%0 Journal Article
%T EXPERIMENTAL STUDY ON UNIAXIAL CYCLIC PLASTIC BEHAVIOR OF 304 STAINLESS STEEL AT ROOM AND HIGH TEMPERATURE<br>304不锈钢室温和高温单轴循环塑性的实验研究
%A Kang Guozheng
%A Gao Qing
%A Yang Xianjie
%A Sun Yafang
%A <br>康国政
%A 高庆
%A 杨显杰
%A 孙亚芳
%J 力学学报
%D 2001
%I 
%X Many structural parts are often subjected to complex cyclic loading and temperature history. The accumulated plastic strain produced in the asymmetrical stress cycling is called ratcheting strain and may result in the initial failure of structure. Some studies have revealed and modeled the ratcheting behavior of sone structure metals. However, the effects of loading and temperature history have not been considered well yet. The interaction between the strain cycling and stress cycling has not been discussed. In order to provide the experimental basis for constitutive modeling, an experimental study is carried out for the cyclic plastic behaviors of 304 stainless steel subjected to uniaxial strain and stress cycling at room and high temperature. The effects of strain amplitude, mean strain, temperature and their histories on the cyclic plastic behaviors are investigated, and the influences of stress amplitude, mean stress and their histories on the ratcheting are also analyzed at room and high temperature. The interaction of strain cycling and stress cycling is discussed. It is shown that either uniaxial strain cyclic property or ratcheting depends not only on the current temperature and loading state, but also on the previous history. At room and high temperature, 304 stainless steel features cyclic hardening initially, and the rate of cyclic hardening increases with the increase of strain amplitude. The material has an apparent memorization for the prior maximum strain amplitude of load history. However, as temperature increases, the memorization for maximum strain amplitude disappears gradually. The effect of temperature history on cyclic plastic behavior gradually decreases with the increase of intermediate temperature. The ratcheting strain and its rate rise with the increases of mean stress and stress amplitude. The prior higher mean stress and stress amplitude cycling restrains the ratcheting behavior of subsequent loWer mean stress and stress amplitude cycling. With the temperature increased, the ratcheting strain and its rate increase greatly. After prior stress cycling, the cyclic hardening or softening rate of material under strain cycling is lore than that without stress cycling, and the memorization of material for maximum strain amplitude declines. The prior strain cycling restrains the ratcheting behavior of subsequent stress cycling.
%K stainless steel
%K cyclic plasticity
%K ratcheting
%K temperature<br>304不锈钢
%K 循环塑性
%K 棘轮行为
%K 温度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=3E3B96E24591676B&yid=14E7EF987E4155E6&vid=27746BCEEE58E9DC&iid=94C357A881DFC066&sid=15F713CDE16A589C&eid=780091CB32840698&journal_id=0459-1879&journal_name=力学学报&referenced_num=2&reference_num=8