Affiliation:
1. Lanzhou University of Technology
Abstract
The fatigue life of notched torus under random scan vibration is discussed in this paper. The stress function and stress field intensity of the materials under composted cyclic stress are analyzed. The experiments of vibration of the notched torus under random load are made in the digital vibration equipment. The fatigue life of notched torus is predicted by use the local stress-strain field method and three parameters formula. The elasto-plastic properties of the material are described by Von Mises yield criterion and stress-strain of uniaxial cyclic loading. The field of local fatigue damage of notched torus under random vibration is determined by using the method of local stress-strain field intensity, and the cycle stress-strain response near the tip of notch is obtained. The revised factor of fatigue life of LY12-CZ material is determined, the relationship between high-frequency cycle of stress and fatigue life is set up by use three parameters formula, and the fatigue life of the notched torus is obtained.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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