反冲塞效应的热弹性理论分析(Ⅱ)──反鼓包运动<sup>*</sup>

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反冲塞效应的热弹性理论分析(Ⅱ)──反鼓包运动^*

基金项目: * 国家863高技术激光领域的资助

Laboratory for Nonlinear Mechanics of Continuous Media(LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, P. R. China

摘要: 本文对我们新近发现的长脉冲激光束对金属薄片材料的一种新的破坏方式──“反冲塞”效成(RPE)的反鼓包运动进行了热弹性理论分忻。在不考虑膜力和弯矩相互耦合的小变形热弹性板理论情形下,将挠度ω分解为准静态部分ω_s和动态部分ω_d,得到了挠度ω的精确解。同时还分析了等效热载荷以及对早期运动状态进行了无量纲分析。这些分析能较好地定性解释反冲塞效应的早期运动状态即反鼓包运动特征。
- 长脉冲激光束 /
- 反冲塞效应 /
- 小变形 /
- 热弹性板理论 /
- 反鼓包运动
Abstract: Tile reverse-bulge motion(RBW) in the metallic foils. which is induced by spatially cylindrical long pulse laser. is examined in order to analyse the newly-discovered reverse-plugging effect(RPE). An uncoupled, thin plate theory is Used to determine the induced. flexural vibrations. The solution is obtained as the superposition of two displacement. fields, representing the quasi-static and the dynamic behaviors.Meanwhile. the equivalent thermal loading and the dimensionless analysis of thin plate motion are presented. Numerical results presented may partially explain the RBM of thin plate at the early stage of laser irradiation.
- long-pulsed laser beam /
- the RPE /
- the RBM /
- thermal-elastic /

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