Spectrum fatigue behaviour of welded joints

• Published in: International journal of fatigue Vol. 17; no. 7; pp. 485 - 491
• Main Author: Blom, A.F.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.10.1995; Elsevier Science
• Subjects: Applied sciences; Exact sciences and technology; Fatigue; fatigue strength; fillet welds; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; residual stress relaxation; spectrum fatigue; fatigue strength; residual stress relaxation; spectrum fatigue; fillet welds; Bogie; MAG welding; Fatigue life; Stress analysis; Mechanical properties; Fatigue; Steel; Railway equipment; Stress relaxation; Fatigue test; Research program; Welded joint; Test method; Application; Residual stress
• ISSN: 0142-1123; 1879-3452
• DOI: 10.1016/0142-1123(95)00043-S

A five-year study of the spectrum fatigue behaviour of welded joints is briefly reviewed. The emphasis is on test data obtained under various load spectra, but a short description of material properties, weld processes and resulting defects is included. A round robin evaluation of different test institutes involved in the programme is mentioned, and the actual spectrum data obtained are discussed in terms of a statistical analysis to isolate the important test parameters. The data are also evaluated in terms of cumulative damage calculations and using a fracture mechanics model. Residual stress relaxation during the fatigue loading was monitored using repetitive X-ray diffraction studies. Finally, an application to full-scale testing of bogie beams is commented upon. This paper does not attempt to cover the entire programme in detail, but tries to briefly cover the total approach in the performed study and also highlights certain important results that were found during the course of this study.