空军工程大学学报2025，Vol.26Issue(4)：11-18,8.DOI:10.3969/j.issn.2097-1915.2025.04.002
基于增量裂纹扩展与开裂能密度的橡胶结构疲劳寿命预测
A Fatigue Life Prediction Method of Rubber Structures Based on Incremental Crack Propagation and Cracking Energy Density
摘要
Abstract
At present,existing crack initiation methods and crack propagation methods which can be used to predict rubber fatigue life are not enough,a new method for rubber multi-axis fatigue life prediction based on incremental crack propagation and cracking energy density is proposed.First,a mathematical model of cracking energy density under the finite strain assumption is introduced.Second,assuming that the cracking energy density changes with crack propagation,a functional relationship between the energy release rate and the renewal cracking energy density is established.Finally,a multi-axis fatigue life predic-tion model of rubber structure based on incremental crack propagation is established.This model can sim-ultaneously achieve prediction of fatigue life and explicit expansion of cracks.The effectiveness of the pro-posed method is verified by the numerical examples.The results indicate that the fatigue life prediction model based on incremental crack propagation is good in prediction accuracy in consideration of high-strain conditions,and the prediction accuracy increases by about twice as compared with the classical crack ener-gy density life prediction model.关键词
橡胶结构/开裂能密度/疲劳寿命/增量裂纹扩展Key words
rubber structure/cracking energy density/fatigue life/incremental crack propagation分类
航空航天引用本文复制引用
黄志强,陈彦甫,杨自豪..基于增量裂纹扩展与开裂能密度的橡胶结构疲劳寿命预测[J].空军工程大学学报,2025,26(4):11-18,8.基金项目
中国科学院战略性先导科技专项子课题(XDC06030101) （XDC06030101）
