摘要
为了研究国产奥氏体不锈钢S30408的本构关系,对不同厚度的不锈钢试件进行单向拉伸试验。基于试件拉伸的试验曲线,得到不锈钢的名义应力-应变曲线及相关参数,之后将试验结果与各本构模型进行对比。结果表明:不锈钢材料具有明显的非线性;R-O模型较试验值结果偏大,Rasmussen模型、G-N模型和Quach模型与试验值误差较小。最后,采用各本构模型确定的材料的真实应力-应变建立有限元模型进行分析,发现分析结果与试验值吻合较好,建议的本构模型可用于后续关于不锈钢S30408构件及连接的相关研究。
The constitutive relation of domestic austenitic stainless steel S30408 was studied by unidirectional tensile test of stainless steel specimens with different thicknesses. Based on the tensile test curve,the nominal stress-strain curve and parameters for the constitutive relation. Data for specimens were obtained,the test results were compared with several constitutive models. The results showed that stainless steel exhibited significant nonlinearity,and the values of R-O equations was larger than the experimental results,the experimental values were in good agreement with the models like Rasmussen model,G-N model and Quach model with small error. Finally,the finite element models were established by the actual stress-strain depened on various constitutive models,the analytical results of these models and experimental results agreed very well. The determinated constitutive model could be applied to the releated research of stainless steel S30408.
出处
《钢结构》
北大核心
2016年第5期37-40,51,共5页
Steel Construction
基金
吉林省教育厅"十二五"科学技术研究项目(2015-276)
关键词
不锈钢
本构关系
有限元模型
stainless steel
constitutive relation
finite elements model
