Revealing thermal-mechanical hybrid ablation mechanism in carbon fiber reinforced plastic laser cutting by acoustic emission monitoring

被引:5
作者
Chen, Long [1 ,2 ]
Rong, Youmin [1 ,2 ,3 ]
Huang, Yu [1 ,2 ]
Li, Wenyuan [1 ,2 ]
Chen, Xinhua [1 ,2 ]
Zhang, Guojun [1 ,2 ]
机构
[1] Huazhong Univ Sci & Technol, State Key Lab Digital Mfg Equipment & Technol, Wuhan, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Mech Sci & Engn, Wuhan, Peoples R China
[3] Natl Innovat Inst Digital Design & Mfg, Laser Mfg Inst, Wuhan, Peoples R China
关键词
CFRP; Laser cutting; Acoustic emission; Laser ablation; Mechanical denudation;
D O I
10.1016/j.measurement.2023.113473
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The ablation mechanism of CFRP laser cutting refers to complex thermal and mechanical behaviour, and should be investigated. Two processing mechanisms of thermal ablation (TA) and mechanical denudation (MD) were found. TA resulted from the vaporization of the material formed by the accumulation of laser energy, which is reflected by RMS of AE signal < 0.14 V. MD resulted from the material that was stripped from the substrate under the impact of the plasma plume, which is reflected by 0.14 V < RMS < 0.175 V; The processing mechanism of MD exists simultaneously in the same trajectory and adjacent trajectory scanning. When the mechanism of MD in the same trajectory scanning is most severe, RMS also reaches the maximum value of 0.23 V; The RMS has the same variation law as the material removal rate. When the removal rate reaches the maximum value of 12.2 x 10(7) mu m(3)/s, the RMS curve also reaches its highest point, and the model prediction accuracy is greater than 89%.
引用
收藏
页数:10
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