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how to apply a magnetic field and see the magnetostriction in the magnetostrictive material

Posted 2014/03/25 6:34 GMT-4 Low-Frequency Electromagnetics, Structural Mechanics Version 4.3b 4 Replies

Syeda Qadam
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Dear all,

I have a sphere of Terfenol-D in air as you know Terfenol-D is a magnetostrictive material, so when you apply a magnetic field its changes its shape.

I want to model this thing in COMSOL that i want to apply a certain magnetic field and see how the shape of the sphere is deformed and by how much ?

Does any one has any idea that how can i do that. I have attached a picture of the my model the middle sphere is Terfenol-D and the torus around is silica.

Regards
Syeda,
4 Replies Last Post 2017/05/03 3:26 GMT-4
Henrik Sönnerlind COMSOL Employee

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Posted: 1 decade ago 2014/03/25 8:19 GMT-4
Hi,

There is an instructive model called 'Nonlinear Magnetostrictive Transducer' in the Model Library.

www.comsol.com/model/nonlinear-magnetostrictive-transducer-6063

Regards,
Henrik
Hi, There is an instructive model called 'Nonlinear Magnetostrictive Transducer' in the Model Library. http://www.comsol.com/model/nonlinear-magnetostrictive-transducer-6063 Regards, Henrik
V P
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Posted: 1 decade ago 2015/10/26 1:27 GMT-4
Hi there,

I'm trying to solve a similar problem, however, I want to define the current density to change over time to see how displacement/strain of the magnetostrictive material varies over time. What is the best way to do this?

Also, I'm trying to use a time-dependent solver and when I run compute, it throws up an error as given below
---
Failed to find consistent initial values.
Last time step is not converged.
---
I am in the process of understanding how to solve such problems and any pointers would be useful.

Update 1. Now I have another error as below

---
Messages:
Nonlinear solver did not converge

Maximum number of Newton iterations reached

Time X#1.837969443133324e-08

Last time step is not converged

... 12 more
----
Are there any parameters that I'm missing to change while solving for a time-dependent study? Thanks

Cheers,
Varun.
Hi there, I'm trying to solve a similar problem, however, I want to define the current density to change over time to see how displacement/strain of the magnetostrictive material varies over time. What is the best way to do this? Also, I'm trying to use a time-dependent solver and when I run compute, it throws up an error as given below --- Failed to find consistent initial values. Last time step is not converged. --- I am in the process of understanding how to solve such problems and any pointers would be useful. Update 1. Now I have another error as below --- Messages: Nonlinear solver did not converge Maximum number of Newton iterations reached Time X#1.837969443133324e-08 Last time step is not converged ... 12 more ---- Are there any parameters that I'm missing to change while solving for a time-dependent study? Thanks Cheers, Varun.
Jeff Hiller COMSOL Employee

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Posted: 9 years ago 2016/07/01 15:00 GMT-4
At version 5.2a, the Structural Mechanics Module includes a pre-implemented interface for modeling magnetostriction: www.comsol.com/release/5.2a/structural-mechanics-module .
Best regards,
Jeff
At version 5.2a, the Structural Mechanics Module includes a pre-implemented interface for modeling magnetostriction: https://www.comsol.com/release/5.2a/structural-mechanics-module . Best regards, Jeff
建 韩
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Posted: 8 years ago 2017/05/03 3:26 GMT-4

Dear all,

I have a sphere of Terfenol-D in air as you know Terfenol-D is a magnetostrictive material, so when you apply a magnetic field its changes its shape.

I want to model this thing in COMSOL that i want to apply a certain magnetic field and see how the shape of the sphere is deformed and by how much ?

Does any one has any idea that how can i do that. I have attached a picture of the my model the middle sphere is Terfenol-D and the torus around is silica.

Regards
Syeda,


Hello, I'm also study magnetostrictive material, I want to study the nonlinear coupling stress constitutive, can you add my QQ contact 383156448 or email ： sxycyzhj@sina.cn

thank you

[QUOTE] Dear all, I have a sphere of Terfenol-D in air as you know Terfenol-D is a magnetostrictive material, so when you apply a magnetic field its changes its shape. I want to model this thing in COMSOL that i want to apply a certain magnetic field and see how the shape of the sphere is deformed and by how much ? Does any one has any idea that how can i do that. I have attached a picture of the my model the middle sphere is Terfenol-D and the torus around is silica. Regards Syeda, [/QUOTE] Hello, I'm also study magnetostrictive material, I want to study the nonlinear coupling stress constitutive, can you add my QQ contact 383156448 or email ： sxycyzhj@sina.cn thank you

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