Abstract
Residual strength is one of the important properties of materials and is the basis for material fatigue life prediction. In this article, the residual strength of 18CrNiMo7-6, a commonly used mater...
Highlights
Fatigue damage is a process in which the material is degraded under cyclic loading
Where R(n) is the residual strength of the component after a period of service, smax is the maximum value of the alternating load, and R is the stress ratio of the load
W Lu and L Xie[15] described the process of material static strength attenuation degradation of components during fatigue process under equal amplitude stress dsR(n) dn where sR(n) is the residual strength of the material; S is the cyclic stress level; n is the number of cyclic loads; and p and q are material constants and are related to external loading frequency, humidity, temperature, and other factors; sR(n) meets the boundary conditions sR(0) = s, sR(N ) = S
Summary
Fatigue damage is a process in which the material is degraded under cyclic loading. The damage variable depends on the magnitude of stress or strain. The relationship between residual strength, stress level, and load cycle number is obtained, and the nonlinear decay attenuation law and mathematical model are established.
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