|
|
|
| EXPERIMENTS AND NUMERICAL ANALYSIS OF DESTRUCTIVE EFFECTS OF GRANITE TARGET UNDER IMPACT OF PROJECTILE |
| WANG Haibing1，2，SHOU Liefeng2，ZHANG Jianxin2，TIAN Zhou2，OU Zhuocheng1，ZHOU Gang2 |
(1. State Key Laboratory of Explosion Science and Technology，Beijing Institute of Technology，Beijing 100081，China；
2. Northwest Institute of Nuclear Technology，Xi?an，Shaanxi 710024，China) |
|
|
|
|
Abstract The crater depth and crack length of granite targets impacted by different velocity projectiles were studied with experimental and numerical methods. Five experiments were carried out by gas gun. The crater diameter，maximum penetration depth，distribution of cracks on target surface and the other destructive effects were obtained from the experiments at three different impact velocities. The distribution of inner cracks was attained with the help of cutting target normally impacted by the projectile at the velocity of 654 m/s. Nonlinear dynamic software Autodyn was used to simulate the penetration destructive effects of granite target. Johnson- Holmquist shock damage constitutive model(JH–2 model) and tensile crack softening model were coupled together to simulate the compressive and shear destructive effects in high pressure region，and the damage and propagation of radial tensile cracks generated by the principal tensile stress in low pressure region. Instead of traditional elements-deleting methods in FEM，the arithmetic of SPH was used and the parameter of damage was defined to describe the failure of compression and the cracks induced by shear and tensile failure. The simulation results about crater depth and crack length are consistent with the experimental ones. Based on numerical validated model parameters，serious numerical experiments were implemented；and formulae about crater depth and crack length of granite targets under the impact of different velocity projectiles were obtained. The method and the validated material model parameters used in this paper could be referenced by relevant experiments and simulations.
|
|
Received: 25 October 2012
|
|
|
|
| [1] HEUZE F E. An overview of projectile penetration into geological materials，with emphasis on rock[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1990，27(1)：1–14.
[2] FORRESTAL M J，TZOU D Y. A spherical cavity-expansion penetration model for concrete targets[J]. International Journal of Solids and Structures，1997，34(31/32)：4 127–4 146.
[3] BERNARD R S. Empirical analysis of projectile penetration in rock[R]. [S.l.]：[s.n.]，1977.
[4] FORRESTAL M J，ALTMAN B S，CARGILE J D，et al. An empirical equation for penetration depth of ogive-nose projectiles into concrete targets[J]. International Journal of Impact Engineering，1994，15(4)：395–405.
[5] YOUNG C W. Penetration equations[R]. [S.l.]：[s.n.]，1997.
[6] 张德志，林俊德，唐润棣，等. 高强度岩石侵彻经验公式[J]. 兵工学报，2006，27(1)：15–18.(ZHANG Dezhi，LIN Junde，TANG Runli， et al. An empirical equation for penetration depth of projectiles into high-strength rock targets[J]. Acta Armamentarii，2006，27(1)：15–18.(in Chinese))
[7] 王明洋，谭可可，吴华杰，等. 钻地弹侵彻岩石深度计算新原理与方法[J]. 岩石力学与工程学报，2009，28(9)：1 863–1 869.(WANG Mingyang，TAN Keke，WU Huajie，et al. New method of calculation of projectile penetration into rock[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(9)：1 863–1 869.(in Chinese))
[8] 胡柳青，李夕兵，龚声武. 冲击载荷作用下裂纹动态响应的数值模拟[J]. 爆炸与冲击，2006，26(3)：214–221.(HU Liuqing，LI Xibing， GONG Shengwu. Simulation on dynamic response of crack subjected to impact loading[J]. Explosion and Shock Waves，2006，26(3)：214–221.(in Chinese))
[9] CARGILE J D. Development of a constitutive model for numerical simulation of projectile penetration into brittle geomaterials[R]. [S. l.]：[s. n.]，1997.
[10] AHRENS T J，RUBIN A M. Impact-induced tensional failure in rock[J]. Journal of Geophysical Research，1993，98(E1)：1 185– 1 203.
[11] 王海兵，张海波，田 宙，等. 花岗岩介质中爆炸回填堵塞的数值模拟[J]. 岩石力学与工程学报，2005，24(增1)：5 013–5 019. (WANG Haibing，ZHANG Haibo，TIAN Zhou，et al. Numerical simulation of high-explosive explosion with a backfilled tunnel in granite[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(Supp.1)：5 013–5 019.(in Chinese))
[12] JOHNSON G R，HOLMQUIST T J. An improved computational constitutive model for brittle materials[C]// Proceedings of the AIP Conference. [S.l.]：[s.n.]，1994：981–984.
[13] RICHARD A. HAYHURST C C J. Numerical modelling of the compressive and tensile response of brittle materials under high pressure dynamic loading[R]. [S.l.]：[s.n.]，1999.
[14] CLEGG R A，HAYHURST C J，TOBERTSON I. Development and application of Rankine plasticity model for improved prediction of tensile cracking in ceramic and concrete materials under impact[C]// Proceedings of the 14th DYMAT Technical Meeting. Sevilla，Spain：[s.n.]，2002：14–15.
[15] HUIRONG-ANITA A I，AHRENS T J. Dynamic tensile strength of terrestrial rocks and application to impact cratering[J]. Meteoritics and Planetary Science，2004，39(2)：233–246. |
|
|
|
2014, Vol. 33 
