Accession Number : AD0769217

Title :   Generalized Procedures for the Use of Plane Strain and Elastic-Plastic Fracture Mechanics Options in the Modernization of Nuclear Standards.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Loss,F. J. ; Hawthorne,J. R. ; Pellini,W. S.

Report Date : 18 SEP 1973

Pagination or Media Count : 26

Abstract : In the design of nuclear power plants and the selection of required structural materials, the assurance of reliability in operation is an essential consideration. The need for analytical criteria for defining the adequacy of fracture toughness specifications is particularly acute for pressure vessel materials. In the modernization of nuclear codes, there is additional need to include the full range of fracture mechanics options for system design, that is, to include elastic-plastic and fully plastic fracture mechanics, as well as the linear-elastic procedures. This report describes recent developments in the means for defining the full range of plane strain, elastic-plastic, and plastic fracture mechanics options available to the designer. Comparisons are made between these options and the fracture toughness requirements of the ASME Nuclear Code (Section III). Existing dynamic plane strain data for structural metals are analyzed in concert with dynamic tear test trends.

Descriptors :   (*Nuclear power plants, Structures), (*Pressure vessels, *Fracture(Mechanics)), Reactor materials, Elastic properties, Plastic properties, Strain(Mechanics), Steel, Stress strain relations

Subject Categories : Structural Engineering and Building Technology
      Nuclear Power Plants and Fission Reactor Eng
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE