temperature. You can check a paper 'Numerical Simulation of Intercalation-Induced Stress in Li-Ion Battery Electrode Particles' by Xiangchun Zhang.
Thanks
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Posted:
1 decade ago
Hi C.Lim,
I am, working on same problem i.e. intercalation stress. I followed your suggestion like putting partial molar volume as expansion coefficient and concentration as temperature. However, my stress value is not exceeding yield point so as a result I am not getting any plastic strain. Can you help me to answer:
1- Did you use the "normalized concentration as temperature" i.e. the C/Cmax (value range 0 ~ 1 within material? OR you used actual concentration?
2- How about reference temperature? Did you use zero reference temperature?
3- Lastly, which mechanical boundary conditions did you use and any solver settings are needed?
Please help me.
regards,
Hina
I am, working on same problem i.e. intercalation stress. I followed your suggestion like putting partial molar volume as expansion coefficient and concentration as temperature. However, my stress value is not exceeding yield point so as a result I am not getting any plastic strain. Can you help me to answer:
1- Did you use the "normalized concentration as temperature" i.e. the C/Cmax (value range 0 ~ 1 within material? OR you used actual concentration?
2- How about reference temperature? Did you use zero reference temperature?
3- Lastly, which mechanical boundary conditions did you use and any solver settings are needed?
Please help me.
regards,
Hina