EFFECT OF LOADING FREQUENCY ON THE STRAIN BEHAVIOR AND DAMAGE ACCUMULATION IN LOW-CYCLE FATIGUE,
Abstract
In this report low cycle fatigue phenomenon is investigated in total strain ranges from 1 to 2 per cent, and frequencies from 0.2 to 100 cpm. Changes in endurance life under varying strain and frequency conditions were determined. During the endurance tests changes in the moment and strain values at the critical minimum section of the specimens were recorded. From the continuous time recordings of these parameters, elastic and plastic time ratios of specimen lives were defined and their dependence on strain and frequency levels found. Change of crack propagation rate with frequency was also studied. Finally a cumulative fatigue hypothesis, incorporating both frequency and strain parameters, was formulated and shown to be valid under varying strain and frequency conditions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1970
- Accession Number
- AD0707634
Entities
People
- D. E. Gucer
- M. Capa
Organizations
- AGARD