Out-of-autoclave prepreg consolidation: Coupled air evacuation and prepreg impregnation modeling
Out-of-autoclave prepreg consolidation: Coupled air evacuation and prepreg impregnation modeling
复制标题
热压罐外预浸料固结：耦合排气和预浸料浸渍建模
DOI：
10.1177/0021998315592005
复制
发表时间：
2016
影响因子：
2.9
通讯作者：
R. Hinterhölzl
中科院分区：
文献类型：
--
作者：
R. Helmus;T. Centea;P. Hubert;R. Hinterhölzl
非高压釜烧结通过复杂的固结过程生产低孔隙率部件，该过程包括通过部分浸渍的微观结构和随后的树脂渗透流动进行空气排空。在这篇文章中，我们提出，开发和验证的第一个模型描述了这个固结过程中计算的材料在加工过程中的厚度变化。首先模拟抽气时间随纤维填充和压力条件的变化。然后，固化期描述的流动和压实现象建模。模型预测与几个实验案例研究进行了比较，结果表明大多数材料性能和工艺参数的影响都得到了很好的捕捉，并用于参数研究以确定关键趋势。
Out-of-autoclave prepregs produce low-porosity parts through a complex consolidation process that includes air evacuation through a partially impregnated microstructure and subsequent resin infiltration flow. In this article, we propose, develop, and validate the first model describing this consolidation process by computing the thickness change of the material during processing. The air evacuation period is first simulated as a function of fiber packing and pressure conditions. Then, the cure period is described by modeling flow and compaction phenomena. Model predictions are compared to several experimental case studies, which show that the effect of most material properties and process parameters is well captured, and used in parametric studies to identify key trends.