Accession Number : ADA193403

Title :   The Influence of Weld Metal Properties, Weld Geometry and Applied Load on Weld System Performance.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Matic, Peter ; Jolles, Mitchell I.

Report Date : 25 FEB 1988

Pagination or Media Count : 31

Abstract : Alloy development programs have significantly increased the ductility of steels available for ship structures. Design decisions regarding the optimum use of these alloys often reflect limitations imposed by weld performance considerations and available analytical methods. In this investigation, a sufficiently general analytical methodology, based on the distribution of strain energy density, is applied to the computational prediction of weld performance and fracture. Fracture at a material point coincides with a critical strain energy density value associated with the continuum fracture toughness of the material. The critical strain energy density value for each component of the weld metal, heat affected zone and base metal system are obtained from uniaxial tension test data. The role of weld crown, weld metal strength and applied load to butt welded panel performance are examined parametrically. The results suggest that particular combinations of these parameters may offer significant advantages in weld performance.

Descriptors :   *ALLOYS, *STEEL, *WELDS, AXES, BASE METAL, BUTT WELDING, COMPUTATIONS, DUCTILITY, EXPERIMENTAL DATA, FRACTURE(MECHANICS), GEOMETRY, MATERIALS, MATHEMATICAL PREDICTION, METHODOLOGY, OPTIMIZATION, PANELS, SHIP STRUCTURAL COMPONENTS, STRENGTH(MECHANICS), TENSION, TOUGHNESS, UNIDIRECTIONAL, WELD METAL.

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE