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  USA  18015
  • Authors:
    • Badaliance, R
    • Hilton, P D
    • Hasselman, DPH
  • Publication Date: 1974

Media Info

  • Pagination: 16 p.

Subject/Index Terms

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