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首页> 外文期刊>Journal of Applied Polymer Science >Modeling and simulation of fiber-reinforced polymer mold-filling with phase change
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Modeling and simulation of fiber-reinforced polymer mold-filling with phase change

机译：具有相变的纤维增强聚合物充模的建模与仿真

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A gas-solid-liquid three-phase model for the simulation of fiber-reinforced composites mold-filling with phase change is established. The influence of fluid flow on the fibers is described by Newton's law of motion, and the influence of fibers on fluid flow is described by the momentum exchange source term in the model. A revised enthalpy method that can be used for both the melt and air in the mold cavity is proposed to describe the phase change during the mold-filling. The finite-volume method on a non-staggered grid coupled with a level set method for viscoelastic-Newtonian fluid flow is used to solve the model. The "frozen skin" layers are simulated successfully. Information regarding the fiber transformation and orientation is obtained in the mold-filling process. The results show that fibers in the cavity are divided into five layers during the mold-filling process, which is in accordance with experimental studies. Fibers have disturbance on these physical quantities, and the disturbance increases as the slenderness ratio increases. During mold-filling process with two injection inlets, fiber orientation around the weld line area is in accordance with the experimental results. At the same time, single fiber's trajectory in the cavity, and physical quantities such as velocity, pressure, temperature, and stresses distributions in the cavity at end of mold-filling process are also obtained. (C) 2015 Wiley Periodicals, Inc.
机译：建立了气固液三相模型，用于模拟纤维增强复合材料充模时的相变。流体对纤维的影响由牛顿运动定律描述，纤维对流体的影响由模型中的动量交换源项描述。提出了一种可用于模具型腔中的熔体和空气的改进的焓法，以描述模具填充过程中的相变。使用非交错网格上的有限体积方法和粘弹性牛顿流体流动的水平集方法来求解模型。成功模拟了“冷冻皮肤”层。有关纤维变形和取向的信息是在模具填充过程中获得的。结果表明，在模具填充过程中，型腔中的纤维分为五层，这与实验研究一致。纤维对这些物理量有干扰，并且随着纤细比的增加，干扰也会增加。在具有两个注射口的模具填充过程中，围绕熔合线区域的纤维取向与实验结果一致。同时，还获得了模腔内单纤维的轨迹，以及模注过程结束时模腔内的物理量，例如速度，压力，温度和应力分布。 （C）2015年Wiley Periodicals，Inc.

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