期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 25, 期 10, 页码 3935-3940出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2011.04.025
关键词
Cyclic loading; Crack tip; Ductile crack growth; Fatigue; Finite element method; Large deformations; Numerical simulation; Paris-like equation
资金
- Ministry for Science and Technology (MCYT) [MAT2002-01831]
- Ministry for Education and Science (MEC) [BIA2005-08965]
- Ministry for Science and Innovation (MCINN) [BIA2008-06810]
- Junta de Castilla y Leon (JCyL) [SA067A05, SA111A07, SA039A08]
Numerical analyses of plasticity-induced fatigue crack growth (FCG) were performed for high-strength steels. FCG proceeds by large crack tip deformations promoting transfer of material from the tip apex to the crack flanks, thus rendering plastic crack growth based on plastic deformations without bond breaking or material splitting at the crack tip (Laird-Smith mechanism of FCG by blunting and re-sharpening). Plastic FCG rates (da/dN)(p) were obtained and numerical results were fitted with a Paris-like equation (da/dN)(p) = C Delta K(m). An experimental validation of the simulations was performed by comparing the numerical Paris-like equation with real (experimental) Paris equations in the steels. (C) 2011 Elsevier Ltd. All rights reserved.
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