RESEARCH ON TECHNIQUES OF ESTABLISHING RANDOM TYPE FATIGUE CURVES FOR BROAD BAND SONIC LOADING
Abstract
Methods for establishing fatigue curves for broadband random loading were investigated. Specifically, the goal was to develop a rational method for estimating fatigue life on the basis of the results of carefully designed and conducted random load fatigue experiments on simple specimens. A previously developed concept for estimating the effects of stress interaction on fatigue life under programmed variable amplitude cyclic loading was extended on the basis of the random load fatigue life tests and the experimental statistical data reported herein. The approach was to absorb the trends indicated by the results of this experimental program, together with the results of other investigations, into an expression involving the constant cycle S-N relationship, the root-mean-square stress, and other simple parameters which could be derived from the random load stress power spectrum and from the appropriate stress frequency distribution. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1962
- Accession Number
- AD0290799
Entities
People
- J.r. Fuller
Organizations
- Boeing