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 >