Simulation Study of Laser Energy Coupling Coefficient in the Process of Ablating Glass Fiber/Epoxy Composites

Guoliang, 彭国良 Peng; Taijiao, 杜太焦 Du; Feng, 刘峰 Liu; Xianghua, 张相华 Zhang

doi:10.3788/cjl201441.0203001

Cited by 4 publications

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“…There was a large absorption coefficient of residual carbon to the laser. The energy absorption rapidly transitions from bulk absorption to surface absorption [12,13]. The mechanical cracking effect was attenuated, and the ablation was mainly caused by a thermal effect, as shown in the ablation morphology corresponding to B in Figure 4.…”

Section: Frontiers In Physics Frontiersinorgmentioning

confidence: 99%

“…Charles et al [9][10][11] established a calculation model related to the temperature field distribution and interlaminar stress of composite materials under laser irradiation. Peng Guoliang et al [12,13] constructed a model related to the energy coupling rate in the laser ablation process. The results indicated that the laser absorption mode was transitioned from bulk absorption to surface absorption with the increase of laser fluence.…”

Section: Introductionmentioning

confidence: 99%

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Research on the ablation characteristics of combined lasers for glass fiber reinforced plastic composites

Xiao,

Ren,

Guo

et al. 2023

Front. Phys.

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Glass fiber reinforced plastic (GFRP) composites have been applied to the manufacture of missile shields and unmanned aerial vehicle (UAV) shells. It is of great significance to explore the ablation characteristics of different lasers for these composites. Currently, most existing studies on the ablation characteristics of lasers for Glass fiber reinforced plastic composites are conducted under a single laser output mode, such as continuous wave (CW) laser or pulsed laser. However, the ablation characteristics of combined lasers for Glass fiber reinforced plastic composites have not been clarified. Therefore, the ablation characteristics of single lasers (continuous wave, millisecond (ms) pulsed, or nanosecond (ns) pulsed laser) and combined laser (CW/ms or CW/ns combined pulsed lasers) were investigated by experimental and simulation methods in this study. Additionally, the ablation mechanisms of Glass fiber reinforced plastic under different laser irradiation conditions were compared and analyzed. The results demonstrated that the ablation rates of single lasers for Glass fiber reinforced plastic composites were all within an order of magnitude of 10 μg/J, which was not significantly correlated with the light source system. The ablation efficiency of the single laser was determined by the incident laser energy. The continuous wave laser was found to be the optimal light source for the ablation and destruction of Glass fiber reinforced plastic composites. Nevertheless, there were some obstacles in the ablation process of continuous wave lasers. Applying pulsed lasers during the irradiation of the continuous wave laser may generate a synergistic effect. Under the conditions in this study, the CW/ns pulsed combined laser increased the ablation efficiency by 53.8%.

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Section: Frontiers In Physics Frontiersinorgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Research on the ablation characteristics of combined lasers for glass fiber reinforced plastic composites

Xiao,

Ren,

Guo

et al. 2023

Front. Phys.

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“…6 The infrared laser absorption of a char-like product can increase by two orders of magnitude, leading to a bulk-to-surface absorption transition. 5,10 However, the notable enhancement in absorption to microwave is observed at a higher temperature of ∼900°C. 11,12 This is explained by the graphitization reaction of amorphous carbon at high temperatures, 6,13 which enhances the electric polarization and conductivity owing to the disorder-to-order transition.…”

Section: Introductionmentioning

confidence: 99%

“…Several organic groups exist, such as ─OH, C─H, and C─O 6 . The infrared laser absorption of a char-like product can increase by two orders of magnitude, leading to a bulk-to-surface absorption transition 5 , 10 . However, the notable enhancement in absorption to microwave is observed at a higher temperature of ∼900°C 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Modeling the microwave transmittance of glass fiber-reinforced plastics subjected to laser ablation

Guo

Liu

et al. 2022

Opt. Eng.

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. The microwave transmittance of glass fiber-reinforced plastic (GFRP) slabs subjected to continuous-wave laser ablation was studied in the framework of continuum mechanics. First, a one-dimensional physical model involving laser absorption, heat conduction, resin pyrolysis, thermal radiation, and convection heat transfer was established to obtain the temperature field. An experiment-based absorption coefficient was proposed to capture the bulk-to-surface absorption transition during laser ablation. Second, the complex dielectric constant was modeled using a solid-state kinetic model describing the graphitization of pyrolysis products. The microwave reflectivity and transmittance were calculated based on the dielectric constant distribution. The agreement of the temperature and microwave transmittance with the experimental results suggests the feasibility of the model. The influence of laser power density, material thickness, and tangential airflow velocity on microwave transmittance was studied based on the model. The microwave transmittance changed nonmonotonically with increasing slab thickness owing to the competition between different physical mechanisms. The existence of tangential airflow reduced the decrease in microwave transmittance, particularly for weaker lasers. This study provides a useful physical model for predicting the microwave transmittance performance of GFRP in extreme heat environments.

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亚音速切向气流下连续激光对玻璃纤维增强树脂基复合材料的穿孔效应

Chen Geng,

Tang Jie,

Zhou yiqing

et al. 2023

中国激光

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Objective Glass fiber reinforced polymer (GFRP) with excellent wavetransparent properties are the preferred choice for optoelectronic devices and microwave dielectric materials owing to their high strength, light weight, and excellent electrical properties. Traditional cutting techniques for processing GFRP have problems such as severe tool wear, low efficiency, and low accuracy. The application of laser processing can solve these problems and has broader application prospects. However, some

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Simulation Study of Laser Energy Coupling Coefficient in the Process of Ablating Glass Fiber/Epoxy Composites

Cited by 4 publications

References 0 publications

Research on the ablation characteristics of combined lasers for glass fiber reinforced plastic composites

Research on the ablation characteristics of combined lasers for glass fiber reinforced plastic composites

Modeling the microwave transmittance of glass fiber-reinforced plastics subjected to laser ablation

亚音速切向气流下连续激光对玻璃纤维增强树脂基复合材料的穿孔效应

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