沈阳航空航天大学学报2024，Vol.41Issue(3)：1-6,6.DOI:10.3969/j.issn.2095-1248.2024.03.001
基于改进剩余强度模型的复合材料疲劳寿命预测
Fatigue life prediction of composite materials based on improved residual strength model
摘要
Abstract
The strength degradation law of composite materials is very important for studying the struc-tural fatigue life.However,some parameters involved in existing residual strength models are con-firmed using residual strength test data,so the cost of model construction is high.By exploring the rela-tionship between fatigue life and residual strength of composite materials,taking the cumulative distri-bution function of fatigue life as the starting point,a damage degree with clear physical meaning was constructed,and then an improved residual strength model was proposed.The improved residual strength model didn't need residual strength test data but only initial static strength and fatigue life da-ta.A fatigue life prediction model called S-N-φ model was constructed based on the improved residual strength model,which can consider the influence of initial static strength on fatigue life.The results show that the prediction accuracy of the improved residual strength model is satisfactory,and the S-N-φ model has better prediction accuracy than the classical S-N curve model.关键词
复合材料/剩余强度/疲劳寿命/S-N曲线/损伤度Key words
composite materials/residual strength/fatigue life/S-N curve/damage degree分类
航空航天引用本文复制引用
赵维涛,孟庆辉..基于改进剩余强度模型的复合材料疲劳寿命预测[J].沈阳航空航天大学学报,2024,41(3):1-6,6.基金项目
国家自然科学基金(项目编号:12272240) （项目编号:12272240）
