Study on the Resonant Torsion Vibration in Hourglass Specimens under VHCF Loading

The problem of cyclic loading under pure torsion is an important problem for numerous different industrial applications, such as shafts, springs, blades, and others. The loading conditions for aircraft, railway, automobile industries are often corresponding to long fatigue life. The rough estimation...

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Bibliographic Details
Published in:Journal of physics. Conference series 2021-06, Vol.1945 (1), p.12043
Main Authors: Nikitin, I S, Nikitin, A D, Stratula, B A
Format: Article
Language:English
Subjects:
Aircraft
Algorithms
Automotive engines
Blades
Computer simulation
Crack initiation
Criteria
Cyclic loads
Damage assessment
Fatigue failure
Fatigue life
Fracture mechanics
High cycle fatigue
Industrial applications
Mathematical models
Physics
Service life
Springs (elastic)
Torsion tests
Turbines
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Summary:The problem of cyclic loading under pure torsion is an important problem for numerous different industrial applications, such as shafts, springs, blades, and others. The loading conditions for aircraft, railway, automobile industries are often corresponding to long fatigue life. The rough estimation shows that the number of cycles for springs in car engine is exceeds 10 8 cycle while blades for aircraft turbine may undergo more than 10 10 loading cycles. Such, to provide a safety in service life for such elements a multiaxial fatigue failure criterion is needed to predict damage zone location and fatigue life. This paper is aimed to introduce the multi regime approach to predict fatigue damage zone evaluation and number of cycles to crack initiation and total fatigue life. The presented approach is based on damage theory supplemented by multiaxial failure criterion. The proposed model includes the algorithm for automatic determination the fatigue loading range (low-, high- or very-high cycle fatigue) and allows different crack opening modes. To show how to apply the proposed approach and verify the results of calculation the series of numerical simulation on hourglass specimen subjected to VHCF pure torsion is performed. The results of numerical simulation are compared to VHCF torsion tests.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1945/1/012043