普通混凝土HJC本构模型参数确定

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摘要 Holmquist-Johnson-Cook（HJC）本构模型广泛应用于冲击爆炸作用下混凝土类材料的动态响应分析中。基于已有普通混凝土（单轴抗压强度≤60MPa）的准静态单轴压缩实验、三轴围压实验、一维SHPB实验和一维平面应变Hugoniot冲击压缩实验数据，确定了一组适用于不同强度普通混凝土材料HJC本构模型的强度参数、率效应参数和状态方程参数取值。基于上述确定参数值通过LS-DYNA有限元分析软件，对十五组普通混凝土（单轴抗压强度13.5~58.4MPa）靶体的刚性弹体侵彻贯穿实验进行了数值模拟。通过与实验中弹体侵彻深度，贯穿残余速度以及弹体过载和靶内径向应力时程结果对比，验证了本文所确定模型参数的准确性。

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	任根茂1
	吴昊1
	方秦1
	周建伟2
	龚自明1

关键词 ：普通混凝土, 本构模型, 数值模拟, 侵彻, 贯穿

Abstract：Holmquist-Johnson-Cook (HJC) constitutive model has been widely used in analyzing the dynamic responses of concrete-like materials under shock and impact. Based on the available data from the existing quasi-static uniaxial compression test, the tri-axial compression test, the SHPB experiment as well as Hugoniot experiment, the strength parameters, the strain rate parameters, and the equation of state parameters of the HJC model for normal strength concrete (NSC, uniaxial compressive strength≤60MPa) were determined. Based on the above determined parameters, by using the finite element program LS-DYNA, total fifteen sets of projectile penetration and perforation tests on NSC (uniaxial compressive strength 13.5~58.4MPa) targets were numerically simulated, respectively. By comparisons with the experimental data of penetration depths, the residual velocities of the perforated projectiles, the deceleration-time and in-target radial stress-time histories, the verifications of the proposed parameters were validated.

Key words： normal strength concrete constitutive model numerical simulation penetration perforation

收稿日期: 2015-07-20 出版日期: 2016-09-15

引用本文:

任根茂1，吴昊1，方秦1，周建伟2，龚自明1. 普通混凝土HJC本构模型参数确定[J]. 振动与冲击, 2016, 35(18): 9-16.
REN Gen-mao1, WU Hao1, FANG Qin1, ZHOU Jian-wei2, GONG Zi-ming1. Determinations of HJC constitutive model parameters for normal strength concrete. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(18): 9-16.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I18/9

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