DYNAMIC FRACTURE-RESISTANCE TESTING AND METHODS FOR STRUCTURAL ANALYSIS

The fracture properties of structural steels are sensitive to strain rate; this characteristic is responsible for most catastrophic failures of structures in these materials. The potential for the initiation of fast fracture can be predicted by the recently developed technology of linear elastic fracture mechanics (LEFM) which has provided the basis for an analytical approach to fracture resistance and structural integrity. Unfortunately, for routine engineering design use, the basic material parameter for plane-strain fracture toughness is either impossible or too expensive to obtain by direct measurement. Therefore, to make fracture mechanics a viable engineering design tool, empirical correlations between practical dynamic test results and the basic parameters are needed. The attributes and limitations of the Charpy, Drop Wright-Nil Ductility Transition Temperature, Drop Weight Tear, and Dynamic Tear tests are discussed with respect to providing information useful in structural integrity analyses. (Author)

• Corporate Authors:

  Naval Research Laboratory

  4555 Overlook Avenue, SW
  Washington, DC  United States  20375-5320
• Authors:
  • Lange, E A
• Publication Date: 1976-4-27

Media Info

• Pagination: 28 p.

Subject/Index Terms

• TRT Terms: Crash tests; Drop tests; Fracture mechanics; Structural analysis
• Subject Areas: Marine Transportation; Materials; Research;

Filing Info

• Accession Number: 00141617
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NRL-7969 Final Rpt.
• Files: TRIS
• Created Date: Nov 17 1976 12:00AM