Hi Bev - I would point them to RJ Klein Wassink's book "Soldering In
Electronics", ISBN 0-901150-24. In the Mechanical Properties Section 8.4 it
states "From the data in section 4.7.2 it is obvious that a normal soldered
connection on a printed board is not well suited to withstanding a
permanent mechanical load."

And in Section 4.7.2 Creep, there is some good data on the creep properties
of solder backing up that statement.

Dave Hillman
Rockwell Collins
[log in to unmask]

On Tue, Nov 14, 2017 at 2:12 PM, BEV CHRISTIAN <[log in to unmask]>
wrote:

> TechNetters,
> A fellow ex-BlackBerry employee sent me the following query. I obviously
> no longer have access ot the search capabilities I had at BB.  Can anyone
> offer any suggestions for papers that will meet his needs?  I mean I know
> the reason why, but he wants a paper that proves it.
>
> I need help with locating a couple of good papers and research studies
> that explain why designs that place a constant tensile or shear load on
> board connectors(USB, HDMI, RCA, AC inlet etc.) are a bad idea. Can you
> point me to a couple of papers on this ? Thanks.
>
> Regards,
> Bev
>
> Sent from Mail for Windows 10
>