Simulation of the thermoforming process of UD fiber-reinforced thermoplastic tape laminates
Simulation of the thermoforming process of UD fiber-reinforced thermoplastic tape laminates

Author: Dörr, Dominik

Publisher: KIT Scientific Publishing

Published: 2021-10-29

Total Pages: 334

ISBN-13: 3731509989

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In this work, initially, the requirements on a simulation model of the non-isothermal stamp forming process of unidirectional fiber-reinforced, and thermoplastic tape laminates are investigated experimentally. On this basis, different isothermal as well as a fully coupled thermomechanical simulation model under consideration of the crystallization kinetics are developed. For validation, a complex shaped geometry is simulated and compared to experimental forming results.

Process simulation of wet compression moulding for continuous fibre-reinforced polymers
Process simulation of wet compression moulding for continuous fibre-reinforced polymers

Author: Poppe, Christian Timo

Publisher: KIT Scientific Publishing

Published: 2022-07-18

Total Pages: 332

ISBN-13: 3731511908

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Interdisciplinary development approaches for system-efficient lightweight design unite a comprehensive understanding of materials, processes and methods. This applies particularly to continuous fibre-reinforced plastics (CoFRPs), which offer high weight-specific material properties and enable load path-optimised designs. This thesis is dedicated to understanding and modelling Wet Compression Moulding (WCM) to facilitate large-volume production of CoFRP structural components.

Fiber-dependent injection molding simulation of discontinuous reinforced polymers
Fiber-dependent injection molding simulation of discontinuous reinforced polymers

Author: Wittemann, Florian

Publisher: KIT Scientific Publishing

Published: 2022-11-18

Total Pages: 180

ISBN-13: 3731512173

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This work presents novel simulation techniques for injection molding of fiber reinforced polymers. These include approaches for anisotropic flow modeling, hydrodynamic forces from fluid on fibers, contact forces between fibers, a novel fiber breakage modeling approach and anisotropic warpage analysis. Due to the coupling of fiber breakage and anisotropic flow modeling, the fiber breakage directly influences the modeled cavity pressure, which is validated with experimental data.

Green Composites Manufacturing
Green Composites Manufacturing

Author: Gurminder Singh

Publisher: Walter de Gruyter GmbH & Co KG

Published: 2024-05-20

Total Pages: 373

ISBN-13: 3111067769

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In today's society researchers are more focused on cleaner materials production for environmental sustainability. This approach aims at reducing waste and the development of materials with enhanced properties and functionality. This book focuses on optimizing manufacturing processes for sustainable composite materials. It discusses optimum utilization of resources by using minimum effort to save cost and energy.

Mesoscale simulation of the mold filling process of Sheet Molding Compound
Mesoscale simulation of the mold filling process of Sheet Molding Compound

Author: Meyer, Nils

Publisher: KIT Scientific Publishing

Published: 2022-07-12

Total Pages: 292

ISBN-13: 3731511738

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Sheet Molding Compounds (SMC) are discontinuous fiber reinforced composites that are widely applied due to their ability to realize composite parts with long fibers at low cost. A novel Direct Bundle Simulation (DBS) method is proposed in this work to enable a direct simulation at component scale utilizing the observation that fiber bundles often remain in a bundled configuration during SMC compression molding.

Experimental investigation and process simulation of the compression molding process of Sheet Molding Compound (SMC) with local reinforcements
Experimental investigation and process simulation of the compression molding process of Sheet Molding Compound (SMC) with local reinforcements

Author: Hohberg, Martin

Publisher: KIT Scientific Publishing

Published: 2022-04-05

Total Pages: 216

ISBN-13: 3731510073

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In this book, a new three-dimensional approach for the process simulation of SMC is developed. This approach takes into account both, the core layer that is dominated by the extensional viscosity and the thin lubrication layer. In order to transfer the information from the process to the structure simulation, a CAE chain is further developed. In addition, a new rheological tool is developed to analyze flow behavior experimentally and to provide the required material parameters.

Simulation of damage mechanisms in weave reinforced materials based on multiscale modeling
Simulation of damage mechanisms in weave reinforced materials based on multiscale modeling

Author: Naake, Dominik Robert

Publisher: KIT Scientific Publishing

Published: 2020-09-18

Total Pages: 304

ISBN-13: 3731510057

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A weave reinforced composite material with a thermoplastic matrix is investigated by using a multiscale chain to predict the macroscopic material behavior. A large-strain framework for constitutive modeling with focus on material non-linearities, i.e. plasticity and damage is defined. The ability of the geometric and constitutive models to predict the deformation and failure behavior is demonstrated by means of selected examples.

Manufacturing-constrained multi-objective optimization of local patch reinforcements for discontinuous fiber reinforced composite parts
Manufacturing-constrained multi-objective optimization of local patch reinforcements for discontinuous fiber reinforced composite parts

Author: Fengler, Benedikt

Publisher: KIT Scientific Publishing

Published: 2021-03-31

Total Pages: 200

ISBN-13: 3731510065

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In this work, contributes to the optimization of local continuous fiber reinforcement patches, under consideration of manufacturing constraints. This approach requires specific optimization strategies. Therefore, an multi-objective optimization strategy for the placement of local reinforcement patches, under consideration of manufacturing constraints, has been developed. During the multi objective optimization, structural and process related objectives are considered.

Numerical prediction of curing and process-induced distortion of composite structures
Numerical prediction of curing and process-induced distortion of composite structures

Author: Bernath, Alexander

Publisher: KIT Scientific Publishing

Published: 2021-10-29

Total Pages: 294

ISBN-13: 3731510634

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Fiber-reinforced materials offer a huge potential for lightweight design of load-bearing structures. However, high-volume production of such parts is still a challenge in terms of cost efficiency and competitiveness. Numerical process simulation can be used to analyze underlying mechanisms and to find a suitable process design. In this study, the curing process of the resin is investigated with regard to its influence on RTM mold filling and process-induced distortion.

Stochastic Range Estimation Algorithms for Electric Vehicles using Data-Driven Learning Models
Stochastic Range Estimation Algorithms for Electric Vehicles using Data-Driven Learning Models

Author: Scheubner, Stefan

Publisher: KIT Scientific Publishing

Published: 2022-06-03

Total Pages: 190

ISBN-13: 3731511665

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This work aims at improving the energy consumption forecast of electric vehicles by enhancing the prediction with a notion of uncertainty. The algorithm itself learns from driver and traffic data in a training set to generate accurate, driver-individual energy consumption forecasts.