Finite Element Simulation for Laser Ablation of Carbon Fiber Epoxy Composite
Finite Element Simulation for Laser Ablation of Carbon Fiber Epoxy Composite
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DOI：
10.4028/www.scientific.net/amm.66-68.715
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发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
Jin Zhang;L. Long
中科院分区：
文献类型：
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作者：
Jin Zhang;L. Long
为了预测激光烧蚀孔的大小和形状，建立了三维有限元模型来模拟激光烧蚀碳纤维环氧复合材料。对于给定的辐照条件，与孔洞尺寸相关的实验数据符合得很好。数值计算结果和实验观测表明，随着辐照时间的延长，被测区域的温度迅速升高，离光斑中心越远，温升越小。0.093s后，目标表面温度高于复合材料的临界温度，材料在第一层上发生剥离。还可以观察到，激光在材料内部和等温带以及环形山边缘的热能是阶梯状的。
In order to predict the size and shape of the laser ablative hole, a 3D finite element model was developed to simulate the Nd:YAG laser ablation of carbon fiber epoxy composite. For given irradiation conditions, good agreement with experimental data relating to hole dimensions. The numerical results and experimental observations indicate that with the irradiation time increasing, the domain under investigation temperature raises rapidly and the further to the spot center, the smaller the temperature raises. After 0.093s the target surface temperature is higher than the critical temperature of composite, so the removal of the material on first composite layer occurs. It also can be observed that heat energy of the laser spread within the material and the isotherm ribbon, as well as crater border, is step-like.