Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Numerical simulation of plasma dynamics in laser shock processing experiments
Year:2008
Research Areas
  • Mechanical engineering,
  • Naval engineering,
  • Construction materials
Information
Abstract
Laser Shock Processing (LSP) is based on the application of a high intensity pulsed Laser beam (I > 1 GW/cm2; tau > 50 ns) on a metallic target forcing a sudden vaporization of its surface into a high temperature and density plasma that immediately develops inducing a shock wave propagating into the material. Laser energy is deposited at the interface between the target and the confining material. The pressure generated by the plasma induces two shock waves propagating in opposite directions. When the laser is switched off, the plasma continues to maintain a pressure which decreases during its expansion. For longer times the projectile-like expansion of the heated gas inside the interface adds further mechanical momentum to the target. HELIOS is a 1-D radiation-hydrodynamics lagrangean fluiddynamic code used to simulate the dynamic evolution of laser created plasmas. In this paper, this code is used to study the influence of laser parameters (energy per pulse, pulse length, wavelength) on plasma pressure. Temperature, density and ionization degree profiles are shown for typical laser parameters in laser shock experiments. Plasma dynamics numerical simulation is fundamental to numerically obtainfinal stresses in the target material. Mutually coupled numerical simulation / experimental diagnosis results can be defined as a consistent way for LSP monitoring and control and to experimentally control laser shock processing in industrial applications.
International
Si
Congress
E-MRS SPRING MEETING 2008. SYMPOSIUM B
960
Place
ESTRASBURGO (FRANCIA)
Reviewers
Si
ISBN/ISSN
0000000000
Start Date
26/05/2008
End Date
30/05/2008
From page
1
To page
1
ABSTRACTS WEB EMRS
Participants
  • Autor: Juan Antonio Porro Gonzalez (UPM)
  • Autor: Jose Luis Ocaña Moreno (UPM)
  • Autor: Miguel Morales Furio (UPM)
  • Autor: Carlos Luis Molpeceres Alvarez (UPM)
  • Autor: Manuel Blasco Litago (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería y Aplicaciones del Láser
  • Centro o Instituto I+D+i: Centro Laser
  • Departamento: Física Aplicada a la Ingeniería Industrial
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