Determinations of HJC constitutive model parameters for normal strength concrete

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (18) : 9-16.

REN Gen-mao1, WU Hao1, FANG Qin1, ZHOU Jian-wei2, GONG Zi-ming1

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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

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REN Gen-mao1, WU Hao1, FANG Qin1, ZHOU Jian-wei2, GONG Zi-ming1. Determinations of HJC constitutive model parameters for normal strength concrete[J]. Journal of Vibration and Shock, 2016, 35(18): 9-16

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