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Pretension needed to prevent separation
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Source：Internet Author：Unknow Pubdate：2008-04-02
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WiltshireYeoman (Aerospace)
5 Nov 07 10:22
Could anyone recommend a reliable resource/text book/software package that would allow me to analyze a bolted joint to determine the amount of pretension required to prevent separation for a given load?
TVP (Materials)
5 Nov 07 10:35
VDI 2230 Systematic Calculation of Bolted Joints is the most comprehensive source for this type of information. Software such as SR1 from Hexagon has been created based on VDI 2230. Perform a keyword search of Eng-Tips for a sampling of problems that have been previously discussed on this subject. The following are links to the Beuth and Hexagon websites from which you can obtain VDI 2230 and SR1, respectively.
http://www.beuth.de/cmd?level=tpl-Langanzeige&smoid=58914179&searchaccesskey=main&limitationtype=&languageid=en 字串7
http://www.hexagon.de/sr1_e.htm
freckle (Aerospace)
6 Nov 07 4:05
Some possibiltities:
I use most of the times:FED-STD-H28/2B (1994)
"Federal Standard
Screw-thread standards for Federal Services
Section 2"
Appendix B is a Design method of Unified Screw Threads.
This public document can be dowloaded from:
http://assist.daps.dla.mil/quicksearch/
You could also try Mike Niu's Airframe Stress Analysis and Sizing
Or the Fokker Stress Handbook TH3.561 might be used (proprietary document).
See also the thread:
http://www.eng-tips.com/viewthread.cfm?qid=197206&page=2
==========================
Stressing to the maxx.....
CoryPad (Materials)
6 Nov 07 8:58
I concur with TVP regarding VDI 2230. SR1 from Hexagon is good, and here are some other software packages worth considering: 字串9
MDESIGN bolt by Tedata
http://www.tedata.com/index.php?id=54&L=2
MITCalc
http://www.mitcalc.com/en/pr_boltcon.htm
As far as books go, here are the best ones:
Handbook of Bolts and Bolted Joints edited by Bickford and Nassar
An Introduction to the Design and Behavior of Bolted Joints by Bickford
Both books are published by Dekker/Taylor and Francis:
http://www.taylorandfrancis.com Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
desertfox (Mechanical)
6 Nov 07 14:14
Hi Yeoman
Have a look at these sites they may help:-
http://www.roymech.co.uk/Useful_Tables/Screws/Preloading.html
http://www.co-design.co.uk/dpg/bol/bol3.html
http://pergatory.mit.edu/2.007/software_tools/Excel/general/Bolts_preload.xls 字串3
http://www.utm.edu/departments/engin/lemaster/Machine%20Design/Lecture%2030.pdf
regards
desertfox
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