STATIC AND DYNAMIC FRACTURE TOUGHNESS OF 9% NI STEEL

The paper describes an investigation of the toughness properties of 9%Ni steel at loading rates occurring in ship structures. Dynamic properties have been lacking, and it has been the aim of this investigation to compare the dynamic and static fracture toughness for a large number of production heats. The investigation demonstrated that the fracture toughness at - 196 degree C of 9%Ni steel is not impaired by high strain rates. This is of importance when this steel is used in shipbuilding in tanks for the transportation of LNG, as dynamic stresses may occur in the tank system because of wave-induced loads through the interaction between the hull and the tank and the cargo sloshing about in partially filled tanks. In the construction of independent LNG ship tanks to the 'leak-before-failure' principle, it is a requirement that the critical crack sizes should be evaluated for realistic loading rates.

• Supplemental Notes:
  • Dynamic Frac Toughness, Intl Conf, V1, London, England, 5-7 July 1976.
• Corporate Authors:

  Welding Institute

  Abingdon Hall
  Cambridge CB1 6AL,   England 
• Authors:
  • Tenge, P
  • Karlsen, A
  • Mauritzon, B
• Conference:
  • Dynamic Frac Toughness, Intl Conf, V1, London, England, 5-7 July 1976.
• Publication Date: 1977

Media Info

• Features: Appendices;
• Pagination: p. 195-205

Subject/Index Terms

• TRT Terms: Fracture mechanics; Fracture properties; Loads; Materials tests; Shipbuilding materials; Steel
• Uncontrolled Terms: Fracture
• Old TRIS Terms: Loading rates; Steel testing
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00165407
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Paper 12 Conf Proc
• Files: TRIS
• Created Date: Nov 23 1977 12:00AM