Lattice Boltzmann method for the simulation of multiphase flows through fibrous porous media arising in Resin Transfer Molding

用于模拟树脂传递模塑中产生的纤维多孔介质多相流的格子玻尔兹曼方法

• 批准号: 4561-2012
• 负责人: Reggio, Marcelo
• 金额: $ 1.46万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=568362
• 关键词: Lattice; Boltzmann; method; simulation; multiphase

New materials known as composites are widely used in manufacturing sectors today, among them the marine, automotive and aerospace industries. Modern aircraft contain a number of components built with these man-made materials, and it is highly important to make these components lighter, while maintaining and even improving their mechanical strength. In this context, our project concerns the industrial moulding of composite materials (CM) in a process called Resin Transfer Moulding (RTM). Essentially, this process consists of fitting a reinforcement material (woven fabric) impregnated with a resin solution inside a mould cavity. Once the resin has solidified, the particular shape given by the mould (a boat hull, for example) is obtained, producing a high quality part. Current RTM processes produce a certain amount of air entrapment (porosity), which harms the mechanical properties of CM. Consequently, porosity reduction in RTM is a primary industrial goal. However, the main factors causing this problem are not yet fully understood. In this respect, our work in this project is aimed at developing a computerized alternative to experimentally prototyping the mould-filling process, that is, a computer program for performing virtual RTM. This methodology has the advantage of being less costly and less time-consuming than the one currently used, and will enable engineers to simulate as many processes as needed, with different resin injection points and flow rates, and various types of fabrics, until a piece with enhanced mechanical properties is obtained. The success of this project will be guaranteed by our expertise and know-how in flow modelling and on comparisons with experimental data available from the work of RTM experts.

复合材料这种新材料如今广泛应用于制造业，其中包括船舶、汽车和航空航天工业。现代飞机包含许多用这些人造材料制造的部件，使这些部件变得更轻，同时保持甚至提高其机械强度非常重要。 在此背景下，我们的项目涉及复合材料 (CM) 的工业成型，称为树脂传递模塑 (RTM) 工艺。本质上，该过程包括将浸渍有树脂溶液的增强材料（编织物）安装到模具型腔内。树脂固化后，即可获得模具赋予的特定形状（例如船体），从而生产出高质量的零件。 目前的RTM工艺会产生一定量的空气滞留（孔隙率），这会损害CM的机械性能。因此，降低 RTM 中的孔隙率是一个主要的工业目标。然而，造成这一问题的主要因素尚未完全清楚。在这方面，我们在这个项目中的工作旨在开发一种计算机化替代方案来对模具填充过程进行实验原型设计，即用于执行虚拟 RTM 的计算机程序。这种方法的优点是比目前使用的方法成本更低、耗时更少，并且使工程师能够根据需要模拟尽可能多的工艺，使用不同的树脂注射点和流量以及各种类型的织物，直到获得具有增强机械性能的部件。 我们在流动建模方面的专业知识和技术以及与 RTM 专家工作中获得的实验数据的比较将保证该项目的成功。