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Author: Straub, Thomas
Publisher: KIT Scientific Publishing
Published: 2016-06-15
Total Pages: 234
ISBN-13: 3731504715
DOWNLOAD EBOOK →Author: Thomas Straub
Publisher:
Published: 2020-10-09
Total Pages: 222
ISBN-13: 9781013283901
DOWNLOAD EBOOK →This book investigates the fatigue mechanisms and crack initiation of Ni, Al and Cu on a small-scale in the Very High Cycle Fatigue regime by means of innovative fatigue experimentation. A novel custom-built resonant fatigue setup showed that the sample resonant frequency changes with increasing cycle number due to fatigue damage. Mechanisms such as slip band formation have been observed. Cyclic hardening, vacancy and oxidation formation may be considered as early fatigue mechanisms. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Author: Hans-Jürgen Christ
Publisher: Springer
Published: 2018-11-19
Total Pages: 628
ISBN-13: 365824531X
DOWNLOAD EBOOK →This book represents the final reports of the scientific projects funded within the DFG-SPP1466 and, hence, provides the reader with the possibility to familiarize with the leading edge of VHCF research. It draws a balance on the existing knowledge and its enhancement by the joint research action of the priority program. Three different material classes are dealt with: structural metallic materials, long-fiber-reinforced polymers and materials used in micro-electro-mechanical systems. The project topics address the development of suitable experimental techniques for high-frequency testing and damage monitoring, the characterization of damage mechanisms and damage evolution, the development of mechanism-based models and the transfer of the obtained knowledge and understanding into engineering regulations and applications.
Author: Eslami, Reza
Publisher: KIT Scientific Publishing
Published: 2017-05-03
Total Pages: 144
ISBN-13: 3731505835
DOWNLOAD EBOOK →Author: Schöller, Lukas
Publisher: KIT Scientific Publishing
Published: 2024-03-15
Total Pages: 230
ISBN-13: 3731513404
DOWNLOAD EBOOK →During the production of fiber-reinforced thermosets, the resin material undergoes a reaction that can lead to damage. A two-stage polymerization reaction is modeled using molecular dynamics and evaluations of the system including a fiber surface are performed. In addition, a phase-field model for crack propagation in heterogeneous systems is derived. This model is able to predict crack growth where established models fail. Finally, the model is used to predict crack formation during curing.
Author: Röhe, Maximilian
Publisher: KIT Scientific Publishing
Published: 2024-01-09
Total Pages: 178
ISBN-13: 3731512343
DOWNLOAD EBOOK →In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
Author: Schulz, Sebastian
Publisher: KIT Scientific Publishing
Published: 2017-02-22
Total Pages: 248
ISBN-13: 3731506181
DOWNLOAD EBOOK →Author: Ankit, Kumar
Publisher: KIT Scientific Publishing
Published: 2016-05-31
Total Pages: 242
ISBN-13: 373150491X
DOWNLOAD EBOOK →Author: Fett, Theo
Publisher: KIT Scientific Publishing
Published: 2022-07-11
Total Pages: 226
ISBN-13: 3731511487
DOWNLOAD EBOOK →Water diffusing into silica surfaces gives rise for several effectson diffusion behaviour and mechanical properties. Water added to silica glass increases its specific volume so that the silica expands near the surface. Mechanical boundary conditions give rise for compressive “swelling stresses”. This fact provides a tool for the interpretation of many experimental observations from literature.
Author: Birkholz, Oleg
Publisher: KIT Scientific Publishing
Published: 2022-10-05
Total Pages: 246
ISBN-13: 373151172X
DOWNLOAD EBOOK →Hierarchically structured active materials in electrodes of lithium-ion cells are promising candidates for increasing gravimetric energy density and improving rate capability of the system. To investigate the influence of cathode structures on the performance of the whole cell, efficient tools for calculating effective transport properties of granular systems are developed and their influence on the electrochemical performance is investigated in specially adapted cell models.
