INVESTIGADORES
CHAPETTI mirco Daniel
artículos
Título:
A technique to produce automatic welds with enhanced fatigue crack propagation lives under tranverse loading
Autor/es:
MIRCO DANIEL CHAPETTI; OTEGUI, JL
Revista:
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
Editorial:
Elsevier Ltd.
Referencias:
Año: 1997 vol. 70 p. 173 - 181
ISSN:
0308-0161
Resumen:
In order to contribute to the development of an automatic weld process that introduces a controlled degree of irregularity to the weld toe, as a means to enhance the development and interaction of cracks and improve fatigue resistance, the double arc rotating technique (DART) was developed. Bead-on-plate welds were fabricated using this method. Weld toes were fatigue tested by three point bending in the transverse and loading directions. The fatigue propagation behavior of cracks growing from the weld toes, and its relationship with defined geometric parameters, were modeled using a fracture mechanics model. Compared with standard straight welds, fatigue life improved up to 110% in te longitudinal direction. A fatigue life prediction method for weld with controlled toe irregularity, considering defined toe geometry parameters, is presented, and results are discussed.
