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首页> 外文期刊>Journal of thermal stresses >A memory response in the vibration of a microscale beam induced by laser pulse
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A memory response in the vibration of a microscale beam induced by laser pulse

机译：激光脉冲引起的微光束振动中的记忆响应

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摘要

In the application of pulsed laser heating, such as the laser hardening of metallic surfaces, the conduction limited process is the dominant mechanism during the laser-workpiece interaction. As a consequence, time unsteady analysis of this problem becomes necessary. The present study examines the effect of ultra-short-pulsed laser heating in the problem of coupled thermoelastic vibration of a microscale beam resonator. Due to the shortcomings of power law distributions in fractional derivatives, the usage of some other forms of derivatives with some other kernel functions is proposed. With this motivation, the heat transport equation is defined in an integral form of a common derivative on a slipping interval by incorporating the three-phase-lag memory-dependent heat transfer. Finite sinusoidal Fourier and Laplace transform techniques are then employed to determine the lateral vibration of the beam and the temperature increment within the medium. According to the graphical representations corresponding to the numerical results, conclusions about the new theory are drawn. An excellent predictive capability is demonstrated due to the presence of the energy absorption depth, memory dependent derivative, and delay time.
机译：在脉冲激光加热的应用中，例如金属表面的激光硬化，传导受限过程是激光与工件相互作用期间的主要机制。结果，有必要对该问题进行时间不稳定的分析。本研究探讨了超短脉冲激光加热在微束谐振器的热弹性耦合振动问题中的作用。由于分数导数的幂律分布的缺点，提出了将某些其他形式的导数与一些其他核函数一起使用的建议。通过这种动机，通过结合依赖于三相滞后记忆的传热，以滑动间隔上的公共导数的积分形式定义了热传递方程。然后采用有限正弦傅里叶变换和拉普拉斯变换技术来确定光束的横向振动和介质内的温度增量。根据与数值结果相对应的图形表示，得出了有关新理论的结论。由于存在能量吸收深度，与记忆有关的导数和延迟时间，因此证明了极好的预测能力。

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