Determining permissible stresses in simple cyclic loading
- 18 Downloads
Cyclic loading stress is examined for a limiting-state diagram which characterizes the fatigue resistance, the permissible stresses, the cyclic cracking resistance, and the limiting fatigue crack size. It has been found for 09G2 steel that the limiting crack size is dependent on the stress cycle asymmetry if the permissible stresses are determined for a given strength margin coefficient. One can construct a permissible-stress diagram for a given crack size. In that case, the strength margin coefficient is dependent on the stress cycle asymmetry, which enables one to make better use of the material.
KeywordsStress Intensity Factor Stress Intensity Factor Fatigue Limit Crack Size Cycle Stress
Unable to display preview. Download preview PDF.
- 1.S. V. Serensen, V. P. Kogaev, and R. M. Shneiderovich, Handbook on Machine-Component Carrying Capacity and Strength Calculations [in Russian], Mashinostroenie, Moscow (1975), 488 pp.Google Scholar
- 2.Methodological Instructions: Strength Calculations and Tests. Methods for Mechanical Tests on Metals. Definition of Cracking Resistance Characteristics (Fracture Toughness) in Cyclic Loading [in Russian], RD 50-345-82 Izd. Standartov, Moscow (1983).Google Scholar
- 3.V. I. Letunov, V. A. Vainshtok, and B. S. Shul'ginov, “Comparative analysis of stress intensity factor determination for semielliptical surface cracks under bending conditions, Probl. Prochn., No. 4, 17–21 (1984).Google Scholar
- 4.V. I. Trufyakov, Fatigue in Welded Joints [in Russian], Naukova Dumka, Kiev (1973).Google Scholar