Dubytskyy O. Method for evaluation of strength and residual lifetime of a vehicle spring containing cracks

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0413U000995

Thesis Registration Form

0413U000995.pdf

Applicant for

Specialization

  • 01.02.04 - Механіка деформівного твердого тіла

01-03-2013

Specialized Academic Board

Д 32.075.01

Essay

In this work there suggested the following: a model for the technological cycle of intensive truck operation, a physical descriptive model for calculation of the residual lifetime of a leaf spring with existing surface cracks, and a mathematical model for calculation of the kinetics of surface fatigue crack propagation under cyclic loading, as a major factor that determines lifetime of a leaf spring. All of this together has laid the foundation for the created engineering methodology for assessing the residual life-time of the spring, which leaves contain surface cracks. It enabled more effective diagnostics and exploitation of truck suspension springs preventing their premature spontaneous degradation, as were confirmed by the implementation of the results of dissertation research into production.

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