How does bolt size effect fatigue?
How does bolt size effect fatigue?
(OP)
It has come to my attention that we have been using fatigue data obtained from 1/2" bolts (grade 8). A recent test showed that larger bolts (same class/grade) can have a much reduced fatigue limit. I have been unable to find much information on how to account for size but have heard Eurocode 3 and some other codes provide recommendations. I am looking for good sources of information and recommendations to account for size for bolt fatigue.





RE: How does bolt size effect fatigue?
Some pointers:
Eurocode 3 Design of steel structures
Part 1-1 General rules and rules for building
Part 1-1/A1 General rules and rules for building Annexes D and K revised
Part 1-1/A2 General rules and rules for building Annexes G,H,J revised, N and Z
Part 1-2 Structural fire design
Part 1-3 Cold formed thin gauge members and sheeting
Part 1-4 The use of stainless steels
Part 2 Bridges and plated structures
Part 3-1 Towers, masts
Part 3-2 Chimneys
Part 4 Tanks, silos and pipelines
Part 5 Piling
Part 6 Crane structures
Part 7 Marine and maritime structures
Part 8 Agricultural structures
Eurocode 3 links:
http://www.conformance.co.uk/CE_MARKING/ce_cpd.html
http://www.setra.fr/euronormes/Anglais/Telechargements/EurocodesGb.PDF
Design software based on Eurocode 3:
http://www.sharewareconnection.com/play/k3718.html
Bolt selection / analysis software:
http://www.industrialtechnology.co.uk/1999/apr/boltscience.html
Fatigue analysis ( all types ):
http://www.mech.uwa.edu.au/DANotes/intro/contents.html.
http://www.mech.uwa.edu.au/DANotes/threads/home.html
http://www.mech.uwa.edu.au/DANotes/threads/fatigue/fatigue.html.
regards
Bluexcell
# . # Up all night again ....
~
RE: How does bolt size effect fatigue?
Good luck
Deeko