Simulation of the main physical processes in remote laser penetration with large laser spot size | Zendy

Saad A. Khairallah | Zendy; Andrew T. Anderson | Zendy; Alexander M. Rubenchik | Zendy; J.N. Florando | Zendy; Shuai Wu | Zendy; H. Lowdermilk | Zendy

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Simulation of the main physical processes in remote laser penetration with large laser spot size

Author(s) -

Saad A. Khairallah,

Andrew T. Anderson,

Alexander M. Rubenchik,

J.N. Florando,

Shuai Wu,

H. Lowdermilk

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4918284

Subject(s) - laser , surface tension , materials science , laser power scaling , mechanics , penetration (warfare) , thermal , aluminium , penetration depth , thermal diffusivity , recoil , optics , composite material , physics , thermodynamics , operations research , engineering , quantum mechanics

A 3D model is developed to simulate remote laser penetration of a 1mm Aluminum metal sheet with large laser spot size (∼ 3x3cm2), using the ALE3D multi-physics code. The model deals with the laser-induced melting of the plate and the mechanical interaction between the solid and the melted part through plate elastic-plastic response. The effect of plate oscillations and other forces on plate rupture, the droplet formation mechanism and the influence of gravity and high laser power in further breaking the single melt droplet into many more fragments are analyzed. In the limit of low laser power, the numerical results match the available experiments. The numerical approach couples mechanical and thermal diffusion to hydrodynamics melt flow and accounts for temperature dependent material properties, surface tension, gravity and vapor recoil pressure

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