Modelling and simulation of the hydrodynamic properties of protection and filter fabrics under consideration of service loads to predict their barrier and permeability properties

在考虑使用载荷的情况下对防护和过滤织物的流体动力学特性进行建模和模拟，以预测其阻隔和渗透特性

基本信息

批准号：
255549700
负责人：
Professor Dr.-Ing. Chokri Cherif
金额：
--
依托单位：
Fraunhofer-Institut für Techno- und Wirtschaftsmathematik (ITWM)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2016-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/255549700?language=en
关键词：
Modelling simulation hydrodynamic properties protection

项目摘要

Many applications require technical textiles that combine defined permeability and retention properties. Mono- or multifilament woven fabrics have advantages compared to nonwovens and membranes. They can transfer large forces so that they overtake a supporting function in addition to their barrier function. These requirements are partly in the opposite direction so that the selection of a filter medium is a highly complex problem, in which the application needs and the characteristics of the filter must be considered balanced. The aim of the research project is the realistic simulation of the permeability and barrier properties of protective and filter fabrics under service loads to derive general laws and to purposefully develop woven fabrics with specific properties. The following scientific objectives are pursued:- Characterization of the fabric morphology and fabric characteristics for detecting the fundamental relationships between the machine parameters, the process parameters and the fabric construction as well as the fabric properties,- Establishment of a general model based on an artificial neural network to predict the fabric morphology and hydrodynamics (permeability, particle retention) as a function of the machine and process parameters,- Understanding of the multi-scale morphology changes of the fabrics at the micro, meso and macro level under consideration of in-plane service loads and development of a methodology for the in-situ detection of the pore geometry in uni- and biaxial stress states (tension and shear) during and after static and cyclic loading,- Numerical modeling, simulation and validation of the pore geometry changes at the micro scale (pores in the yarn) and meso scale (pores between the yarns) under stresses,- Modeling and simulation of multiphase hydrodynamic properties (permeability, particle retention) using CFD method in micro- and meso-structure for unstressed and stressed fabrics,- Formulation of laws for the connection between the machine and process parameters on the one hand and the material parameters, the resulting fabric morphology and the service properties resulting from the pore morphology (e. g., permeability, retention and filtration) on the other hand.At the end of the research project, it should be possible to develop textile filter materials based on simulations with significantly less effort. In addition, the validated models and the established simulation tools should contribute to a deeper understanding of the basics of complex retention mechanisms in fabrics with different functional requirements.

许多应用需要结合特定渗透性和保留性能的产业用纺织品。与无纺布和膜相比，单丝或多丝机织物具有优势。它们可以传递巨大的力，从而除了屏障功能之外还具有支撑功能。这些要求部分是相反的，因此过滤介质的选择是一个非常复杂的问题，其中必须平衡应用需求和过滤器的特性。该研究项目的目的是真实模拟防护和过滤织物在使用负载下的渗透性和阻隔性能，以得出一般规律并有目的地开发具有特定性能的机织织物。追求以下科学目标： - 表征织物形态和织物特性，以检测机器参数、工艺参数和织物结构以及织物特性之间的基本关系， - 建立基于人工的通用模型神经网络来预测织物形态和流体动力学（渗透性、颗粒保留）作为机器和工艺参数的函数，-在考虑因素的情况下，了解织物在微观、中观和宏观层面的多尺度形态变化飞机服务负载和方法开发用于在静态和循环加载期间和之后原位检测单轴和双轴应力状态（拉伸和剪切）下的孔隙几何形状，-微尺度孔隙几何形状变化的数值建模、模拟和验证（孔隙中的孔隙）纱线）和应力下的细观尺度（纱线之间的孔隙），- 使用 CFD 方法对无应力和应力织物的微观和细观结构进行多相流体动力学特性（渗透性、颗粒保留）的建模和模拟，- 配方一方面是机器和工艺参数与材料参数、所得织物形态和由孔隙形态产生的使用性能之间的联系的法则（例如，另一方面，在研究项目结束时，应该可以以更少的努力开发基于模拟的纺织过滤材料。此外，经过验证的模型和已建立的模拟工具应有助于更深入地了解具有不同功能要求的织物中复杂保留机制的基础知识。