Effect of Notch, Corrosion and Stress Ratio on the Constant and Variable Amplitude Fatigue Behavior of two Materials

810125

02/01/1981

Event
SAE International Congress and Exposition
Authors Abstract
Content
The fatigue response of 7075-T73 aluminum alloy (cyclically hardening) and SAE 1045 (mod.) steel (cyclically softening) was investigated in air and corrosive environments under constant amplitude and variable amplitude fatigue loadings. Variable amplitude tests showed that crack propagation life was important in notched specimens in air as well as in corrosive environment. In corrosive environment pits were found to act as initiation sites in the steel specimens.
The effect of stress ratio, notches and environment on the fatigue life was treated through an effective stress, . Here, ‘m’ is a material constant that depends on the environment. This relation was also examined to predict fatigue lives under loading with variable stress ratio and applied to fatigue results.
Meta TagsDetails
DOI
https://doi.org/10.4271/810125
Pages
16
Citation
Bhowal, P., "Effect of Notch, Corrosion and Stress Ratio on the Constant and Variable Amplitude Fatigue Behavior of two Materials," SAE Technical Paper 810125, 1981, https://doi.org/10.4271/810125.
Additional Details
Publisher
Published
Feb 1, 1981
Product Code
810125
Content Type
Technical Paper
Language
English