An improved fatigue life prediction model based on loading sequence
作者机构：Dalian Jiaotong UniversityDalianChina
出 版 物：《Railway Sciences》 (铁道科学（英文）)
年 卷 期：2022年第1卷第1期
页 面：90-97页
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：the National Natural Science Foundation of China(10802015) the Joint Fund of Natural Science Foundation of Liaoning Province(2015020119) the Liaoning Province Graduate Education and Teaching Reform Research Project(2017) the Liaoning Province Transformation and the Innovation and Entrepreneurship Education Project(2017)
主 题：Loading sequence Corten-Dolan model Fatigue life Accumulated damage Parameter correction Welding material
摘 要：Purpose–In view of the difficulty in determining the key parameters d in the Corten-Dolan model,based on the introduction of small loads,damage degrees and stress states to the Corten-Dolan model and the existing improved model,the sequential effects of the adjacent two-stage load were further ***/methodology/approach–Two improved Corten-Dolan models were established on the basis of modifying the parameter d by two different methods,namely,increasing stress ratio coefficient as well as considering the effects of loading sequence and damage degree as independent influencing factors *** to the test data of the welded joints of common materials(standard 45 steel),alloy materials(standard 16Mn steel)and Q235B steel,the validity and feasibility of the above two improved models for fatigue life prediction were ***–Results show that,compared with the traditional Miner model and the existing Corten-Dolan improved model,the two improved models have higher prediction accuracy in the fatigue life prediction of welding materials whether under two-stage load or multi-stage ***/value–Because the mathematical expressions of the models are relatively simple and need no multi-layer iterative calculation,it is convenient to predict the fatigue life of welded structure in practical engineering.
维普期刊数据库