摘要
复合循环疲劳是燃气轮机叶片和压力容器构件广泛存在的一种疲劳破坏形式。本文以不锈钢S310为研究材料,分别进行了低周疲劳实验、超高周疲劳实验、低周-超高周复合循环疲劳实验,并基于疲劳实验结果和损伤累积理论提出了低周-超高周复合循环疲劳寿命预测方法。通过多组数据与多个复合循环疲劳寿命预测模型的对比,发现本文所提模型在复合循环疲劳寿命预测中具有较小的平均误差和分散性。
Combined high and low cycle fatigue(CCF)generally induces the failure of gas turbine blades and pressure vessel components.In this work,Low cycle fatigue(LCF)test,very-high cycle fatigue(VHCF)test and combined low and very-high cycle fatigue test are performed,and the life prediction method of combined low and very-high cycle fatigue test is discussed with stainless steel S310 as the material.Through the comparison and verification of multiple sets of data and multiple models,it is found that the proposed model in most of the composite fatigue life prediction has less average error and lower dispersion.
作者
杨民
李青键
黄志勇
YANG Min;LI Qingjian;HUANG Zhiyong(College of Aeronautics and Astronautics,Sichuan University,Chengdu 610065,Sichuan,China;Key Laboratory of Deep Earth Science and Engineering(Sichuan University),Chengdu 610065,Sichuan,China;Failure Mechanics and Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province(Sichuan University),Chengdu 610021,Sichuan,China)
出处
《实验力学》
CSCD
北大核心
2021年第5期638-646,共9页
Journal of Experimental Mechanics
基金
国家自然科学基金项目(11672196,11872259)。
关键词
低周-超高周复合循环疲劳
不锈钢
寿命模型
combined low and very-high cycle fatigue
stainless steel
life prediction model
