Transient Multi-Phase Modelling of Process Dynamics in Ultrafast Laser Ablation of Metals
金属超快激光烧蚀过程动力学的瞬态多相建模
基本信息
- 批准号:245510492
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2015
- 资助国家:德国
- 起止时间:2014-12-31 至 2019-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
At the background of an increasing application of ultrafast laser systems in industrial production and latest progress in process simulation of laser based manufacturing techniques in the frame of the research project a numerical multi-phase simulation model for ultrafast laser ablation of metals, that images the transient dynamics of ablation and structuring processes with nano-, pico- and femtosecond laser pulses, shall be developed.The research effort is structured in four work packages that build up on one another. Based on the initial development of a numerical description for the absorption, heat conduction and ablation processes during the interaction of ultrashort laser pulses with metals, complete structuring processes shall be regarded. In the description of the absorption of ultrashort laser pulses on the surface of the workpiece, in the material volume and in the occurring plasma, besides a consideration of the changing optical properties with the temperature special focus lies on the modeling of nonlinear absorption phenomena. For the description of thermal processes during the interaction of ultrashort laser pulses with metals a heat conduction simulation based on the two-temperature model shall be developed, taking into account latent heats and temperature dependences in the thermal material properties. The modeling of the material ablation focuses on quantitative correct ablation volumes in the different pulse duration and fluence regions. Emanating from an incompressible description of the ablation process, a coupled compressible-incompressible multi-phase model for evaporation and plasma formation shall be implemented in the simulation. Finally, based on the developed model complex structuring processes with pulse sequences shall be regarded in order to image the influence of processing parameters (pulse duration, fluence, wavelength, pulse repetition rate) on the process and the processing result. These investigations are accompanied by extensive experimental analyses delivering the database and process knowledge for the model development. Besides, they serve for a verification of the developed models.The simulation model shall be used in order to characterize ablation processes of iron and copper with different pulse durations and laser wavelengths with respect to achievable structuring quality and ablation efficiency. Building up on a fundamental investigation of the beam-matter interaction processes, optimal processing parameters and processing strategies for the structuring with ultrashort laser pulses shall be identified. The simulation model shall set the base for a future simulation based process layout and planning in industrial ultrafast laser structuring.
在越来越多的超快激光系统在工业生产中的应用以及在研究项目框架中基于激光的制造技术的最新进展和最新进度的进度应开发使用纳米,皮卡和飞秒激光脉冲的消融和结构过程的动力学。研究工作的构造是在四个相互构建的工作包中进行的。基于最初开发用于吸收,热传导和消融过程在超短激光脉冲与金属的相互作用过程中的最初发展,应考虑完整的结构过程。在描述在工件表面上的超短激光脉冲吸收的描述中,材料体积和发生的等离子体中的吸收,除了考虑变化的光学特性以特殊的重点考虑到非线性吸收现象的建模。为了描述超短激光脉冲与金属的相互作用的热过程,应考虑到热材料特性中的潜热和温度依赖,基于两倍的模型的热传导模拟。材料消融的建模集中在不同的脉冲持续时间和通量区域中的定量正确消融量。从对消融过程的不可压缩描述中发出,在模拟中应实现用于蒸发和等离子体形成的可压缩不可压缩的多相模型。最后,基于开发的模型复杂的结构过程,应考虑使用脉冲序列,以成像处理参数(脉冲持续时间,频率,波长,波长,脉冲重复率)对过程和处理结果的影响。这些研究伴随着广泛的实验分析,为模型开发提供了数据库和过程知识。此外,它们用于验证开发模型。应使用模拟模型来表征具有不同脉冲持续时间和激光波长的铁和铜的消融过程,相对于可实现的结构质量和消融效率。在对梁 - 物体交互过程中的基本研究,最佳处理参数和使用超短激光脉冲的结构的处理策略上进行的基础研究。模拟模型应为未来的基于模拟的过程布局和计划中的工业超快激光结构设定基础。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr.-Ing. Michael Schmidt其他文献
Professor Dr.-Ing. Michael Schmidt的其他文献
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{{ truncateString('Professor Dr.-Ing. Michael Schmidt', 18)}}的其他基金
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