Karuskevich O. Residual life estimation for structural aluminium alloys by the evolution of surface deformation relief.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0407U001366

Thesis Registration Form

0407U001366.pdf

Applicant for

Specialization

  • 05.02.09 - Динаміка та міцність машин

27-03-2007

Specialized Academic Board

Д 26.002.01

Publishing and Printing Institute of Igor Sikorsky Kyiv Polytechnic Institute

Essay

The dissertation is devoted to the development of the method for residual life prediction for the aircraft structure components. It is determined, that as a result of cyclical loading the deformation relief on the surface of clad layer is forming and developing. The intensity of the relief points out the level of accumulated fatigue damage. For quantitative description of the relief the parameter can be applied, calculated as a ratio of the surface area with deformation damage features to the surface area without damage features. The process of the damage parameter evolution under fatigue can be described by the regression of exponential type. In the certain range of loading regimes residual life can be estimated in accordance to the value of damage parameter, independently of the stress level. It allows to apply the method in irregular cyclical loading condition.

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