| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eder, M.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022Validation of material models for sheet metals using new test equipmentcitations
- 2021Potentials for material card validation using an innovative toolcitations
- 2021Microstructural features influencing the mechanical performance of the Brazil nut (Bertholletia excelsa) mesocarpcitations
- 2019Temperature-based determination of the onset of yielding using a new clip-on device for tensile tests
- 2019Innovative Tool for Material Model Assessment and Improvement
- 2018Investigation on strain dependent elastic behavior for accurate springback analysiscitations
- 2017Process-integrated Compensation of Geometrical Deviations for Bulk Formingcitations
- 2015Characterizing moisture-dependent mechanical properties of organic materialscitations
- 2013"Sensor-filter" - intelligent micro filter system in foil technology
- 2008Stress generation in the tension wood of poplar is based on the lateral swelling power of the G-layercitations
- 2007Tensile and compressive stresses in tracheids are induced by swelling based on geometrical constraints of the wood cellcitations
- 2007Dislocations in single hemp fibres-investigations into the relationship of structural distortions and tensile properties at the cell wall levelcitations
- 2005Properties of chemically and mechanically isolated fibres of spruce (Picea abies wL.x Karst.). Part 3: Mechanical characterisationcitations
Places of action
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article
Characterizing moisture-dependent mechanical properties of organic materials
Abstract
<p>Nanoindentation is an ideal technique to study local mechanical properties of a wide range of materials on the sub-micron scale. It has been widely used to investigate biological materials in the dry state; however, their properties are strongly affected by their moisture content, which until now has not been consistently controlled. In the present study, we developed an experimental set-up for measuring local mechanical properties of materials by nanoindentation in a controlled environment of relative humidity (RH) and temperature. The significance of this new approach in studying biological materials was demonstrated for the secondary cell wall layer (S2) in Spruce wood (Picea abies). The hardness of the cell wall layer decreased from an average of approximately 0.6 GPa at 6% RH down to approximately 0.2 GPa at 79% RH, corresponding to a reduction by a factor of 3. Under the same conditions, the indentation modulus also decreased by about 40%. The newly designed experimental set-up has a strong potential for a variety of applications involving the temperature- and humidity-dependent properties of biological and artificial organic nanocomposites.</p>