A numerical study on Rayleigh-Taylor instability of aluminum plates driven by detonation  

作　　者：HE ChangJiang,ZHOU HaiBing & HANG YiHong Institute of Applied Physics and Computational Mathematics,Laboratory of Computational Physics,Beijing 100088,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第2期195-198,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program (Grant No. 2005CB321703);the National Natural Science Foundation of China (Grant No. 10676005);CAEP Science and Technology Foundation (Grant No. 2007A09001);the Foundation of National Key Laboratory of Computational Physics (Grant No. 9140C6901010901)

摘　　要：The authors,using elastic-plastic hydrodynamic code,present the Rayleigh-Taylor (RT) instability of Al plates driven by high-explosive detonation. Our numerical study assumes the material is fluid,or it is an elastic-plastic solid,and we compare the results of these simulations with the experimental data. For the numerical simulation of Rayleigh-Taylor instability of the metal driven by high-explosive detonation,the elastic-plastic effect must be assumed. The result of the simulation is different from the experiment,using only equation of state. However,the growth of perturbation agrees well with the measured growth under the second assumption. There is a cutoff wavelength for RT instability of the metal. The growth of perturbation is stable for short wavelength. The growth increases rapidly as the wavelength increases.The authors,using elastic-plastic hydrodynamic code,present the Rayleigh-Taylor (RT) instability of Al plates driven by high-explosive detonation. Our numerical study assumes the material is fluid,or it is an elastic-plastic solid,and we compare the results of these simulations with the experimental data. For the numerical simulation of Rayleigh-Taylor instability of the metal driven by high-explosive detonation,the elastic-plastic effect must be assumed. The result of the simulation is different from the experiment,using only equation of state. However,the growth of perturbation agrees well with the measured growth under the second assumption. There is a cutoff wavelength for RT instability of the metal. The growth of perturbation is stable for short wavelength. The growth increases rapidly as the wavelength increases.

关 键 词：interface INSTABILITY ELASTIC-PLASTIC NUMERICAL simulation 

分 类 号：O344.3[理学—固体力学]