Modeling of Fatigue Crack Propagation
Author:
Jiang Yanyao1, Feng Miaolin1
Affiliation:
1. University of Nevada, Mechanical Engineering Department (312), Reno, NV 89557
Abstract
Fatigue crack propagation was modeled by using the cyclic plasticity material properties and fatigue constants for crack initiation. The cyclic elastic-plastic stress-strain field near the crack tip was analyzed using the finite element method with the implementation of a robust cyclic plasticity theory. An incremental multiaxial fatigue criterion was employed to determine the fatigue damage. A straightforward method was developed to determine the fatigue crack growth rate. Crack propagation behavior of a material was obtained without any additional assumptions or fitting. Benchmark Mode I fatigue crack growth experiments were conducted using 1070 steel at room temperature. The approach developed was able to quantitatively capture all the important fatigue crack propagation behaviors including the overload and the R-ratio effects on crack propagation and threshold. The models provide a new perspective for the R-ratio effects. The results support the notion that the fatigue crack initiation and propagation behaviors are governed by the same fatigue damage mechanisms. Crack growth can be treated as a process of continuous crack nucleation.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference45 articles.
1. Socie, D., 1993, “Critical Plane Approaches for Multiaxial Fatigue Damage Assessment,” Advances in Multiaxial Fatigue, ASTM STP 1191, D. L. McDowell and R. Ellis eds., American Society for Testing and Materials, Philadelphia, PA, pp. 7–36. 2. Paris, P., Gomez, M. P., and Anderson, W. E., 1961, “A Rational Analytical Theory of Fatigue,” The Trend in Engineering, University of Washington, 13, pp. 9–14. 3. Paris, P. C., and Erdogan, F., 1963, “A Critical Analysis of Crack Propagation Laws,” ASME J. Basic Eng., D85, pp. 528–534. 4. Wheeler, O.
, 1972, “Spectrum Loading and Crack Growth,” ASME J. Basic Eng., 94, pp. 181–186. 5. Gilbert, C., Dauskardt, R., and Ritchie, R., 1997, “Microstructural Mechanisms of Cyclic Fatigue-Crack Propagation in Grain-bridging Ceramics,” Ceram. Int., 23, pp. 413–418.
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