Junior Research Group of Dr. Christoph Eberl

Research Project

Small-scale fatigue takes place in many applications such as micro-electro-mechanical-systems, surface acoustic wave devices and microelectronics, in which cyclic loading leads to failure. Multiaxial fatigue experiments with micro samples at kHz frequencies require novel experimental setups. Therefore, resonant micro fatigue systems for uniaxial and multiaxial cyclic loading have been developed. Finite Element simulations have shown that dimensions of the samples can be chosen in a way that the resonant frequencies of bending and torsional modes are very close, which is a requirement for multiaxial cyclic loading. For the initial tests, samples made from copper, aluminium, or nickel with a rectangular cross section of 500 µm by 200 μm have been used. Hence, scaling and size effects are expected to dominate reliability of such components. The recent experiments show that the resolution of the resonant system allows to observe and study the initiation of slip bands and short cracks.

 

Education and Qualifications

2009 (August) / Today

Karlsruhe Institute of Technology.

Ph.D Student

 

2008 (Sept) / 2009 (June)

Double major.

University Blaise-Pascal, Clermont-Ferrand, France.
Master Science and Technology.
Specialisation: Solid Mechanical.
Materials, Polymer, Composite, Probability-Reliability, Optimization, Gauging.

2005 (Sept) / 2009 (June)   

IFMA  (French Institute of Advanced Mechanics), Clermont-Ferrand, France.
MSc in 2009 – Engineer. Specialisation: PSt (Products and Structures).

Diploma thesis : Theoritical study and implementation of size effects in HCF (high cycle fatigue) and VHCF (very high cycle fatigue)

2003 (Sept) / 2005 (June)   

Lycée Claude Gellée, Epinal, France.
Preparatory classes to enter engineering schools.

1999 (Sept) / 2003 (June)

Lycée Pierre Mendès France, Epinal, France.
Scientific Baccalaureate with distinction. Specialisation: Industrial Technology.

 

Employment and Work Experience

2008 (August -> Jan)

TU/e, University of technology, Eindhoven, The Netherlands, 6 months.
Analyse of the crack’s propagation on a sample with Linux.

2008 (Feb -> Juli)

FZK (Forschungszentrum Karlsruhe GmbH), Karlsruhe, Germany, 6 months.
FE eigen-frequency analysis for a novel resonant micro fatigue setup, with Ansys.

2007 (Sept -> Jan)

5th semester project, IFMA, Clermont-Ferrand, France, 150 hours.
Behaviour and fracture of layered materials.

2007 (June - July)

Nordon Industries, Nancy, France, 2 months.
Design and development of a prototype in order to filter, to heat and to analyse a sample
gaz from a smokestack, with the Software Catia V5.

2007 (March -> June)

4th semester project, IFMA, Clermont-Ferrand, France, 90 hours.
Modelling of cracking in a composite laminated (FEM) with Ansys.

2006 (July)

Honeywell, Thaon-les-Vosges, France, 1 month.
Operator on a line of assembly of turbocompressor.