Thesis (Ph.D.)--University of Tulsa, 1995. / Includes bibliographical references (leaves 209-217).

Thesis (Ph.D.)--University of Tulsa, 1995. / Includes bibliographical references (leaves 209-217).

Thesis (Ph.D.)--University of Wollongong, 2003. / Typescript. Includes appendices. Bibliographical references: leaf 251-266.

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Danyluk, Steven; Committee Member: Melkote, Shreyes; Committee Member: Rohatgi, Ajeet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 65-68). Also available via the Internet.

Thesis (M.S.)--Brigham Young University. Dept. of Civil and Environmental Engineering, 2006. / Includes bibliographical references (p. 235-236).

Thesis (Ph. D.)--Ohio State University, 2007. / Title from first page of PDF file. Includes bibliographical references (p. 201-215).

Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2009 / Sophisticated measurement methods are currently used extensively to determine the residual stresses in materials. The capabilities of the Hole-Drilling Method, Debro-30 Ultrasonic System and Digital Shearography to determine residual stresses have been explored. The accuracy of these techniques in measuring residual stresses in mild steel specimens is thoroughly examined and discussed. The results obtained from the experiments are consistent with the expected outcomes. Related literature review, experimental procedures, results and their discussion have been outlined. It is hoped that the information provided in this thesis will be of importance to end users, especially engineers and technologists who use these non-destructive methods to evaluate residual stresses in components and materials.

Among semi-destructive methods of measuring residual stresses in elastic materials, the blind hole-drilling strain-gage method is one of the best because it is simple, economical and accurate. It is based on the measurement of strains disturbed by machining a small diameter shallow hole in the test piece. The strains measured in three known directions permit the determination of the direction and magnitude of principal stresses and subsequently of any stress in any direction. This thesis presents the investigation of residual stresses in the longitudinal direction of a welded fabricated steel tube of 22 inch diameter, relating to a series of holes drilled in one half of a circular section of the tube. An initial assumption, substantiated later, was the existence of a uniform field of residual stresses through the thickness of the tube. Several methods for determining calibration coefficients are documented. The values of longitudinal stresses once computed are presented in a smooth curve. A straight line approximation is reconnnended for use in further studies of the effects of residual stresses on failure loads.

Master of Science / Department of Civil Engineering / Robert J. Peterman / With aging and deterioration of bridges, evaluation of existing conditions of their structural elements becomes vital to engineers and public officials when deciding how to repair or replace the structures. The ability to obtain necessary information on these conditions is often expensive and time consuming, especially for concrete bridges where the reinforcement is not available for inspection. Employing the surface-strain relief method could allow for accurate evaluation of aged or damaged prestressed members. The surface-strain relief method was developed to measure initial or pre-existing strains in a concrete member. It involves relieving the strain in the member and measuring the change in strain. Two methods were tested—one used a linear electrical-resistance strain gage and a three-inch-diameter diamond concrete core bit to cut around the gage, and the second method used a laser-speckle imaging device and a diamond cutting wheel to create notches perpendicular to the axis of maximum strain. Both methods measured the change in strain and related it to within 10 percent of the actual fse. The method of cutting notches and the laser-speckle imaging device provided a simpler method to be implemented in the field, while the coring method achieved a higher level of accuracy and precision.