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激光辐照CFRP下温度对铺层结构的敏感性研究

Study on the sensitivity of temperature to laminated structure under laser irradiation of CFRPs

  • 摘要: 为了研究连续激光作用下层叠型碳纤维增强环氧树脂基复合材料(CFRP)的铺层结构对材料温度的影响, 采用有限元软件COMSOL模拟连续激光辐照5种典型层叠型CFRP的烧蚀过程。通过材料表面的温度偏差, 获得了5种典型层叠型CFRP的温度分布和演化规律; 通过对材料整体温度分布进行统计分析, 获得了材料温度均匀性随激光辐照时间的变化规律。结果表明, 由单向层叠加而成的CFRP在材料表面光斑边缘附近温度对铺层结构最为敏感, 呈非单调变化; 在5种典型的结构中45°夹角铺层结构的CFRP整体温度分布最为均匀。此研究结果有助于进一步研究激光辐照下复合材料的热力学破坏。

     

    Abstract: In order to study the influence of laminated structures of carbon fiber reinforced polymer (CFRP) on the temperature under continuous wave (CW) laser irradiation, the ablation processes of five typical laminated CFRPs irradiated by CW laser were simulated by using finite element software COMSOL. The temperature distribution and evolution of five typical laminated composites were obtained by the temperature deviation of the material surface. Meanwhile, based on analyzing the overall temperature distribution of the materials statistically, the variations of the temperature uniformity of the materials with the laser irradiation time were obtained. The results show that the surface temperature near the edge of the spot is most sensitive to the laminated structure in unidirectional ply CFRPs and the temperature curve is non-monotonic. Moreover, the temperature uniformity of CFRP with 45° angle laminated structure is the best in the five types. The results of this work can be referenced for the study of thermomechanics damage of CFRP induced by laser.

     

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