Simulation of Mold Filling in Resin Transfer Molding by Non-Conforming Finite Elements
Simulation of Mold Filling in Resin Transfer Molding by Non-Conforming Finite Elements
复制标题
非相容有限元树脂传递模塑充模模拟
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
Z. Zhang
中科院分区：
文献类型：
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作者：
F. Trochu;R. Gauvin;Z. Zhang
随着纤维增强复合材料的大型部件越来越多地通过树脂传递模塑（RTM）工艺生产，注射过程的计算机模拟可以帮助模具设计者充分定位注射口和通气孔，并在填充过程中验证模具的完整性。树脂浸渍通常被建模为通过多孔介质的流动（达西定律）。在我们的模型中，达西方程求解在每个时间步内的饱和部分的模具使用非协调有限元。之所以选择这种方法，是因为近似的流速整体上考虑了跨单元边界的连续性的物理条件。通过计算机模拟可以得到树脂压力分布和树脂前沿位置。
As large components of fiber reinforced composite materials are being increasingly produced by the Resin Transfer Molding (RTM) process, a computer simulation of the injection process can help the mold designer to position adequately the injection ports and the air vents and to verify the integrity of the mold during the filling process. The resin impregnation is usually modeled as a flow through a porous medium (Darcy’s law). In our model, Darcy equation is solved at each time step inside the saturated part of the mold using non-conforming finite elements. This method was chosen because the approximated flow rates respect integrally the physical condition of continuity across the interelement boundaries. The resin pressure distributions and the resin front positions may be obtained through the computer simulation.