Four point bend fixtures
were designed and manufactured. The wheel grips are designed to hold
the specimen with minimal constrain to ovalization effects while providing
enough area to distribute the load. In addition, the grips are free to
rotate, allowing for lateral movement of the specimen as the curvature
increases.
Four point flexure tests
were performed on composite tubes to experimentally determine
moment-curvature relationships for varying constituent materials, lay-ups,
and wall thickness. The specimens tested were provided by Hydril, Inc. Results and data that were analyzed are contained in 2
conference publications at OMAE July 2002 and at ASC in October 2002. These
publications will not be available on the MMS web page. |