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Anonymous Poster

Shackles

11/18/2007 11:06 AM

Why the diameter of a 'bow or dee shackle pin' is more than the diameter of it's body? I need a technical answer based on bending moments and shear strength of materials.
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MUKULMAHANT
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#1

Re: Shackles

11/18/2007 11:17 AM

Get a mathematics Researcher do it .May be will get him a Ph.D.

Finite Elements Analysis may be the right point to start.

But first go through "Formulas on Stress and Strain "-Roark
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user-deleted-1105
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#2

Re: Shackles

11/18/2007 11:25 AM

I'd guess the design of these things would have been evolved empirically as they have been in use since iron and steel working first came into being... maybe even before then with bronze.

I expect analysis will reveal that they are a good shape...but i doubt they are a good shape because of the analysis.

Why is a longbow or boomerang the shape it is....?

Del

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Beej50
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#3

Re: Shackles

11/19/2007 3:16 AM

There are two reasons for the pin being (about) double the diameter of the 'dee'

1) The pin is in bending moment.

2) There are two arms (components) of the 'dee' AND they are in tension!

BUT, do you know what the hole in the head end of the pin is for? Answers on a postcard to ......

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#4
In reply to #3

Re: Shackles

11/19/2007 3:33 AM

The hole is there because they ran out of material?

Maybe they had some spare holes and thought it would be a way of using them up to free some space in stores?

or maybe so you can tie it to avoid losing/dropping the darned thing.

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#5
In reply to #4

Re: Shackles

11/19/2007 3:41 AM

I'M SO DISAPOINTED IN YOU CAT!

Cat's should know about 'mousing' a shackle. It's to thread a piece of wire through to stop the pin coming undone!

You played into my hands there cobber!

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#6
In reply to #5

Re: Shackles

11/19/2007 3:58 AM

....

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Beej50
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#7
In reply to #6

Re: Shackles

11/19/2007 6:35 AM
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DAG
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#8
In reply to #7

Re: Shackles

11/19/2007 8:17 AM

I'm laughing out loud this mornining! Thanks for the humor, guys!

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#10
In reply to #7

Re: Shackles

11/19/2007 12:09 PM

Cute!! I think you got the cat under control now.

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#11
In reply to #7

Re: Shackles

11/19/2007 3:33 PM

Man with gun... 'Have you got the shackles?'

Kitten... <gulp> ' No I always walk that way'

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#9
In reply to #4

Re: Shackles

11/19/2007 9:22 AM

<maybe so you can tie it to avoid losing/dropping the darned thing.>

That's it!
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