S30408奥氏体不锈钢的应变疲劳与寿命预测模型.pdfVIP

HotWorkingTechnology2022,Vol.51,No.2

S30408奥氏体不锈钢的应变疲劳与寿命预测模型

张健％代巧^周金宇2,何爵亨\陈宇1

(1.江苏理工学院机械工程学院，江苏常州213000;2.金陵科技学院机电工程学院，江苏南京211169)

摘要：对S3040奥氏体不锈钢进行应变疲劳试验研究，通过循环应力-应变响应特征、应力-应变滞回曲线和疲

劳寿命研究其疲劳性能，并获得应变疲劳参数。为了构建其疲劳寿命预测模型，对比了Manson-Coffin方程、三参数幂

函数、三参数幂函数能量法和基于塑性应变能的寿命方程的适用性。结果表明：4种疲劳寿命预测模型能有效表征应变

疲劳寿命与应变幅的关系，其中三参数幂函数能量法和基于塑性应变能的寿命方程具有更好的预测精度。

关键词：奥氏体不锈钢；应变疲劳；滞回曲线；寿命预测

DOI:10.14158/j.cnki.1001-3814.

中图分类号：TG405文献标识码：A文章编号：1001-3814(2022)02-0070-06

StrainFatigueandLifePredictionModelsforS30408AusteniticStainlessSteel

ZHANGJian1,DAIQiao1,ZHOUJinyu2,HEJueheng1,CHENGYu1

(1.SchoolofMechanicalEngineering,JiangsuUniversityofTechnology,Changzhou213000,China;2.SchoolofMechanical

andElectricalEngineering,JinlingInstituteofTechnology,Nanjing211169,China)

AbstractThe：strainfatigueexperimentsofS30408austeniticstainlesssteelwerecarriedout,andthefatigueproperty

wasstudiedbycyclicstress-strainresponsecharacteristics,stress-strainhysteresiscurveandfatiguelife,meanwhilethestrain

fatigueparameterswereobtained.InordertoestablishthefatiguelifepredictionmodelofS30408austeniticstainlesssteel,the

applicabilityoftheManson-Coffinequation,threeparameterspowerfunction,threeparametersstrainenergyfunctionandthe

lifepredictionmodelbasedonplasticenergywerecompared.Theresultsshowthatallthefourfatiguelifepredictionmodel

caneffectivelycharacterizetherelationshipbetweenthestrainfatiguelifeandthestrainamplitude.Inaddition,three

parameterspowerfunctionenergymethodandthelifepredictionmodelbasedon