ASSESSMENT OF STRENGTH CHARACTERISTICS FOR STRUCTURAL MATERIALS AT STATISTIC PREDICTION OF APPEARANCE OF FATIGUE CRACKS IN STRUCTURAL MEMBERS OF AIRCRAFT

Abstract

There the study objects are the statistic characteristics of appearance of fitigue macrocracks in the load-bearing members of aircraft structures in the field of multi-cycle fatigue. The purposes are the develop and to realize by practice the procedure of design-experimental assessment for the distribution characteristics of strength of material microvolumes for the statistic prediction of appearance of fatigue cracks in the structural members on the basis of trivariate non-linear simulator of weak link theory. The choice algorithm of agreing probabilities for the obtaining of refined assessments of distribution characteristics of strength of structural material microvolumes has been developed. The procedure and the software of design assessment according to the results of fatigue tests of specimens of distribution characteristics of strength of material microvolumes, which are necessary for the prediction of appearance of fatigue cracks in the structural members with the use of trivariate non-linear simulator of weak member theory, have been developed. The procedure and the software have been introduced in the Design Office of Machine-Building (Kolomna) and in the Central Specialized Design Office (Samara). The application fields are the enterprises, which execute the designing and the production of aerospace hardware as well as the motor-car building, the shipbuilding and the production of power-plantsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio