混凝土类材料在SHPB实验中惯性效应的数值模拟研究（英文）  

Numerical Study of Inertial Effects of Concrete-Like Materials in Split Hopkinson Pressure Bar Tests

作　　者：尚兵[1] 王彤彤[2] 

机构地区：[1]广州航海学院航务工程学院,广东广州510725 [2]广州航海学院基础部,广东广州510725

出　　处：《高压物理学报》2017年第2期114-124,共11页Chinese Journal of High Pressure Physics

基　　金：Innovative School Foundation of Guangzhou Maritime University

摘　　要：分离式霍普金森压杆(SHPB)被广泛应用于测试混凝土类材料在高应变率(10~103 s-1)下的动态增强效应。为更好地理解这类问题,进行了数值模拟研究,采用J2本构模型研究SHPB试验中的纵向惯性效应,线性Drucker-Prager模型研究SHPB试验中的径向惯性效应。研究结果表明:纵向惯性效应不影响动态增强因子;径向惯性效应对动态增强因子有影响,但不是混凝土类材料在高应变率下动态增强因子提高的最主要原因。The split Hopkinson pressure bar（SHPB）technique has been widely used to measure the dynamic strength enhancement of concrete-like materials at high strain rates ranging from 10 to 10^3 s^-1.In this research,computational simulation models were employed to obtain a better understanding of this technique.The constitutive models of J2 and the linear Drucker-Prager were employed to study the axial and lateral inertial effects on SHPB test.The results show that the axial inertia does not affect the DIF（dynamic increase factor）and the lateral inertia confinement is not the most important factor that causes an apparent increase of the DIF for concrete and concrete-like materials at high strain rates.

关 键 词：有限元法 分离式霍普金森压杆 数据处理 惯性效应 动态增强因子 

分 类 号：O347.4[理学—固体力学]