New solutions for the manufacturing of spacer preforms for thermoplastic textile-reinforced lightweight structures

“…The application of multi‐layer‐knitted fabrics favors comparatively higher mechanical properties, since the reinforcement fiber bundles are elongated within the manufactured textile preform. Thus, effects concerning the undulation of the fiber bundles can be avoided …”

Section: Hybrid Yarn Textile Preforms and Their Processingmentioning

confidence: 99%

“…Based on their good mechanical properties, and the possibility of a highly productive processing as well as due to their good recyclability, textile‐reinforced thermoplastics gain in importance . Especially the three‐dimensional hybrid yarn textile thermoplastics, developed within the Collaborative Research Centre 639 (SFB 639), possess a high potential regarding an efficient manufacturing of function‐integrative lightweight components . The production of thermoplastic hybrid yarns offers a bride range of variation possibilities.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Process Specific Material Behavior of Thermoplastic Hybrid Yarn Textiles

et al. 2015

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For the manufacturing of complex function integrative lightweight components, the pressing process specific material behavior of thermoplastic hybrid yarn textiles plays a significant role. A fundamental knowledge of the compression and heating behavior of the textile preforms is required for an efficient development of adapted tool systems. This paper focuses on the dependency of compression behavior and thermal conductivity of the glass/ polypropylene textile on varied pressure and temperature values. To analyze the thermal conductivity, the Hot Disc method is used. In general, positive trends for increasing applied pressure and temperature values on the thermal conductivity are obtained.

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“…The control circuit is hence interconnected. (de Weldige, 1996) A similar model is described in Grossmann et al (2010). The focus there is on the production of spacer fabrics.…”

Section: 44simulating Fabric Productionmentioning

confidence: 99%

Simulation

Gries¹,

Veit²,

Wulfhorst³

et al. 2014

Textile Technology

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Simulation is normally used in order to analyze systems that are hard or impossible to describe using systems of explicit equations. In particular, this applies to highly complex dynamic systems such as most textile machines and processes.By carrying out a simulation experiment, knowledge about the real system can be gathered comparatively easily in contrast to trials on the machine or during the actual process. This includes practical experiments as well as a simulation using a computer program. Another field of application of simulations are systems that do not yet exist. This comprises the testing of new plant design concepts or for example the development of new spacecraft and aircraft or automobiles using carbon textile reinforced composites. 14.1Simulation with and without ComputerIn general, simulation methods can be divided into those that use a computer and those that do not, as shown in Fig. 14.1. Those simulations without computer can be separated into destructive and nondestructive methods. Simulations that use a computer can either be based on technical models (for example, finite element method for structural composites, computational fluid dynamics for polymer flows), on examples taken from nature (for example, artificial neural networks, evolutionary algorithms for machine setting optimization), and those based on analytical equations (for example, warp tension during weaving). Simulation Coauthor: Y.-S. Gloy 14.3 Modeling 14.3.1Types of ModelingIn order to save time and hence money, most simulation models use a simplified description of the real process or machine. Figure 14.2 shows typical models. Modeling Gray box Parts of system known ComponentsBlack box Behavior known Inner structure known White box Inner structure know Abstraction Reduction Figure 14.2 Principles of modeling White-Box ModelThis kind of model is suitable if the inner structure of the system is known. This structure is then deliberately abstracted, modified, and reduced to the most important influencing parameters. A typical example is the modeling of a weaving machine. Black-Box ModelIf the inner structure of a system is unknown but its behavior or its interaction with other systems can be observed and modeled, this is called a black-box model. A typical example is the use of neural networks to simulate textile processes. Gray-Box ModelIn many cases, only parts of a system are fully known and only a few, but not all, interactions between its components are established. The respective model is then called a gray-box model. In order to save costs, this approach is widely used. A fuzzy model can be regarded as a gray-box model in some cases. Model SimplificationIn order to simplify a model compared to reality, the following possibilities are often used:Components that are not of crucial significance are not taken into account. A trial based on factorial design can be helpful to determine the important influencing parameters.Unimportant details are neglected.The system is split into its components and these are analyzed separatel...

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New solutions for the manufacturing of spacer preforms for thermoplastic textile-reinforced lightweight structures

Cited by 27 publications

References 4 publications

Characterization of thermoplastic natural fibre composites made from woven hybrid yarn prepregs with different weave pattern

Characterization of thermoplastic natural fibre composites made from woven hybrid yarn prepregs with different weave pattern

Experimental Investigation of Process Specific Material Behavior of Thermoplastic Hybrid Yarn Textiles

Simulation

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