Vibrations of microscale circular plates induced by ultra-fast lasers
Vibrations of microscale circular plates induced by ultra-fast lasers
复制标题
DOI：
10.1016/j.ijmecsci.2008.07.006
复制
发表时间：
2008-09
影响因子：
7.3
通讯作者：
Yuxin Sun;M. Saka
中科院分区：
文献类型：
--
作者：
Yuxin Sun;M. Saka
本文研究了脉冲激光加热微尺度圆板时的振动现象。圆板由硅制成，并通过具有2 ps的脉冲持续时间的非高斯激光束在上表面上均匀加热，该激光束由于热弹性耦合效应而激发振动。温度场和应力场的耦合作用导致能量耗散，机械能转化为热能，这是不可逆的。采用基于拉普拉斯变换的解析-数值方法计算了振动中的挠度和热力矩。分析了尺寸效应。最后，对不同环境温度下圆板的振动特性进行了比较。
In this study, the vibration phenomena during pulsed laser heating of a microscale circular plate are investigated. The circular plate is made of silicon and is heated uniformly on the upper surface by a non-Gaussian laser beam with a pulse duration of 2ps, which incites vibration due to the thermoelastic coupling effect. The coupling between the temperature field and stress field induces energy dissipation and converts mechanical energy into heat energy, which is irreversible. An analytical–numerical technique based on the Laplace transform is utilized to calculate the vibration of the deflection and thermal moment. The size effect is analyzed. Finally, the vibration behaviors of the circular plate under different environmental temperatures are compared.