期刊
METALS
卷 11, 期 4, 页码 -出版社
MDPI
DOI: 10.3390/met11040541
关键词
crack tip deflection; finite element method; plasticity-induced fatigue crack growth; retardation phenomenon
资金
- Spanish Institution: Ministry for Science and Technology (MICYT) [MAT2002-01831]
- Spanish Institution: Ministry for Education and Science (MEC) [BIA2005-08965]
- Spanish Institution: Ministry for Science and Innovation (MICINN) [BIA2008-06810]
- Spanish Institution: Ministry for Economy and Competitiveness (MINECO) [BIA2011-27870]
- Spanish Institution: Junta de Castilla y Leon (JCyL) [SA067A05, SA111A07, SA039A08, SA132G18]
- Spanish Institution: Fundacion Samuel solorzano Barruso of the University of Salamanca (USAL) [ps/9-2019]
This article investigates the retardation effect in plasticity-induced fatigue crack growth rate for low-medium strength steel, finding that the retardation effect increases with an increase in the initial kinked crack tip angle and length, as well as with a decrease in the stress intensity factor (SIF) range.
This article studies the retardation effect in plasticity-induced fatigue crack growth rate for a low-medium strength steel, due to the appearance of microdeflections in the crack path. To this end, the finite element method was used to model the crack with its kinked tip under several stress intensity factor (SIF) ranges. The results allowed a calculation (after a small number of cycles) of the fatigue crack propagation rate for the multiaxial and uniaxial fatigue configurations at the microscopic level. It was observed that the retardation effect rose with an increase in the initial kinked crack tip angle, an increase in the initial projected kinked crack tip length, and with a decrease in the SIF range.
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