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.


Probabilistic Prediction of Energy Demand and Driving Range for Electric Vehicles with Federated Learning

Probabilistic Prediction of Energy Demand and Driving Range for Electric Vehicles with Federated Learning

Author: Thorgeirsson, Adam Thor

Publisher: KIT Scientific Publishing

Published: 2024-09-03

Total Pages: 190

ISBN-13: 3731513714

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In this work, an extension of the federated averaging algorithm, FedAvg-Gaussian, is applied to train probabilistic neural networks. The performance advantage of probabilistic prediction models is demonstrated and it is shown that federated learning can improve driving range prediction. Using probabilistic predictions, routing and charge planning based on destination attainability can be applied. Furthermore, it is shown that probabilistic predictions lead to reduced travel time.


Trajectory optimization based on recursive B-spline approximation for automated longitudinal control of a battery electric vehicle

Trajectory optimization based on recursive B-spline approximation for automated longitudinal control of a battery electric vehicle

Author: Jauch, Jens

Publisher: KIT Scientific Publishing

Published: 2024-03-01

Total Pages: 264

ISBN-13: 3731513323

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This work describes a method for weighted least squares approximation of an unbounded number of data points using a B-spline function. The method can shift the bounded B-spline function definition range during run-time. The approximation method is used for optimizing velocity trajectories for an electric vehicle with respect to travel time, comfort and energy consumption. The trajectory optimization method is extended to a driver assistance system for automated vehicle longitudinal control.


Experimental investigation of relevant road surface descriptors for tire-road noise measurements on low-absorbing road surfaces

Experimental investigation of relevant road surface descriptors for tire-road noise measurements on low-absorbing road surfaces

Author: Pinay, Julien

Publisher: KIT Scientific Publishing

Published: 2024-01-16

Total Pages: 196

ISBN-13: 3731513285

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Ihrer Arbeit in der Originalsprache: This work aims at identifying relevant road surface characteristics to mitigate tire-road noise of free-rolling tires using a systematic approach. As using open porous roads is already known as an efficient measure to reduce tire rolling noise, this study will focus on compact road surfaces which have a low acoustic absorption. Measurements on standardized ISO 10844 test tracks and on public roads are used to study the norm's representativity and its completeness.


Measurable Safety of Automated Driving Functions in Commercial Motor Vehicles - Technological and Methodical Approaches

Measurable Safety of Automated Driving Functions in Commercial Motor Vehicles - Technological and Methodical Approaches

Author: Elgharbawy, Mohamed

Publisher: KIT Scientific Publishing

Published: 2023-01-13

Total Pages: 268

ISBN-13: 3731512548

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With the further development of automated driving, the functional performance increases resulting in the need for new and comprehensive testing concepts. This doctoral work aims to enable the transition from quantitative mileage to qualitative test coverage by aggregating the results of both knowledge-based and data-driven test platforms. The validity of the test domain can be extended cost-effectively throughout the software development process to achieve meaningful test termination criteria.


Discontinuous Fiber Composites

Discontinuous Fiber Composites

Author: Tim A. Osswald

Publisher: MDPI

Published: 2019-01-15

Total Pages: 212

ISBN-13: 3038974919

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This book is a printed edition of the Special Issue "Discontinuous Fiber Composites" that was published in J. Compos. Sci.


Polypropylene Handbook

Polypropylene Handbook

Author: József Karger-Kocsis

Publisher: Springer

Published: 2019-03-18

Total Pages: 648

ISBN-13: 3030129039

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This book extensively reviews Polypropylene (PP), the second most widely produced thermoplastic material, having been produced for over 60 years. Its synthesis, processing and application are still accompanied by vigorous R&D developments because the properties of PP are at the borderline between those of commodity and engineering thermoplastics. Readers are introduced to various tacticities and polymorphs of PP, and their effects on structural properties. Further, the book addresses the control of optical properties using nucleants, provides strategies for overcoming the limited cold/impact resistance of PP, examines in detail the effects of recycling, and presents guidelines for the property modification of PPs through foaming, filling and reinforcing with respect to target applications. Special attention is paid to descriptions and models of properties as a function of morphological variables. Last but not least, the book suggests potential practical applications of PP-based systems, especially in the packaging, appliances, building/construction, textile and automotive sectors. Each chapter, written by internationally respected scientists, reflects the current state-of-art in the respective field and offers a vital source of information for students, researchers and engineers interested in the morphology, properties, testing and modeling of PP and PP-based systems. The content is indispensable to the appropriate application of PPs and related composites.


Science and Engineering of Short Fibre-Reinforced Polymer Composites

Science and Engineering of Short Fibre-Reinforced Polymer Composites

Author: Shao-yun Fu

Publisher: Woodhead Publishing

Published: 2019-08-24

Total Pages: 471

ISBN-13: 0081026242

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Science and Engineering of Short Fibre Reinforced Polymer Composites, Second Edition, provides the latest information on the 'short fiber reinforced composites' (SFRP) that have found extensive applications in automobiles, business machines, durable consumer items, sporting goods and electrical industries due to their low cost, easy processing and superior mechanical properties over parent polymers. This updated edition presents new developments in this field of research and includes new chapters on electrical conductivity, structural monitoring, functional properties, self-healing, finite element method techniques, multi-scale SFRCs, and both modern computational and process engineering methods. - Reviews the mechanical properties and functions of short fiber reinforced polymer composites (SFRP) - Examines recent developments in the fundamental mechanisms of SFRP's - Assesses major factors affecting mechanical performance, such as stress transfer and strength - Includes new chapters on electrical conductivity, structural monitoring, functional properties, self-healing, finite element method techniques, multi-scale SFRCs, modern computational methods, and process engineering methods


Injection Molding

Injection Molding

Author: Rong Zheng

Publisher: Springer Science & Business Media

Published: 2011-06-21

Total Pages: 194

ISBN-13: 3642212638

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This book covers fundamental principles and numerical methods relevant to the modeling of the injection molding process. As injection molding processing is related to rheology, mechanical and chemical engineering, polymer science and computational methods, and is a rapidly growing field, the book provides a multidisciplinary and comprehensive introduction to the subjects required for an understanding of the complex process. It addresses the up-to-date status of fundamental understanding and simulation technologies, without losing sight of still useful classical approaches. The main chapters of the book are devoted to the currently active fields of flow-induced crystallization and orientation evolution of fiber suspensions, respectively, followed by detailed discussion of their effects on mechanical property, shrinkage and warpage of injection-molded products. The level of the proposed book will be suitable for interested scientists, R&D engineers, application engineers, and graduate students in engineering.