计算力学学报2024，Vol.41Issue(4)：696-701,6.DOI:10.7511/jslx20230208001
考虑静强度的复合材料疲劳寿命预测及概率特性分析
Prediction and probability characteristic analysis of fatigue life for composite materials considering static strength
摘要
Abstract
In order to consider the influence of initial static strength on fatigue life,a fatigue life prediction model of composite materials is established considering both initial static strength and stress based on the classical residual strength theory.The proposed life prediction model can represent the internal relationships between fatigue life and initial static strength and between fatigue life and stress,and can cover the classical S-N curve.The relationship between fatigue life and initial static strength is nonlinear,and the relationship between fatigue life and stress is highly nonlinear.The probability distributions of fatigue life can be obtained by using MCS according to the probability distribution of the initial static strength and stress.Numerical examples show that the probabilistic characteristics of the initial static strength and stress have an effect on the residual strength and the probabilistic characteristics of fatigue life,and the stress has a more significant effect on the probabilistic characteristics of fatigue life than the initial static strength.关键词
疲劳寿命/复合材料/静强度/概率特性/S-N曲线Key words
fatigue life/composite material/static strength/probabilistic characteristics/S-N curve分类
数理科学引用本文复制引用
赵维涛,刘春升,朱珒婧..考虑静强度的复合材料疲劳寿命预测及概率特性分析[J].计算力学学报,2024,41(4):696-701,6.基金项目
国家自然科学基金(12272240)资助项目. （12272240）
