1 北京理工大学机械与车辆学院激光微纳制造实验室，北京 100081
2 中国空间技术研究院北京卫星制造厂有限公司，北京 100094
碳纤维增强复合材料（CFRP）以其轻质高强、可设计性强等优势已成为航空航天领域不可或缺的关键材料之一。为满足制造装备的要求，需对一体成型的CFRP构件进行二次加工，然而CFRP非均质、各向异性、层合结构等特征使其在加工过程中易出现分层、毛刺、热影响区较大等缺陷。概述了CFRP各种加工方法的研究进展，对比分析了CFRP不同加工方法的优缺点，从方法、工艺及机理层面介绍了激光加工CFRP的研究现状，总结了CFRP在航空航天领域中的应用，分析讨论了CFRP激光加工当前面临的挑战和今后的研究重点。
激光技术 碳纤维增强复合材料 加工工艺 超快激光 航空航天
Author Affiliations
Abstract
1 Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
2 Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0511, USA
A surprising phenomenon can be discovered by using femtosecond double-pulse ablation of silicon and germanium in ethanol. The ablation areas present an oscillation increase phenomenon when the pulse delay increases from 200 fs to 1 ps in the fluence range of 0.5–0.6 J/cm2. In contrast, the ablation areas exhibit an oscillation decrease phenomenon as the pulse delay increases when the laser fluence F<0.5 J/cm2, which is consistent with the results of the experiment in air. It is considered that the adjustment of the photon–electron coupling efficiency by pulse train technology plays an important role in the ablation process.
140.3390 Laser materials processing 320.5540 Pulse shaping 320.2250 Femtosecond phenomena Chinese Optics Letters
2015, 13(4): 041402
