Fatigue Of Micro Molded Materials Aluminum Bronze And Yttria Stabilized Zirconia
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| Author | : Kennerknecht, Tobias |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 284 |
| Release | : 2014-12-04 |
| Genre | : Technology (General) |
| ISBN | : 3731502933 |
Custom built setups were developed to investigate micro samples during quasistatic and cyclic testing in tension, compression and bending. Micro molded CuAl10Ni5Fe4-samples showed similar fatigue behavior compared to macroscopic samples due to both the sample size and microstructure being scaled down with the manufacturing process. Results from cyclic three-point bending tests on micro molded 3Y-TZP suggested that a minimum crack extension is necessary to develop cyclically degradable shielding.
| Author | : Tobias Kennerknecht |
| Publisher | : |
| Total Pages | : 274 |
| Release | : 2020-10-09 |
| Genre | : Technology & Engineering |
| ISBN | : 9781013281846 |
Custom built setups were developed to investigate micro samples during quasistatic and cyclic testing in tension, compression and bending. Micro molded CuAl10Ni5Fe4-samples showed similar fatigue behavior compared to macroscopic samples due to both the sample size and microstructure being scaled down with the manufacturing process. Results from cyclic three-point bending tests on micro molded 3Y-TZP suggested that a minimum crack extension is necessary to develop cyclically degradable shielding. 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 | : |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2014 |
| Genre | : |
| ISBN | : 9781000043839 |
This thesis deals with the nonlinear aspects of superconducting quantum interference devices (SQUIDs) as magnetic meta-atoms. Such meta-atoms are usually resonant structures that constitute the basic building blocks of a metamaterial with the purpose of giving the material unconventional magnetic properties. Due to their intrinsic nonlinearity, SQUIDs exhibit a number of phenomena such as frequency tunability and multi-stability that make them attractive as controllable meta-atoms.
| Author | : Eslami, Reza |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 142 |
| Release | : 2017-05-03 |
| Genre | : Technology (General) |
| ISBN | : 3731505835 |
The grain microstructure and damage mechanisms at the grain level are the key factors that influence fatigue of metals at small scales. This is addressed in this work by establishing a new micro-mechanical model for prediction of multiaxial high cycle fatigue (HCF) at a length scale of 5-100?m. The HCF model considers elasto-plastic behavior of metals at the grain level and microstructural parameters, specifically the grain size and the grain orientation.
| Author | : Straub, Thomas |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 234 |
| Release | : 2016 |
| Genre | : Technology (General) |
| ISBN | : 3731504715 |
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.
| Author | : Ankit, Kumar |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 240 |
| Release | : 2016-05-31 |
| Genre | : Technology (General) |
| ISBN | : 373150491X |
With the advent of high performance computing, the application areas of the phase-field method, traditionally used to numerically model the phase transformation in metals and alloys, have now spanned into geoscience. A systematic investigation of the two distinct scientific problems in consideration suggest a strong influence of interfacial energy on the natural and induced pattern formation in diffusion-controlled regime.
| Author | : Kumar, Amritesh |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 160 |
| Release | : 2017-11-06 |
| Genre | : |
| ISBN | : 3731506947 |
| Author | : Wobrock, Mark |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 252 |
| Release | : 2017-11-22 |
| Genre | : Diffraction |
| ISBN | : 3731506823 |
Single crystalline, μm-sized cantilevers are fabricated out of epitaxially grown Ag thin films by a lithography-based procedure and are deflected by a nanoindenter system. The microstructure of the plastically deformed cantile-vers is investigated using transmission Kikuchi diffraction (TKD) on the cantilever cross section. 3D discrete dislocation dynamics simulations (DDD) are performed for further analysis. A mechanism to explain the formation of dislocation networks upon loading is suggested.
| Author | : Trauth, Anna |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 468 |
| Release | : 2020-12-11 |
| Genre | : Technology & Engineering |
| ISBN | : 3731509504 |
The main objective of this work is to significantly deepen the understanding of the material and the structural behaviour of continuous-discontinuous SMC composites, following a holistic approach to investigate microscopic aspects, macroscopic mechanical behaviour as well as failure evolution at the coupon, structure and component level. In addition, criteria to evaluate the effect of hybridisation are introduced and modelling approaches are presented and discussed.
| Author | : Klinsmann, Markus |
| Publisher | : KIT Scientific Publishing |
| Total Pages | : 246 |
| Release | : 2016-03-08 |
| Genre | : Technology (General) |
| ISBN | : 3731504553 |
Fracture of storage particles is considered to be one of the major reasons for capacity fade and increasing power loss in Li-ion batteries. In this work, we tackle the problem by merging a coupled model of mechanical stress and diffusion of Li-ions with a phase field description of an evolving crack. The novel approach allows us to study the evolution of the Li concentration together with the initiation and growth of a crack in an arbitrary geometry and without presuming a specific crack path.
