单脉冲平顶激光清洗CFRP的多物理场特性研究
Research on multi-physics field characteristics of the single-pulse top-hat laser cleaning CFRP
刘国春 1陈光澳 1杨文锋 1李绍龙 1王文轩1
作者信息
- 1. 中国民用航空飞行学院航空工程学院,四川广汉 618307
- 折叠
摘要
为探究平顶激光清洗碳纤维增强复合材料(CFRP)的作用机制,本研究考虑CFRP的组分对激光的吸收、反射特性差异显著,将激光载荷分层施加到CFRP的细观有限元模型上,引入热烧蚀-热应力双重作用效果,还原不同能量密度下单脉冲平顶激光清洗形貌,并完成了试验验证.结果表明:分层施加激光载荷较传统表面加载模式能够有效提升仿真精度,采用热烧蚀-热应力双重判据能够进一步提升形貌还原效果,本研究模型的仿真形貌长轴贴合度不低于96.64％,面积贴合度达到80.00％,并通过高精度模型瞬时温度场分布能够指导激光清洗CFRP表面树脂的实际工艺.
Abstract
In order toinvestigate the mechanism of top-hat laser cleaning of carbon fiber reinforced composite(CFRP),considering the significant differences in the absorption and reflection characteristics of the components of CFRP,the laser load is layered to the meso-finite element model of CFRP.The dual effect of thermal ablation and thermal stress is introduced to restore the morphology of single-pulse flat-top laser cleaning at different energy densi-ties,and to complete the experimental validation.The results show that the layered application of laser load can effec-tively improve the simulation accuracy compared with the traditional surface loading mode,and the dual criterion of thermal ablation-thermal stress can further improve the morphology reduction effect.The long-axis accuracy of the sim-ulated topography of this model is not less than 96.64％,and the area accuracy reaches 80.00％.Therefore,the in-stantaneous temperature field distribution of high-precision models can guide the actual process of laser cleaning of CFRP surface resin.
关键词
平顶脉冲激光/分层施加/碳纤维复合材料/多物理场/形貌还原Key words
top-hat pulsed laser/layered application/carbon fiber composites/multi-physics field/topography restoration引用本文复制引用
基金项目
四川省科技厅重点研发项目(2021YFSY0025)
出版年
2024
NETL
NSTL
万方数据