A smoothed particle hydrodynamics method is employed to study the mechanical and thermal behaviors of a fiber-filled composite with an anisotropic thermal conductivity (which is coupled to the orientation of the fibers) in a three-dimensional printing process for one- and two-layer deposition. Using a microstructure-based fiber suspension model with a fiber orientation-dependent thermal conductivity model, a temperature-shear-thinning viscosity model, and a microstructure constitutive model, the effect of the nozzle temperature on the fiber alignment when printing one layer and the mechanical and thermal interactions between two printed layers are investigated. It is found that the anisotropic thermal conductivity (fiber-orientation-dependent) enhances the fiber alignment in the printing direction in the upper half layer and reduces it in the lower half at a relatively high fiber concentration (Φ = 0.2). For the one-layer deposition, the fiber alignment in the printing direction is enhanced in the lower h...

中文翻译：

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纤维填充复合材料的非等温和热各向异性熔融沉积建模过程的平滑粒子流体动力学研究

使用平滑粒子流体动力学方法研究具有各向异性热导率（与纤维的取向耦合）的纤维填充复合材料在单层和双层的三维打印过程中的机械和热行为沉积。使用基于微结构的纤维悬浮模型与纤维取向相关的热导率模型、温度-剪切稀化粘度模型和微结构本构模型，在打印一层时喷嘴温度对纤维排列的影响和机械并研究了两个印刷层之间的热相互作用。发现各向异性热导率（取决于纤维取向）增强了上半层打印方向上的纤维排列，并在相对较高的纤维浓度（Φ = 0.2）下降低了下半层的纤维排列。对于一层沉积，打印方向上的纤维排列在较低的h...