Experimental-theoretical study of low-cycle fatigue fracture in the case of a complex loading history
Abstract
Results of an experimental study of low-cycle fatigue using tests at cyclic strains of constant amplitude, with deformation overloads or staggered low-amplitude cycles, are reported. It is shown that the use of linear fatigue damage summation in such problems may systematically overpredict the fatigue life in comparison with the experimental values. The fatigue life is calculated using a kinetic damage accumulation criterion. The resulting new law of damage summation is shown to describe experimental data reasonably well.
- Publication:
-
Problems of the Strength and Fatigue of the Elements of Aircraft Structures
- Pub Date:
- 1990
- Bibcode:
- 1990psfe.rept..102M
- Keywords:
-
- Combined Stress;
- Cumulative Damage;
- Fatigue Life;
- Load Distribution (Forces);
- Stress Cycles;
- Structural Members;
- Cyclic Loads;
- Linear Equations;
- Structural Mechanics