Laws of fatigue fracture of metallic materials
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A kinetic criterion of fatigue fracture of metallic materials is suggested and used for showing the existence of a single fatigue curve for cases of soft (with specified load amplitude) and rigid (with specified strain range in a cycle) loading for the stages of crack formation and propagation. The criterion makes it possible to compute the endurance of elements of a structure and levels of accumulated damage in terms of the ultimate accumulated damage for any loading stage including programmed loading (combination of soft and rigid loading, double-frequency and random loading, and loading with temporary holds under load). The criterion is substantiated by numerous experimental data for various metallic structural materials.
KeywordsFatigue Plastic Strain Fatigue Fracture Crack Nucleation Ultimate Strain
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- 1.A. N. Romanov, Fracture Due to Low-Cycle Loading [in Russian], Nauka, Moscow (1988).Google Scholar
- 2.V. V. Novozhilov and O. G. Rybakina, “Prospects of development of phenomenological approach to the problem of fracture of solids,” in: Mater. Rep. 3rd Meeting on Mechanical Problems of Fatigue [in Russian], IMASh, Moscow (1966), pp. 71–78.Google Scholar
- 3.O. G. Rybakina, “Phenomenological description of low-cycle fatigue under conditions of stress concentration,” in: Problems of Deformable Solids [in Russian], Sudostroenie, Moscow (1970), pp. 30–33.Google Scholar
- 4.A. N. Romanov, “Energy criteria of fracture. Report 2: Cyclic Baushinger effect and criteria of low-cycle fracture,” Probl. Prochn., No. 1, 11–18 (1974).Google Scholar
- 5.A. N. Romanov, Structure and Strength of Structural Materials [in Russian], Izd. MTsNTI, Moscow (1988).Google Scholar
- 6.A. N. Romanov and N. A. Kostenko, “Choice of material in design according to criteria of cyclic, long-term static, and brittle fracture in the stages of crack nucleation and propagation,” Inzh. Zh., No. 10, 53–56 (1998).Google Scholar
- 7.A. N. Romanov, “Criteria of fatigue fracture with allowance for the work of residual microstresses, ” Priklad. Mekh., 13(2), 69–79 (1977).Google Scholar
- 8.A. N. Romanov, “A single criterion of fatigue fracture of metallic materials,” Dokl. Akad. Nauk, 380(1), 56–59 (2001).Google Scholar
- 9.A. N. Romanov, “Application of the method of microhardness to description of strain nonuniformity under low-cycle loading,” in: Proc. Conf. “Methods and Equipment for On-Line Estimation of the State of Metal,” Moscow, Nov. 26–28, 2002 [in Russian], Izd. MÉI, Moscow (2002), pp. 201–205.Google Scholar