SLOW CRACK GROWTH AND FAILURE PREDICTION OF BRITTLE MATERIALS SUBJECTED TO A TRANSIENT THERMAL STRESS

The effect of slow crack growth on the failure conditions of brittle material subjected to a transient thermal stress in a stress-corrosive environment was investigated. A numerical analysis procedure was developed for calculating the instantaneous values for crack length and transient stress intensity factors of a glass rod subjected to a sudden decrease in ambient temperature under convective heat transfer conditions. The analysis demonstrated that slow crack growth significantly decreases the thermal conditions required for catastrophic failure. A form of crack growth instability is predicted at values of the stress intensity factor well below K sub IC, where the rate of increase of stress intensity factor is such that catastrophic failure becomes inevitable. (AUTHOR)

• Supplemental Notes:
  • Also published in Proceedings of an International Conference on Prospects of Fracture Mechanics, Delft University of Technology, (Netherlands), 24-28 June 74, pp 579-592.
• Corporate Authors:

  Lehigh University

  Ceramics Research Laboratory
  Bethlehem, PA  United States  18015
• Authors:
  • Badaliance, R
  • Hilton, P D
  • Hasselman, DPH
• Publication Date: 1974

Media Info

• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Stresses
• Uncontrolled Terms: Crack propagation; Stress intensity factors
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00126027
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: ARO-10722-12-MC
• Contract Numbers: DA-ARO-D31-124-73G45
• Files: TRIS
• Created Date: Oct 18 1975 12:00AM