Accession Number : ADA563455


Title :   Practical Application of Residual Stress Measurements on Maritime Vessels


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL AND AEROSPACE ENGINEERING


Personal Author(s) : Whitley, Dixon T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a563455.pdf


Report Date : Jun 2012


Pagination or Media Count : 99


Abstract : This thesis examines the practical application of portable X-ray diffraction to measure residual stresses on board active maritime platforms. These measurements will provide better understanding of structural failures in aluminum hulls and superstructures. The feasibility of this process was analyzed by comparing data from welded aluminum test samples using portable X-ray diffractometers from three different sources. The effects on residual stress from ultrasonic impact treatments were measured using laboratory X-ray diffraction. A comprehensive list of technical requirements for the purchase and deployment of a portable X-ray diffractometer was written. A case study for measurement of residual stresses on board a USN cruiser was developed.


Descriptors :   *ALUMINUM ALLOYS , *FAILURE(MECHANICS) , *MEASUREMENT , *NAVAL VESSELS , *PORTABLE EQUIPMENT , *RESIDUAL STRESS , *X RAY DIFFRACTION , ALUMINUM , CASE STUDIES , CRACKING(FRACTURING) , CRUISERS , DIFFRACTOMETERS , HULLS(MARINE) , IN SITU ANALYSIS , SUPERSTRUCTURES , THESES , ULTRASONICS , WELDED JOINTS


Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints
      Marine Engineering
      Nuclear Physics & Elementary Particle Physics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE