Re: Detail of AAR Box car - flexing

Anthony Thompson <thompson@...>

Bob Webber wrote:
Incorrect. The first Liberty ships had a major problem with just
this type of issue - they broke because they did not flex (being
welded instead of riveted, and being the first mass produced ships to
be done in this fashion and being sent to the Russian Convoys didn't
help). A number of ships were lost before they worked out the
Incorrect. The problem was that welding was done without changing ship design. This example is familiar in the field of fracture mechanics, where it it is used to show the importance of both fracture resistance of the steel, and of proper design.

Anthony Thompson
Dept. of Materials Science & Engineering
University of California, Berkeley

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