Accession Number : AD0708327

Title :   SIMULATION OF RANDOM LOAD FATIGUE IN LABORATORY TESTING,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Ravishankar,T. J.

Report Date : MAR 1970

Pagination or Media Count : 121

Abstract : The methods used in laboratory simulation of random service load conditions, that lead in practice to fatigue failure e.g. aircraft structures, are reviewed. First, the inter-relation of the atmospheric turbulence with the resulting loads on the aircraft are discussed. Then follows an analysis and interpretation of service load histories and a review and comparison of the methods in use for simulating service load spectra of arbitrary and random load sequences. Both random loading, using discrete load levels or analogous random process testing, are discussed. Full scale testing is also reviewed. In appendices, stationary random processes and fewer spectral density functions an evaluation of probability distributions of RMS gust velocities and some damage theories are presented. (Author)

Descriptors :   (*AIRFRAMES, FATIGUE(MECHANICS)), SIMULATION, AERODYNAMIC LOADING, GUST LOADS, TURBULENCE, COUNTING METHODS, POWER SPECTRA, PROBABILITY DENSITY FUNCTIONS, CRACKS, NUMERICAL ANALYSIS

Subject Categories : Aircraft
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE