Lishchyns'ka M. Residual longevity evaluation of inhomogeneous materials with variable toughness characteristics

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0400U000644

Thesis Registration Form

0400U000644.pdf

Applicant for

Specialization

  • 01.02.04 - Механіка деформівного твердого тіла

23-02-2000

Specialized Academic Board

Д 35.226.02

Karpenko Physico-Mechanical Institute of NASU

Essay

The calculated model of fatigue cracks propagation in non-isotropic on mechanical properties materials with taking into account of prehistory of plastic deformation is offered. The influence of cyclic loading prehistory of a material on a crack trajectory kinetics is investigated. The method of equivalence of equiltangential cracks for the definition of stress intensity factors in plates near curvilinear cracks is developed. The influence of taking into account of a strengthening characteristics heterogeneity of a material in the field of welded junction on calculated evaluations of residual longevity of constructions is investigated. The comparison of calculated estimations of residual longevity of welded junctions with experimental results is carried out.

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