ZHANG Xiaoguang,HAO Xinrui,HAN Shaonian. Analysis of disc spring stiffness degradation induced by fatigue damage[J]. Journal of Mechanical Strength,2025,47(7):49-55.
ZHANG Xiaoguang,HAO Xinrui,HAN Shaonian. Analysis of disc spring stiffness degradation induced by fatigue damage[J]. Journal of Mechanical Strength,2025,47(7):49-55. DOI: 10.16579/j.issn.1001.9669.2025.07.006.
ANALYSIS OF DISC SPRING STIFFNESS DEGRADATION INDUCED BY FATIGUE DAMAGE
The disc spring will bear the cyclic displacement load during using
resulting in the fatigue damage and the stiffness degradation of the disc spring
which causes irreversible influence on the compensation function when accumulated sufficiently to cause fracture. Therefore
the disc spring material which occurred internal fatigue and structural stiffness degradation was studied under the cyclic load. By considering characteristics of the geometric nonlinearity and the action of the cyclic load
based on the traditional stiffness degradation model
a stiffness degradation model fitting for disc springs was established.The force change of the structural system
the law of stiffness degradation of the disc spring
and the stiffness degradation model were analyzed and verified with the finite element software. The model was modified based on the test data to obtain the model that can be used to calculate the degradation of the disc spring stiffness. This model can predict the deformation of disc springs’ structure in service
and determine the fatigue damage and performance degradation degree
which can provide some basis and reference for the application of disc springs.
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