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modelling a crack in AC/DC

Posted Apr 7, 2017, 11:54 a.m. EDT Low-Frequency Electromagnetics Version 5.2a 2 Replies

Ross Underhill
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We do a lot of eddy current calculations and are often interested in response to a crack. Currently, the only way we have to do this is to put in a very thin region and declare it to be air. This, of course results in a very fine mesh or a mesh with very distorted elements. It would be nicer to just declare that Jnormal to a boundary was zero. I've tried using a transition boundary condition but that doesn't produce the right result. Any ideas on how the current boundary condition could be imposed? Typically we work in mf as there are no external current sources.
2 Replies Last Post Apr 11, 2017, 3:30 p.m. EDT
Nirmal Paudel Tribhuvan University/Electrical Engineering
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Posted: 8 years ago Apr 10, 2017, 2:12 p.m. EDT
Hi Ross,

The small cracks in the metal structures can be modeled in Magnetic and Electric Fields (MEF) physics using the combination of "Magnetic Continuity" plus "Electric Insulation". Unfortunately, this is not available in the Magnetic Fields physics.

Hope this helps.

Best Regards,
Nirmal
Hi Ross, The small cracks in the metal structures can be modeled in Magnetic and Electric Fields (MEF) physics using the combination of "Magnetic Continuity" plus "Electric Insulation". Unfortunately, this is not available in the Magnetic Fields physics. Hope this helps. Best Regards, Nirmal
Ross Underhill
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Posted: 8 years ago Apr 11, 2017, 3:30 p.m. EDT
Thanks. Gave it a try and got comparable results a bit faster. I'll explore this a bit more
Thanks. Gave it a try and got comparable results a bit faster. I'll explore this a bit more

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