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摘要
为了理解液相条件下激光辐照碳纤维所形成的温度场及其与相关工艺参数间的关系,构建了碳纤维丝束受激光辐照的物理模型,利用多物理场耦合分析软件ANSYS,对激光辐照流场中的碳纤维所受温度场进行数值模拟,计算得到了温度分布及其与激光功率、纤维移动速度之间的关系曲线。结果表明,碳纤维表面附近的温度分布,主要取决于激光功率和纤维移动速度,可以通过增大激光功率或减小纤维移动速度,来提高碳纤维表面温度。作为对比,也模拟了碳纤维在空气中受激光辐照的情形,发现在空气中碳纤维表面温度会迅速升高,造成纤维断裂;而在液相条件下激光辐照碳纤维,纤维温度更加平稳,因而易于控制。碳纤维在液相条件下进行激光辐照的温度达到稳定所需的时间,远小于在空气中进行激光辐照的情形。
Abstract
To understand the temperature field formed by laser irradiation of carbon fiber(CF) under liquid phase conditions and its relationship with related process parameters,a physical model of the CF bundle subjected to laser irradiation was constructed.The multi-physics coupling analysis software ANSYS was used to analyze the laser irradiation.Numerical simulation of the temperature field of the CF in the illumination flow field was performed.The temperature distribution and the relationship curve between the temperature distribution and the laser power and the fiber moving speed were calculated.The results shown that the surface temperature distribution of the CF during modification mainly depended on the laser power and fiber moving speed.Simulations have found that the temperature of the CF during modification can be improved by increasing the laser power and reducing the fiber moving speed.When the CF surface was modified by laser in the air,the temperature rised rapidly until the fiber breaked.When the CF was modified by underwater laser,the fiber temperature distribution was controlled within a range,and the degree of the CF modification was more stable and sufficient.
关键词
碳纤维
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激光辐照
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多物理场耦合
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温度分布
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数值模拟
Key words
carbon fiber
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laserirradiation
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multiphysics coupling
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temperature distribution
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numerical simulation
液相流场中激光辐照碳纤维温度场的数值模拟[J].
化工新型材料, 2022, 50(7): 170-174 DOI:10.19817/j.cnki.issn1006-3536.2022.07.036
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基金资助
中央高校基本科研业务费项目(XK1802-3)
