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Project Number 41
Date of Summary March 31, 1985
Subject Ultrasonic Inspection of Underwater Structural Joints
Performing Activity Drexel University
Principal Investigator Dr. Joseph L. Rose
Contracting Agency Office of Naval Research
Estimated Completion Complete
Description The objective was to show that a microprocessor, when used with a ultrasonic flaw detector, can reliably regulate an ultrasonic inspection process. The project is divided into two parts; the microprocessor systems development for ultrasonic testing and analysis and joint inspection concepts for offshore structures.
Progress Complete. A portable microprocessor oriented data acquisition system was used to demonstrate the benefit of microprocessors and ultrasonics in a field environment. A fatigue test was carried out at the National Aeronautics and Space Administration (NASA), Goddard Space Flight Center, on a 1/3 scale model K-joint (Project No. 34). The inspection technique was used to study damage detection. Additional fatigue tests were conducted on the K-joint in a joint project with NASA and the Federal Highway Administration (FHWA). NASA used the `Random Decrement` method and the FHWA used the acoustic emissions technique. Information received from this latest testing program was analyzed and a final report prepared.
Reports
AC (116 pages) File in Adobe's Portable Document Format (PDF) . Fuller, M. C., Nestleroth, J. B., Rose, J. L., A Proposed Ultrasonic Inspection Technique for Offshore Structures, Materials Evaluation, Journal of the American Society for Nondestructive Testing, Volume 41, No. 5, April 1983.
AD (7 pages) File in Adobe's Portable Document Format (PDF) . Fuller, M. C., Jeong, Y. H., Nestleroth, J. B., Rose, J. L., An Ultrasonic Global Inspection Technique for an Offshore K-Joint, Ultrasonics Research Laboratory, Drexel University, Philadelphia, Pennsylvania, Journal of the Society of Petroleum Engineering, AIME, April 1983.
AE (11 pages) File in Adobe's Portable Document Format (PDF) . Rose, J. L., Elements of a Feature-Based Ultrasonic Inspection System, Materials Evaluation, ASNDT, Volume 42, No. 2, pp. 210- 218. August, 1982.
AF (4 pages) File in Adobe's Portable Document Format (PDF) . Material Evaluations, Drexel University, Philadelphia, Pennsylvania, Volume 41, No. 11, pp. 1228-1229.
AG (6 pages) File in Adobe's Portable Document Format (PDF) . Nestleroth, J. B., Rose, J. L., Bashyam, M., Subramanian, K., Physically Based Ultrasonic Feature Mapping for Anomaly Classification in Composite Materials, Materials Evaluation, ASNDT, No. 43, April, 1985.
AH (30 pages) File in Adobe's Portable Document Format (PDF) . Rose, J. L., Jeong, Y. H., Avioil, M. J., An Ultrasonic Global Inspection Technique for an Offshore K-Joint, Ultrasonics Research Laboratory, Drexel University, Philadelphia, Pennsylvania, Submitted to the Society of Petroleum Engineering, May 1, 1981.
 

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