Multi-axis notched part fatigue life estimation method based on energy criterion

CN119150620AInactive Publication Date: 2024-12-17LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Application Number
CN202411476036.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-22
Publication Date
2024-12-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multi-axis notched part fatigue life estimation method based on an energy criterion, and the method comprises the steps: firstly, giving a calculation method of equivalent strain energy density, and representing an energy distribution condition on a critical surface through a hexa-degree polynomial; determining a critical distance by using the relative energy gradient, giving a weight function based on the energy gradient, and calculating strain energy density on a critical surface; secondly, giving a fatigue life prediction model of the multi-axis notched part by considering the influence of energy gradient, size effect and non-proportional additional strengthening effect; the prediction result of the model provided by the invention is within 2 times of the dispersion zone, and is superior to the prediction result of other models.
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Citation Information

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