Match: 
#6
Message: 
#3562
Date: 
Jun 22, 1995
From: 
gil(at)rassp.hac.com (Gil Alexander)
Subject: 
Rivet loads - update, more data (technical)


Randall,
         ... I forgot to mention that all of these figures are valid for
2024-T3  material, and probably would not be valid for other grades of
Aluminium.  Here is some more data of interest, that should be added to
complete the previous posting.


Following is the equivalent data for YIELD strength (in this case, defined
as a permanent set of 0.005 inch)

   YIELD strength of 3/32 MS20426AD flush rivets in 2024-T3 (values in lbs.)

Sheet thickness         Dimpled         Countersunk

0.032                   209             132

0.040                   209             153

0.063                   209             213


This is actually a worse % loss than the ultimate loads, giving a 33% loss
in 0.032, and a 27% loss in 0.040.  The previous post's figures were for
ultimate strength (failure), while the above are those loads that would
cause a small permanent set.


   YIELD strength of 1/8 MS20426AD flush rivets in 2024-T3 (values in lbs.)

Sheet thickness         Dimpled         Countersunk

0.040                   367             231 (*)

0.063                   506             321

(*) this is a "knife edge condition", and not approved.


        ... keep those loads in limits ... Gil Alexander


>Gil:
>
>Good post!  Finally some HARD DATA on machine countersinking vs
>dimpling. I _knew_ there was a good reason I've been plowing through
>all this chatter (especially MINE :-). Ok if I steal that for my
>"Portland RVators" newsletter?
>
>Randall Henderson
>RV-6

Randall,
                No problem .... the data is copyright free (paid for by our
tax $$$) ... just give credit to the guy that dug it out :^)

                ...... Gil Alexander, RV6A, #20701


End Msg: 
#6 

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