STRAIN ENERGY RELEASE RATE FOR A CRACK UNDER COMPLEX LOADING

This paper gives an expression for the energy release rate in an arbitrary direction for a crack subjected simultaneously to Mode I, Mode II and Mode III conditions. The energy release rate is computed using the elastic solution of a deflected crack, having a main branch and a propagation branch. The elastic solution for the anti-plane problem is easily obtained by use of complex variables. For the in-plane problem we use the limiting solution recently obtained. Using the critical energy release rate criterion, incipient paths of propagation as well as the fracture stresses of such a crack, were obtained from the maximum value of the energy release rate. Results are in close agreement with a few experimental results available in the literature. The energy release rate, in parametric form, can be used for any crack subjected to Modes I, II and III loading conditions. (Author)

• Corporate Authors:

  Watervliet Arsenal

  Watervliet, NY  United States  12189

  Army Armament Command

  Rock Island, IL  United States 
• Authors:
  • Hussain, M A
  • Pu, S L
• Publication Date: 1975-7

Media Info

• Pagination: 29 p.

Subject/Index Terms

• TRT Terms: Complex variables; Cracking; Energy; Equations; Formulas; Fracture mechanics; Loads; Mathematical models; Mathematical prediction; Mechanical elasticity; Rates; Strain (Mechanics); Stresses
• Uncontrolled Terms: Crack propagation; Experimental data; Loading
• Old TRIS Terms: Elastic theory; Formulas mathematics; Release; Releasing
• Subject Areas: Data and Information Technology; Energy; Geotechnology; Highways;

Filing Info

• Accession Number: 00093179
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: WVT-TR-75042 Tech. Rpt.
• Files: TRIS
• Created Date: Dec 3 1976 12:00AM