LASER-INDUCED THERMAL–MECHANICAL DAMAGE CHARACTERISTICS OF CLEARTRAN MULTISPECTRAL ZINC SULFIDE WITH TEMPERATURE-DEPENDENT PROPERTIES

Yajing Peng (), Yanxue Jiang and Yanqiang Yang ()
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Yajing Peng: Department of Physics, Bohai University, Jinzhou 121000, P. R. China;
Yanxue Jiang: Department of Physics, Bohai University, Jinzhou 121000, P. R. China
Yanqiang Yang: Department of Physics, Harbin Institute of Technology, Harbin 150001, P. R. China

Surface Review and Letters (SRL), 2015, vol. 22, issue 01, 1-9

Abstract: Laser-induced thermal–mechanical damage characteristics of window materials are the focus problems in laser weapon and anti-radiation reinforcement technology. Thermal–mechanical effects and damage characteristics are investigated for cleartran multispectral zinc sulfide(ZnS)thin film window materials irradiated by continuous laser using three-dimensional (3D) thermal–mechanical model. Some temperature-dependent parameters are introduced into the model. The temporal-spatial distributions of temperature and thermal stress are exhibited. The damage mechanism is analyzed. The influences of temperature effect of material parameters and laser intensity on the development of thermal stress and the damage characteristics are examined. The results show, the von Mises equivalent stress along the thickness direction is fluctuant, which originates from the transformation of principal stresses from compressive stress to tensile stress with the increase of depth from irradiated surface. The damage originates from the thermal stress but not the melting. The thermal stress is increased and the damage is accelerated by introducing the temperature effect of parameters or the increasing laser intensity.

Keywords: Thermal–mechanical effect; damage; temperature-dependent properties; laser irradiation; windows material (search for similar items in EconPapers)
Date: 2015
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DOI: 10.1142/S0218625X15500146

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