FRACTURE TOUGHNESS TESTING IN IMPACT

The report deals with the measurement of plane strain fracture toughness in impact tests where inertial load effects influence load measurements derived from instrumentation of the tup and anvil of the testing machine. Load measurements have been determined using post yield strain gauges attached across the specimen notch and it has been found that the load on the specimen during the impact test is a simple function of the compliance of the speciman, the test machine and the impact velocity. In order to calculate the fracture load it is necessary to determine accurately the instant at which fracture initiates and this has been possible by monitoring voltage changes occurring in the plastic zone at the crack tip. Impact values calculated from the fracture load show good reproducibility and are in good agreement with values extrapolated from tests performed at lower strain rates.

• Corporate Authors:

  British Iron and Steel Research Association

  24 Buckingham Gate
  London SW1,   England 
• Authors:
  • Priest, A H
  • May, M J
• Publication Date: 0

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 26 p.
• Serial:
  • BISRA Open Report
  • Issue Number: 0
  • Publisher: British Iron and Steel Research Association

Subject/Index Terms

• TRT Terms: Cracking; Crash tests; Fracture mechanics; Fracture properties
• Uncontrolled Terms: Crack propagation
• Subject Areas: Marine Transportation; Materials; Research;

Filing Info

• Accession Number: 00013837
• Record Type: Publication
• Report/Paper Numbers: MG.C/46/69
• Files: TRIS
• Created Date: Mar 23 1971 12:00AM