An experimental and numerical investigation into fatigue crack propagation of 350 WT steel subjected to semi-random cyclic loading


  1. Rushton, P.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Dalhousie Univ, Halifax NS (CAN) Dept of Civil Engineering
A variety of aspects in the fields to fracture mechanics, fatigue, and fatigue crack propagation are reviewed in the first five chapters of this report, as well as a number of concepts and methodologies employed in fracture control and repair. The information provided in these chapters will not only educate the reader, but also provide him or her with the tools necessary to perform a variety of fatigue- and fracture-related analyses. Chapte 4 contains a comprehensive review of a number of constant amplitude and variable amplitude fatigue crack growth models. There is inherently great variation amongst these models, with respect to modeling approach, parameters considered, the number of calibration parameters required (empirical or otherwise), relative ease of use, and the level of computational effort required. Unfortunately, few of these models bear any physical or practical significance and many will see only limited use due to their inherent complexity. Moreover, an all-encompassing fatigue crack growth model has yet to be developed, despite the enormous number of models currently available. Chapters 6 and 7 focus on the experimental testing program employed to investigate the fatigue crack growth of center-cracked 350WT steel specimens subjected to semi-random loading comprised of various combinations of intermittent tensile overloads and compressive underloads. TRUNCATED

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Fatigue crack growth;Fatigue cracks;Structural integrity;350WT steel
Report Number
DREA-CR-2000-154 — Contractor Report
Date of publication
01 Mar 2001
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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