Looking for a non-magnetic, strong, easily glued material

[SamsarandaParticipant @samsaranda]

Don, glad my input was of use. Dave W

[Jouke van der VeenParticipant @joukevanderveen72935]

Interesting topic!

I would like to see a reference to software used to compare relative permeabilities of the different materials and as a result a list of these values. I assume it must have been rather a search on the Internet than a theoretical calculation.

Nice to read about a book of Frans de Waal about chimpanzee politics in this topic. Remember he is a Dutchman from origin! 😉

[HopperParticipant @hopper]

And now that we have a winner for this one, what will be the next quest? The best sock to make a puppet from?

[John HaineParticipant @johnhaine32865]

…..
I have now run some tests on magnetic prototyping software and it seems that the key metric is (magnetic) Relative Permeability and it turns out that "non-magnetic" stainless steel (e.g. 316L), 1050 Aluminium and Nylon all have a magnetic Relative Permeability of very close 1. …..

Well, who'd a – thunkit! Frankly you don't need "magnetic prototyping software" for that, it was obvious at the beginning. See Wikipedia – could have saved 3 pages of threads and given you your answer in minutes.

[CirclipParticipant @circlip]

Posted by Hopper on 30/04/2022 08:41:18:

And now that we have a winner for this one, what will be the next quest? The best sock to make a puppet from?

 

I bet he's looking down, having a good laugh at that one.

 

Regards Ian.

Edited By Circlip on 30/04/2022 10:30:16

[SillyOldDufferModerator @sillyoldduffer]

Posted by Hopper on 30/04/2022 08:41:18:

And now that we have a winner for this one, what will be the next quest? The best sock to make a puppet from?

Hopper refers to a Forum phenomenon called a 'Sock Puppet'. This is where an individual creates two or more accounts and uses them to post comments supporting his own views. The aim is to create the illusion that controversial views are independently supported, when they aren't.

Sock-puppetry is arrogantly dishonest and damages the reputation of individuals caught doing it. In the same boat as cheating at cards – a mind-set capable of doing it can't be trusted.

Dave

[Donald MacDonald 1Participant @donaldmacdonald1]

Posted by Jouke van der Veen on 30/04/2022 08:39:07:

Interesting topic!

I would like to see a reference to software used to compare relative permeabilities of the different materials and as a result a list of these values. I assume it must have been rather a search on the Internet than a theoretical calculation.

Nice to read about a book of Frans de Waal about chimpanzee politics in this topic. Remember he is a Dutchman from origin! 😉

"Finite Element Method Magnetics"

You guys have WAY too much time on your hands. No offence but you'd make excellent Chimps!

D

[Anonymous]

Posted by Donald MacDonald 1 on 30/04/2022 11:18:37:

…but you'd make excellent Chimps!

Only because you've made monkeys of us with your "carefully considered", but inaccurate, initial requirements.

Andrew

[HopperParticipant @hopper]

Posted by Circlip on 30/04/2022 10:18:24:

Posted by Hopper on 30/04/2022 08:41:18:

And now that we have a winner for this one, what will be the next quest? The best sock to make a puppet from?

I bet he's looking down, having a good laugh at that one.

Regards Ian.

Edited By Circlip on 30/04/2022 10:30:16

Yes I am sure he is up there having a good chuckle. Puts me in mind of this classic:

Posted by John Stevenson on 03/10/2016 11:45:25:

Sock puppets are generated by a complex formula.

Roughly speaking its OCD divided by EGO, multiplied by the number of consecutive days welded to an armchair

[Jouke van der VeenParticipant @joukevanderveen72935]

Why a FEM calculation?

I think magnetic permeability is an isotropic property. But I may be wrong, for “anisotropic” materials.

I think You made a FEM calculation to model your application but you used an isotropic value for magnetic permeability, just from literature. Perhaps we are chimpanzees, but not stupid. 😉

[KWILParticipant @kwil]

Maybe it is not Donald Macdonald 1 afterall

Edited By KWIL on 30/04/2022 12:23:08

[Anonymous]

Posted by Jouke van der Veen on 30/04/2022 12:03:52:

…magnetic permeability is an isotropic property…

Electrical steels are often anisotropic. The permeabiliry varies with direction according to the grain structure and how the material is processed.

Andrew

[Danny M2ZParticipant @dannym2z]

I do not log in often nowadays but I do follow the forum as a keen model engineer and machine user.

This thread and the way that it has deteriorated into sarcasm and superfluous comments is a prime example of why I do not log in very often!

Please Neil, moderators and new owners, get things back on track.

Logging out.

* Danny *

[Jouke van der VeenParticipant @joukevanderveen72935]

Andrew, thank you. I am aware of that.

But I am fairly sure that such anisotropy (e.g. introduced by rolling) was not taken into account in the FEM calculations performed by topic starter.

But TS is wright: we have to much time available (for this subject).

Therefore we should follow Danny M2Z.

Edited By Jouke van der Veen on 30/04/2022 13:16:40

[Anonymous]

Posted by Danny M2Z on 30/04/2022 12:41:25:

This thread and the way that it has deteriorated into sarcasm and superfluous comments ….

Now, if you would only ask yourself why that is rather than knee-jerk blaming of the respondents …

[Robert ButlerParticipant @robertbutler92161]

Peter Greene +1

Robert Butler

Edited By Robert Butler on 30/04/2022 21:29:57

[Michael GilliganParticipant @michaelgilligan61133]

My Google-fu must be fading

I have just searched for the phrase “magnetic prototyping software”

… and Google found just one result.

Can anyone enlighten me ?

MichaelG.

.

Edited By Michael Gilligan on 30/04/2022 22:17:05

[Neil WyattModerator @neilwyatt]

Drop 'software' from the query.

Neil

[speelwerkParticipant @speelwerk]

– Copper & Brass
I also have some copper & brass but of course neither of them are silver in colour.

Perhaps silverplated copper or brass would be OK. Niko.

[Author]

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