ON EFFECTS OF THICKNESS ON DUCTILE CRACK GROWTH IN MILD STEEL

Critical crack opening displacement (COD) values have been examined for a range of specimen thicknesses. The COD at the initiation of fracture is found to be constant, given a plane-strain crack-tip stress-state, whereas the COD at maximum load delta max decreases with increasing thickness. The loads required to produce instability are found to vary with thickness, in a way analogous to behavior observed under linear elastic conditions. Crack growth under constant load for a range of specimen thicknesses has been examined, and failure has been found to occur at loads below that associated with delta max, the minimum load per unit thickness required to cause failure decreasing with specimen thickness.

• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Green, G
  • Knott, J F
• Publication Date: 1975-6

Media Info

• Features: References;
• Pagination: p. 167-183
• Serial:
  • Journal of Mechanics and Physics of Solids
  • Volume: 23
  • Issue Number: 3
  • Publisher: Pergamon Press, Incorporated

Subject/Index Terms

• TRT Terms: Alloy steel; Cracking; Fracture mechanics; Steel castings
• Uncontrolled Terms: Crack propagation
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00128888
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Feb 4 1976 12:00AM