Shear force on torqued down bolts
Shear force on torqued down bolts
(OP)
What is the influence of a certain torque towards the shear force in bolts, when the bolt needs to hold something in place; in such a manner that there is a shear force acting on the bolt as well as pure tension resulting from the torque.
I want to know how to check a certain force in an assembly, of which I don't know the name in english.
Dutch: "stuikspanning" => babelfish translation: butt force, which seems a rather questionable translation.
It is the force that stretches or shears thin plates in case of a too large force on a "single shear" or "double shear" connection (with eg. bolts or rivets).
How do I calculate the equivalent stress in the bolts (Von Mises, Huber & Hencky?) ?
and how will this result correlate to the max allowable "butt force" of the plates and the bolts ?
I hope I have explained my question good enough, if not please ask and I will try to explain further...
I want to know how to check a certain force in an assembly, of which I don't know the name in english.
Dutch: "stuikspanning" => babelfish translation: butt force, which seems a rather questionable translation.
It is the force that stretches or shears thin plates in case of a too large force on a "single shear" or "double shear" connection (with eg. bolts or rivets).
How do I calculate the equivalent stress in the bolts (Von Mises, Huber & Hencky?) ?
and how will this result correlate to the max allowable "butt force" of the plates and the bolts ?
I hope I have explained my question good enough, if not please ask and I will try to explain further...





RE: Shear force on torqued down bolts
Try roymech here:
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Ted
RE: Shear force on torqued down bolts
From this reference, it may be yield stress in English.
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Ted
RE: Shear force on torqued down bolts
Chris
www.value-design-consulting.co.uk
RE: Shear force on torqued down bolts
what you are looking for is maybe stress strain compression f.i. of polymer / plastic materials, ISO 3386 etc.. Cf. attached pdf, then check for the standards. // Can't upload, so in short: goto http://www.c-bogmans.nl/producten.html, page 1, point c): Standard for stuikspanning. Then google ISO 3386, f.i. with JSP. //
For bolt connection: Applied torque + given coeff. of friction (your application) makes up a tensional force in the bolt connection, check with relevant tables for your bolting system / bolting standard.
Allowable ssc --> Sorry, don't own those standards, hopefully you got that somewhere..
Regards
Roland
RE: Shear force on torqued down bolts
RE: Shear force on torqued down bolts
I do not think Machinery's Handbook (I've got the 21st edition) is a good reference for bolt calculations,
Also I do not have VDI 2230 although it is on my wish list (as is Bickford's Handbook of bolts and bolted joints).
Is the maximum allowable shear stress the same for an unloaded bolt as well as for a bolt loaded in tension?
Assuming of course all other conditions are OK - shear stress in the threads, Bolt loaded in the elastic region (about 2/3 of proof stress), ...
RE: Shear force on torqued down bolts
Can you please provide a sketch of your bolted joint or diagram showing the external loads the joint has to withstand, if so it might help us to help you and avoid us having to speculate.
desertfox
RE: Shear force on torqued down bolts
Conclusion: preload does not reduce shear capacity of the bolt.
Ted
RE: Shear force on torqued down bolts
http://www.eng-tips.com/faqs.cfm?fid=600
In particular, a good detailed FREEreference for structural joints, which tend to be loaded in shear:
http://w
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RE: Shear force on torqued down bolts
Chris
www.value-design-consulting.co.uk