爆炸与冲击2018，Vol.38Issue(2)：266-270,5.DOI:10.11883/bzycj-2016-0252
一种新形式的钢纤维混凝土冲击动态本构关系及材料参数的确定
A new impact dynamic constitutive relation of steel fiber reinforced concrete and the determination of material parameters
摘要
Abstract
In the present study we carried out the dynamic compression experiments of steel fiber reinforced concrete with the fiber volume ratios of 0％,0.75 ％ and 1.5 ％ using the φ75 mm large-diameter split Hopkinson pressure bar experimental system to obtain the stress-strain curves at different strain rates.The experimental results show that with the increase of the fiber content and the strain rate,both the peak strain and the peak stress of the steel reinforced concrete rise higher,and the strain softening is observed after the peak stress.Based on the assumption that there are two independent factors controlling the dynamic behavior of the steel fiber reinforced concrete,one related to the strain to indicate the nonlinear stress-strain behavior and the other related to the strain rate to express the strain rate effect,a new type of the dynamic nonlinear viscoplastic constitutive equation was proposed.The details concerning how to get the equation and the material parameters were discussed thoroughly.The experiment curves were fitted using the least squares optimization numerical simulations.Good agreement between the numerical simulations and the experiment curves was achieved,thereby concluding that the new constitutive relation proposed is perfect for steel fiber reinforced concrete.关键词
钢纤维混凝土/SHPB/应变率效应/动态本构关系Key words
steel fiber reinforced concrete (SFRC)/SHPB/strain rate effect/dynamic constitutive relation分类
数理科学引用本文复制引用
叶中豹,李永池,赵凯,黄瑞源,孙晓旺,张永亮..一种新形式的钢纤维混凝土冲击动态本构关系及材料参数的确定[J].爆炸与冲击,2018,38(2):266-270,5.基金项目
国家自然科学基金项目(11402266,11202206) （11402266,11202206）
安徽高等学校省级自然科学重点研究项目(KJ2016A315,KJ2016A316,KJ2017A615) （KJ2016A315,KJ2016A316,KJ2017A615）
北京理工大学爆炸科学与技术国家重点实验室开放课题(KHJ13-9M) （KHJ13-9M）
