Calculated Model of Endurance Limit Estimation Based on Structural-Strain Analysis of the Critical Condition of Ferrite-Perlite Steels with Macrocracks in Ship Structures

Abstract:

In this study, a structural-deformation analysis of the process of crack development is performed, on the basis of which an engineering methodology is developed for assessing the endurance limit and resource of large-sized structures. A simple analytical dependence (correlation аналитическая зависимость) was obtained, which allows one to determine the critical size of macrocracks for ferritic-pearlitic steels without using the well-known Griffith formula. The results of calculating the cracks critical lengths of various steels depending on their yield strength are presented. The analytical dependence of the calculation of the fatigue limit for the most dangerous symmetric loading cycle according to the standard set of mechanical characteristics of ferrite-pearlite steel is presented. The obtained results make it possible to calculate the endurance limit of structural elements of marine equipment and other structures subject to cyclic loads

• Periodical: Key Engineering Materials (Volume 887)
• Pages: 627-633
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.887.627
• Online since: May 2021
• Authors: K.A. Molokov, V.V. Novikov, G.P. Turmov, Ya.R. Domashevskaya
• Keywords: Bulwark, Crack Length, Critical Deformation, Endurance Limit, Ferrite-Perlite Steel, Mathematical Model, Welded Joint

References

[1] K.M. Yamaleev, L.R. Gumerova, Structural aspects of oil pipeline metal failure, Ufa: Academy of Sciences of Bashkortostan Republic, Guillem (2011) 144.

[2] V.V. Novikov, G.P. Turmov, O.E. Surov, A.P. German, K.A. Molokov, M.V. Kitaev, Damage and calculation analysis of the strength of ship structures: Monograph, Vladivostok: FEFU (2020) 266.

[3] C. Jordan, C. Cjchran, In Service Performance of Structural Details, SSC272, USA (1978) 188.

[4] Y. Akita, Statistical Trend of Ship Hall Failure PRADS, 83. The 2nd International Simposium on practical Design in Shipbuilding. Tokio, Secut (1983) 619-624.

[5] N.V. Barabanov, N.A. Ivanov, V.V. Novikov, G.P. Shemendyuk, Damage and ways of improveing ship structures, 2nd ed., updated and revised. L .: Shipbuilding (1989) 256.

[6] G.P. Cherepanov, The mechanics of destruction, Regular and chaotic dynamics, M., Izhevsk: Institute of Computer Research (2012) 872.

[7] G.V. Matokhin, K.P. Gorbachev, Fundamentals of calculation methods of linear fracture mechanics: monograph. Vladivostok: Far Eastern State Technical University (2008) 304.

[8] K. Molokov, Evaluation of the fatigue limit of welded joints, taking into account the total plastic deformation of the material in the state of plane stress, Far Eastern Federal University school of engineering bulletin No. 1(38), (2019) 19-26.

[9] V.M. Tutnov, V.M. Dorovsky, A.A. Elesin, Amorphization of crystalline materials in the zone in front of the top of a developing crack, Synergetics and fatigue failure: Collection of scientific works. M .: Nauka (1989) 45-56.

[10] A.V. Fayvisovich, I.G. Birch, Kinetics of the macrocrack geometry, Operation of maritime transport No. 1(90) (2019) 76-82.

DOI: 10.34046/aumsuomt90-12

[11] S.N. Fedotov, Quasi-fragile destruction as destruction of a hierarchy structure, Physical mesomechanics. T. 18, No. 6 (2015) 24-31.

[12] V.F. Terentyev, S.A. Korableva, Fatigue of metals, M .: Nauka (2015) 479.

[13] V.S. Ivanova, Synergetics and fractals. Universality of the mechanical behavior of materials, Ufa: USOTU (1998) 363.

[14] V.S. Ivanova, V.F. Terentyev, The nature of metal fatigue, M.: Metallurgy (1975) 454.

[15] V.A. Kroha, Hardening of metals during cold plastic deformation, Reference book, M.: Mechanical Engineering (1980) 157.

[16] S.S. Sergisen, R.M. Shneidorovich, N.A. Makhutov and others, Deformation fields under low-cycle loading, M .: Nauka (1979) 277.

[17] S.A. Kurkin, Strength of welded thin-walled vessels working under pressure, M.: Mechanical Engineering (1976) 184.

[18] Fundamentals of plastic deformation of nanostructured materials, Eds. A.M. Glaser. M .: Physmatlit (2016) 30.

[19] A.N. Balakhnin, The structure formation and properties of hardened structural low-carbon steels during cold radial forging and subsequent thermal exposure: diss ... candidate of technical sciences: 05.16.09. Perm: IIEPU (2015) 158.

[20] A.N. Smirnov, V.V. Muravyov, N.V. Ababkov, Destruction and diagnostics of metals: Monograph, Moscow, Kemerovo: Innovative Engineering (2016) 479.

[21] S.V. Petinov, Fundamentals of engineering calculations of the fatigue of ship structures, L .: Shipbuilding (1990) 224.