AN EQUATION FOR FRACTURE ENERGY DETERMINATION BY DOUBLE-CANTILEVER CLEAVAGE

With the aid of elementary beam theory a Lagrangian equation of motion was developed to relate the crack velocity to cleavage energy in a double cantilevered single-crystal specimen when shear contributes significantly to the cleavage energy. For a constant cleavage energy the equation predicts that the square of crack length is proportional to time when the crack is long with respect to transverse specimen dimensions. For shorter cracks, crack length is proportional to time. (Author)

• Supplemental Notes:
  • Availability: Pub. in Jnl. of Applied Physics, v45 n6 p2768-2769 Jun 74.
• Corporate Authors:

  Iowa State University, Ames

  Engineering Experiment Station
  Ames, IA  United States  50011

  Aerospace Research Laboratories

  Wright-Patterson Air Force Base
  Dayton, OH  United States 
• Authors:
  • Hindman, D L
  • Jones, J T
  • Determan, W R
• Publication Date: 1973-12

Media Info

• Pagination: 3 p.

Subject/Index Terms

• TRT Terms: Cracking; Dynamic tests; Energy; Equations of motion; Fatigue cracking; Fracture mechanics; Lagrangian functions; Mechanical fatigue; Reprints; Rock crystals; Structural mechanics; Velocity
• Uncontrolled Terms: Crack propagation; Dynamic analysis
• Old TRIS Terms: Single crystals
• Subject Areas: Energy; Railroads;

Filing Info

• Accession Number: 00090730
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Jour Artic
• Contract Numbers: F33615-68-C-1034
• Files: TRIS
• Created Date: Jun 26 1975 12:00AM