首页|Laser ablation mechanism and performance of glass fiber-reinforced phenolic composites:An experimental study and dual-scale modelling

Laser ablation mechanism and performance of glass fiber-reinforced phenolic composites:An experimental study and dual-scale modelling

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Both experimental and simulation approaches were employed to investigate the laser ablation mechanism and performances of Glass Fiber Reinforced Phenolic Composites(GFRP).During the ablation process,the difference in thermal conductivities of the glass fibers and the resin matrix as well as their discrepant physical and chemical reactions form a conical ablation morphol-ogy.The formation of a residual carbon layer effectively mitigates the ablation rate in the thickness direction.A higher power density results in a faster ablation rate,while a longer irradiation time leads to a larger ablation pit diameter.To account for the variation in thermal conductivity between the fiber and resin,a macro-mesoscale model was developed to differentiate the matrix from the fiber components.Finite element analysis revealed that laser irradiation leads to phenolic decompo-sition,glass fiber melting vaporization,and residual carbon skeleton evaporation.The dual-scale model exhibits precise prediction capabilities concerning the laser ablation process of GFRP,and its accuracy is confirmed through the comparison of simulation and experimental results for the GFRP laser ablation process.This model provides a feasible method for performance evaluation and lifetime prediction of GFRP subjected to continuous wave laser irradiation.

Polymer-matrix compositesContinuous-wave laserMicrostructural analysisAblation mechanismFinite element method

Ran BI、Pengfei SHEN、Longyu ZHU、Zhengzheng MA、Chuyang LUO、Yongfeng LI、Lijian PAN

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Shanghai Key Laboratory of Lightweight Composite,Donghua University,Shanghai 201620,China

Shanghai High Performance Fibers and Composites Center(Province-Ministry Joint),Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China

AVIC Composite Corporation Ltd,Beijing 101300,China

Fundamental Research Funds for the Central Universities,ChinaYoung Elite Scientists Sponsorship Program by the China Association for Science and Technology

2232022D-282016QNRC001

2024

10.1016/j.cja.2024.05.042

中国航空学报(英文版)
中国航空学会

中国航空学报(英文版)

CSTPCDEI
影响因子：0.847
ISSN：1000-9361
年,卷(期)：2024.37(8)
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