13th International Conference on Fracture June 16–21, 2013, Beijing, China -5- during cycling loading. As a result, it has been shown that the value of the stored energy has to accumulate during the fatigue test and has to be equal to zero when the crack reaches the critical length corresponding to the sample failure. So, it can be used as a criterion for prediction of damage. The set of developed mathematical algorithms and methods of the experiment allows us to develop in a future engineering methods for analyzing the current crack state inside of real constructions in a wide range of applied loads. Acknowledgements This work was supported by grant of President of the Russian Federation for support of young Russian scientists and leading scientific schools (MD-2684.2012.1) and RFBR (grant № 11-01-96005). References [1] X.D. Li, H. Zhang, D.L. Wu, X. Liu, J.Y. Liu, Adopting lock-in infrared thermography technique for rapid determination of fatigue limit of aluminum alloy riveted component and affection to determined result caused by initial stress. Int J Fatigue, 36 (2012) 18-23. [2] A.A. Shanyavskiy, Bezopasnoe ustalostnoe razrushenie elementov aviakonstrukcii. Sinergetika v ingenernih prilogeniyah [Safe fatigue damage of aircraft construction elements. Synergetics in engineering applications]. Ufa, (2003) 803. [3] M. Bannikov, A. Terekhina, O. Plekhov, Vestnik Permskogo gosudarstvennogo tehnicheskogo universiteta. Mehanika, 2 (2011) 14. [4] A.Yu. Fedorova, M.V. Bannikov, O.A. Plekhov, Infrared thermography study of the fatigue crack propagation. Fracture and Structural Integrity, 21 (2012) 46-53. [5] J.Hodowany, G. Ravichandran, A.J. Rosakis and P.Rosakis, Partition of plastic work into heat and stored energy in metals. Exp Mech, 40(2) (2000) 113-123. [6] O. Plekhov, S. Uvarov, O. Naimark, Theoretical and experimental investigation of dissipated and stored energy ratio in iron under quasi-static and cyclic loading. Strength of materials, 1(391) (2008) 101-105. [7] Yu.G. Matvienko, V.G. Avramenko, Dynamics of temperature field in the plastically deformed metal. II. Specimen with a crack. Deformation and fracture of materials, 10 (2009) 2-10.
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