Investigation into the fatigue strength of fillet welded assemblies of E-36-4 steel as a function of the penetration of the weld subjected to tensile and bending loads

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Welding Journal (Miami); (United States)

OSTI ID:6471235

Janosch, J J ^[1]

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1. Inst. de Soudure, Ennery (France)

This study is aimed at evaluating the effect of incomplete penetration on the fatigue behavior of fillet welded assemblies subjected to tension and bending. Its purpose is to evaluate more precisely the conditions of slow extension of microcracks during the initiation stage. The preferred sites for crack initiation at the weld root or the weld toe were determined by using the finite element method. The experimental program, including 120 fatigue tests, was conducted on 10 mm and 30 mm thick E-36-4 steel plates welded with gas metal arc welding (GMAW) and shielded metal arc welding (SMAW) processes. The results evidenced a propagation phase of short cracks, which may represent 30 to 90% of the fatigue life, and the existence of a critical size of incomplete joint penetration had no significant effect on the fatigue life of fillet welded assemblies subjected to tension and bending. The numerical calculations, made with the finite element method, have permitted the modeling of the crack propagation paths as a function of the size of incomplete penetration and the determination of the relations Kl = f(a/t) for each zone of failure of the fillet weld.

• OSTI ID: 6471235
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:8; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ARC WELDING
CALCULATION METHODS
CRACK PROPAGATION
FABRICATION
FATIGUE
FINITE ELEMENT METHOD
FRACTURE MECHANICS
GAS METAL-ARC WELDING
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL STRUCTURES
MECHANICAL TESTS
MECHANICS
NUMERICAL SOLUTION
SHIELDED METAL-ARC WELDING
STEELS
TESTING
WELDED JOINTS
WELDING