Rayleigh-Taylor Instability in Elastoplastic Solids: A Local Catastrophic Process.
نویسندگان
چکیده
We show that the Rayleigh-Taylor instability in elastoplastic solids takes the form of local perturbations penetrating the material independently of the interface size, in contrast with the theory for simple elastic materials. Then, even just beyond the stable domain, the instability abruptly develops as bursts rapidly moving through the other medium. We show that this is due to the resistance to penetration of a finger which is minimal for a specific finger size and drops to a much lower value beyond a small depth (a few millimeters).
منابع مشابه
Evaluation of the Dynamic Yield Strength of Solids by Means of the Richtmyer-Meshkov Instability
An experimental procedure to evaluate the dynamic yield strength of solids based on measuring the growth of the Richtmyer-Meshkov instability is proposed. To induce the Richtmyer-Meshkov instability in solids a shock is needed, so this technique is complementary to the one based on the Rayleigh-Taylor instability that is achieved by means of an isentropic compression. We have presented an analy...
متن کاملInstabilities in elastic accelerated solids
When a solid plate is accelerated by an external pressure 0 p an instability similar to the Rayleigh-Taylor one appears if the plate is not perfectly flat. Due to the elastoplastic properties of the material the growth of the instability is lower than in a pure fluid case. In a very simple interpretation, the pressure difference across the irregular surface provokes the instability that can be ...
متن کاملThe LAPLAS experiment: Rayleigh – Taylor instability in elastic solids
LAPLAS (Laboratory of Planetary Sciences) experiment [1] is one of the most interesting experimental schemes proposed for the study of equation of state and transport properties of high energy density matter in the framework of the FAIR (Facility for Antiproton and Ion Research) project [2]. This experiment involves a cylindrical implosion of a thick shell of Au or Pb driven by a heavy ion beam...
متن کاملModeling Rayleigh-Taylor Instability of a Sedimenting Suspension of Several Thousand Circular Particles in Direct Numerical Simulation
In this paper we study the sedimentation of several thousand circular particles in 2D using the method of distributed Lagrange multipliers for solid-liquid ow. The simulation gives rise to ngering which resembles Rayleigh-Taylor instabilities. The waves have a well de ned wavelength and growth rate which can be modeled as a conventional Rayleigh-Taylor instability of heavy uid above light. The ...
متن کاملRichtmyer-Meshkov instability in elastic solids
Richtmyer-Meskov (RM) instability is a well known phenomenon in hydrodynamics that occurs whenever a shock wave traverse the interface between two fluids. The LAPLAS (Laboratory of Planetary Sciences) experiment planned at GSI to be performed on the future FAIR facility for the study of high energy density states of matter, requires the low entropy implosion of a gold or lead cylinder driven by...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Physical review letters
دوره 116 15 شماره
صفحات -
تاریخ انتشار 2016