A Multi-resolution Experimental Methodology for Fatigue Mechanism Verification of Physics-based Prognostics

##plugins.themes.bootstrap3.article.main##

##plugins.themes.bootstrap3.article.sidebar##

Jian Yang Wei Zhang Yongming Liu

Abstract

An experimental methodology is proposed in this paper for mechanism verification of physics-based prognosis of mechanical damage, such as fatigue. The proposed experimental methodology includes multi-resolution in-situ mechanical testing, advanced imaging analysis, and mechanism analysis based on digital measurements. A case study is presented for fatigue crack growth mechanism investigation. In-situ fatigue testing at lower resolutions, i.e., optical microscopy, and digital image correlation is used to analyze the plastic deformation behavior and strain distribution near crack tips. In-situ fatigue testing under higher resolutions, i.e., scanning electron microscopy, and automatic image tracking is used to obtain detailed crack tip deformation and crack growth kinetics at the nanometer scales. Following this, the proposed experimental methodology is applied to two different metallic materials, aluminum alloys and steels. Very different experimental observations are observed and the underlying mechanisms are discussed in detail. The impact on the prognosis algorithm development is also discussed. Finally, the potential application of the proposed experimental methodology to other materials systems and to other types of mechanical damage is discussed.

How to Cite

Yang, J. ., Zhang, W. ., & Liu, Y. . (2012). A Multi-resolution Experimental Methodology for Fatigue Mechanism Verification of Physics-based Prognostics. Annual Conference of the PHM Society, 4(1). https://doi.org/10.36001/phmconf.2012.v4i1.2161
Abstract 52 | PDF Downloads 15

##plugins.themes.bootstrap3.article.details##

Keywords

PHM, fatigue, Physics based prognostics, multi-scale

References
Bouami, D., & De Vadder, D. (1986). Detection and measurement of crack closure and opening by an ultrasonic method. Engineering Fracture Mechanics, 23(5), 913–920. DOI:10.1016/0013-7944(86)90101-3

Campbell, G., & Lahey, R. (1984). A survey of serious aircraft accidents involving fatigue fracture. International Journal of Fatigue, 6(1), 25–30. DOI: 10.1016/0142-1123(84)90005-7

Farrar, C. R., & Lieven, N. a J. (2007). Damage prognosis: the future of structural health monitoring. Philosophical transactions. Series A, Mathematical, physical, and engineering sciences, 365(1851), 623–32. DOI: 10.1098/rsta.2006.1927

Fleck, N., & Shin, C. (1985). Fatigue crack growth under compressive loading. Engineering fracture mechanics, 21(1), 173–185. DOI: 0013-7944/85

Forsyth, P. J. E. (1962). A two stage process of fatigue crack growth. Crack Propagation: Proceedings of Cranfield Symposium. Cranfield (76–94), England: College of Aeronautics.

Laird, C. (1967). The influence of metallurgical structure on the mechanisms of fatigue crack propagation. Fatigue Crack Propagation, ASTM STP, 415, 131–180.

Macha, D. E., Corbly, D. M., & Jones, J. W. (1979). On the variation of fatigue-crack-opening load with measurement location. Experimental Mechanics, 19(6), 207–213. DOI: 10.1007/BF02324983

McClung, R. C., & Sehitoglu, H. (1989). On the finite element analysis of fatigue crack closure—1. Basic modeling issues. Engineering Fracture Mechanics, 33(2), 237–252. DOI:10.1016/0013-7944(89)90027-1

Paris, P. C., Gomez, M. P., & Anderson, W. E. (1961). A Rational Analytic Theory of Fatigue. Trend in Engineering, 13(1), 9–14.

Rice, J. (1968). A path independent integral and the approximate analysis of strain concentration by notches and cracks. Journal of Applied Mechanics, 35, 379– 386.

Sadananda, K. (1999). Analysis of overload effects and related phenomena. International Journal of Fatigue, 21, 233–246. DOI:10.1016/S0142-1123(99)00094-8

Shih, C. F. (1981). Relationships between the J-integral and the crack opening displacement for stationary and extending cracks. Journal of the Mechanics and Physics of Solids, 29(4), 305–326. DOI:10.1016/0022- 5096(81)90003-X.

Shih, T. T., & Wei, R. P. (1974). A study of crack closure in fatigue. Engineering Fracture Mechanics, 6(1), 19–32. DOI:10.1016/0013-7944(74)90044-7.

Singh, D. S., Srivastav, A., Gupta, S., Keller, E., & Ray, A. (2009). Ultrasonic measurement of crack opening load for life-extending control of mechanical structures. 2009 American Control Conference (210–215), June 10-12. Piscataway, NJ, USA: IEEE. DOI: 10.1109/ACC.2009.5160021.

Wolf, E. (1970). Fatigue crack closure under cyclic tension. Engineering Fracture Mechanics, 2(1), 37–45. DOI: 10.1016/0013-7944(70)90028-7.

Zhang, W., & Liu, Y. (2011). Plastic zone size estimation under cyclic loadings using in situ optical microscopy fatigue testing. Fatigue & Fracture of Engineering Materials & Structures, 34(9), 717–727. DOI: 10.1111/j.1460-2695.2011.01567.x.
Section
Technical Papers

Most read articles by the same author(s)

1 2 > >>