NEW ASPECTS OF FATIGUE AND FRACTURE MECHANICS

The significance of the results of Scanning Electron Microscope studies of the microstructural deformation and damage processes in different types of metals for the formulation of an engineering approach to the problem of fatigue and of its relation to fracture mechanics is discussed. The futility of attempts to develop a unique model of fatigue based either on physical theories of lattice defects or on mechanical theories of plastic strain accumulation is demonstrated, and the usefulness of fracture-mechanics concept applied to microcrack development and combined with probabilistic considerations based on order statistics is illustrated.

• Corporate Authors:

  George Washington Transportation Research Institute. Center for Intelligent Systems Research

  ,    

  Office of Naval Research

  Department of the Navy, 800 North Quincy Street
  Arlington, VA  United States  22217

  Naval Ship Systems Command

  Washington, DC  United States 

  Air Force Materials Laboratory

  Wright-Patterson Air Force Base
  Dayton, OH  United States  45433
• Authors:
  • Freudenthal, A M
• Publication Date: 1973-12

Media Info

• Features: References;
• Pagination: 63 p.

Subject/Index Terms

• TRT Terms: Aluminum alloys; Brass; Copper; Cracking; Deformation; Electron microscopes; Electron microscopy; Fatigue cracking; Fracture mechanics; Mechanical fatigue; Microcracking; Microstructure; Physiological fatigue; Steel; Structural analysis; Titanium
• Uncontrolled Terms: Crack propagation; Fatigue analysis; Fatigue life; Fracture; Microcracks
• Old TRIS Terms: Fatigue stress
• Subject Areas: Geotechnology; Highways; Marine Transportation; Materials;

Filing Info

• Accession Number: 00091772
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: TR-16 Tech. Rpt.
• Contract Numbers: N00014-67A-0214-0011
• Files: TRIS
• Created Date: Sep 10 1975 12:00AM