摘要
基于 304不锈钢和 1Cr18Ni9Ti不锈钢单轴常温与高温应力循环棘轮实验,提出了棘轮应力和棘轮门槛值的概念,发展了一套基于棘轮应力一元参量的、描述高温棘轮循环饱和材料的单轴棘轮本构行为和常温演化行为的方法体系,新体系降低了传统二元应力控制棘轮变形认识带来的难度.由于新体系方程结构简洁,建模方法简便,描述实验结果精度高,故适合工程应用.
Based on a series of uniaxial ratchetting tests carried out for 304 and 1Cr(18)Ni(9)Ti stainless steels under cyclic stressing at room temperature and elevated temperature, the concepts of ratchetting stress and ratchetting stress threshold were presented and a set of methodological system was developed which can be used not only to model evoluted law of ratchetting strain of the materials under uniaxial stress at room temperature but also to simulate saturated ratchetting constitutive behavior of the materials at elevated temperatures. The presented system can overcome difficult problems to describe ratchetting deformation from traditional dualistic stress control. The ratchetting constitutive model and ratchetting evoluted model given in this paper have better precision to regress experimental data and are accessible to engineering application due to better concision and easy establishment in equation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第9期966-973,共8页
Acta Metallurgica Sinica
基金
国家自然科学基金 19772041
核燃料及材料国防科技重点实验室开放基金51481070101QT2201资助项目
关键词
棘轮
塑性
不锈钢
模型
本构
ratchetting
plasticity
stainless steel
model
constitution
