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Author Topic: Stiffener Fasteners  (Read 4319 times)

FEAUser

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Stiffener Fasteners
« on: April 26, 2013, 07:24:33 AM »
Is there a mechanism to analyze the fasteners that attach the stiffeners on a stiffened panel?  I changed the spacing on the options tab, but it didn't seem to have an affect on the stiffener sizes.  I'm looking for the easiest way to determine the fastener size and spacing to attach the stiffeners.

Thanks,

John

James

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Re: Stiffener Fasteners
« Reply #1 on: May 17, 2013, 05:25:33 PM »
The fastener spacing and weight on the options tab will only adjust the panel weight to include the added weight of the fasteners.

Do you have a FEM with stiffeners discretely meshed? If so there is a way to get the pull-off and shear loads at the FEM joint. For this to work, you will need the fastener pull-through and shear allowables.

If it is a smeared panel (or a Non-FEA project) you may be able to use the bonded joint capability to get the peel and interlaminar shear stress at the stiffener to skin interface.

http://hypersizer.com/help/#Failure/joint-bonded.php

If you can back-out a bearing you can use the bearing/bjsfm analysis to size the composite skin.

http://hypersizer.com/help/#Failure/BJSFM/joint-bolted-jump.php

I hope this is helpful.

-James