Accession Number : AD0675188

Title :   STUDIES OF FATIGUE UNDER SINUSOIDAL AND RANDOM LOADING CONDITIONS.

Descriptive Note : Technical rept. Jun 65-May 67,

Corporate Author : SOUTHAMPTON UNIV (ENGLAND) INST OF SOUND AND VIBRATION RESEARCH

Personal Author(s) : Williams,T. R. G. ; Tayler,C. J.

Report Date : JUN 1968

Pagination or Media Count : 42

Abstract : A program involving age hardening aluminum alloy L73 was undertaken to evaluate the response of this material to sinusoidal and random loading. The random stress pattern applied was derived from a resonance system, and the distribution of stresses conformed to a Rayleigh distribution of peaks at a narrow band frequency around 90 cycles per second. A discontinuity was observed in the sinusoidal S/N curves of the material associated with a change in fracture characteristics. The random loading results showed that the discontinuity was an important factor in the formulation of fatigue prediction theory. The results of testing mild steel under sinusoidal conditions are also presented. (Author)

Descriptors :   (*ALUMINUM ALLOYS, FATIGUE(MECHANICS)), AGE HARDENING, LOADS(FORCES), STEEL, STRESSES

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE