Constitutive model depending upon temperature and strain rate of carbon constructional quality steels
The basic factors relating to the theological stress in the constitutive equations were introduced. Carbon constructional quality steels were regarded as a kind of elastic-viscoplastic materials under high temperature and the elastic-viscoplastic constitutive models were summarized. A series of tension experiments under the same temperature and different strain rates, and the same strain rate and different temperatures were done on 20 steel, 35 steel and 45 steel. 52 groups of theological stress-strain curves were obtained. The experimental results were analyzed theoretically. The theological stress constitutive models of carbon steels were built combining the strong points of the Perzyna model and Johnson-Cook model. Comparing the calculation results conducted from the model with the experiment results, the results proves that the model can reflect the temperature effect and strain rate effect of carbon constructional quality steels better.
theological stress strain rate effect teperature effect constitutive model
YANG Liu(杨柳) LUO Ying-she(罗迎社)
School of Landscape Architecture, Zhejiang Forestry University, Hangzhou 311300, China Institute of Rheological Mechanics and Material Engineering,Central South University of Forestry and
国际会议
长沙
英文
43-46
2008-09-28（万方平台首次上网日期，不代表论文的发表时间）