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| Residual strength and life prediction of composites based on static strength distribution parameters |
| Received:July 29, 2022 Revised:October 02, 2022 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20220729001 |
| KeyWord:composite material residual strength fatigue life Initial static strength distributed parameter |
| Author | Institution |
| 赵维涛 |
沈阳航空航天大学 航空宇航学院, 沈阳 |
| 朱珒婧 |
沈阳航空航天大学 航空宇航学院, 沈阳 |
| 刘春升 |
沈阳航空航天大学 航空宇航学院, 沈阳 |
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| Abstract: |
| To reveal the relationship of residual strength and fatigue life with initial static strength distribution parameters,calculation models of residual strength and fatigue life based on initial static strength distribution parameters are constructed.The number of layers,ply thickness and ply angle of the composite structure are not involved in the process of model construction,so the models have strong adaptability.The model parameters can be obtained from a static test and a residual strength test,thus the test cost of the proposed method is lower than that of a fatigue test.The residual strength and fatigue life are related to the variation coefficient and distribution parameters of the initial static strength.When the initial static strength obeys the Weibull distribution,the fatigue life also obeys the Weibull distribution,which can provide a reference for fatigue reliability.The example shows that the maximum error of the residual strength calculation result is -1.58% and the fatigue life fits well with the test data. |