Lug Analysis under transverse loading
Lug Analysis under transverse loading
(OP)
Hi,
I have found out, in this thread thread2-210058: Lug stress analysis, that there was another ESDU, 06021, about strength of lugs under transverse load.
I found out recently that there could be a huge difference of the allowable transverse force wether you are using Bruhn/Niu Graphs(multiple curves for different material) or ESDU 91008 graphs (one curve for all Aluminum and one curve for all Steel.)
My company is still in the process of getting back its membership to ESDU, so I wasn't able to get my hand on ESDU 06021 for now, but I was wondering if anyone of you had. Would it be possible (legal?) for any of you to discuss their conclusions? Do they get new curves to get Ktru somewhere between ESDU 91008 and Bruhn/Niu or closer to one or the other?
Or do you know if they published some article on that subject somewhere?
Thank you very much for your inputs.
I have found out, in this thread thread2-210058: Lug stress analysis, that there was another ESDU, 06021, about strength of lugs under transverse load.
I found out recently that there could be a huge difference of the allowable transverse force wether you are using Bruhn/Niu Graphs(multiple curves for different material) or ESDU 91008 graphs (one curve for all Aluminum and one curve for all Steel.)
My company is still in the process of getting back its membership to ESDU, so I wasn't able to get my hand on ESDU 06021 for now, but I was wondering if anyone of you had. Would it be possible (legal?) for any of you to discuss their conclusions? Do they get new curves to get Ktru somewhere between ESDU 91008 and Bruhn/Niu or closer to one or the other?
Or do you know if they published some article on that subject somewhere?
Thank you very much for your inputs.





RE: Lug Analysis under transverse loading
A good source on Lugs is the Bell structural Design manual.
It is very detailed source of practical design.
Cheers !
RE: Lug Analysis under transverse loading
ESDU 91008, on the other hand, suggest to take only one curve for Aluminum alloy and one curve for Steel alloy. The results from those two curves can be huge and can make a difference between a negative margin of safety and a positive one. ESDU 06021 seems to have derived some new curves based mostly on FEM which take into account the difference in the material properties. So I was guessing those curves could replace those of Hobblit and Melcon that we find in Bruhn and Niu. But won't know until I can see those curves and all the theory behind them. That is why I wanted to know here if any of you had been in contact with this new ESDU.
RE: Lug Analysis under transverse loading
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Nert
RE: Lug Analysis under transverse loading
RE: Lug Analysis under transverse loading
See also thread31-226131: 7050 Plate Lug Curves and the reference to the NTIS stress manual. The lug analysis section appears to be very good.
Ed.