CRITICAL EXPERIMENTS, MEASUREMENTS AND ANALYSES TO ESTABLISH A CRACK ARREST METHODOLOGY FOR NUCLEAR PRESSURE VESSEL STEELS

A two-dimensional, finite-difference, dynamic analysis of crack propagation and arrest is developed. The analysis has been applied to the wedge-loaded rectangular DCB specimen. Preliminary results of the two-dimensional analysis, particularly the crack velocity-arrest length relation, are very similar to those previously obtained with the one-dimensional treatment. Two "critical" tests of the dynamic/energy conservation analysis of crack arrest have been performed. Measurements of crack propagation and arrest in Homalite-100 performed at the University of Washington have been compared with one-dimensional calculations employing the KD-velocity dependence of this material measured independently at the University of Maryland. The calculations are in surprisingly good accord with the measurements of crack speed, arrest length and the local stress intensity. In addition, measurements of crack propagation and arrest in wedge- and machine-loaded, contoured DCB specimens of AISI 4340 are compared with calculations using the KD (V) previously derived from wedge-loaded rectangular DCB-test pieces. These experiments support the view that KD(V) is geometry and loading independent. Efforts to develop a testing procedure were centered on the LEFM size requirements for rectangular-DCB test pieces.

  • Supplemental Notes:
    • FOURTH QUARTERLY PROGRESS REPORT - TASK 62. Prepared for the Division of Reactor Safety Research, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission.
  • Corporate Authors:

    Battelle Columbus Laboratories

    505 King Avenue
    Columbus, OH  USA  43201
  • Authors:
    • Hahn, G T
    • Gehlen, P C
    • Hoagland, R G
    • Kanninen, M F
    • Popelar, C
    • Rosenfield, A R
  • Publication Date: 1975-11

Media Info

  • Features: References;
  • Pagination: 54 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00128651
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: BMI-1939
  • Contract Numbers: W-7405-eng-92
  • Files: TRIS
  • Created Date: Jan 14 1976 12:00AM