Research topic: |
The role of the fibre joint region on the mechanical properties of fibre networks |
Recruiting organization: |
KTH Royal Institute of Technology, Stockholm, Sweden |
Application deadline: |
March 11th 2018 |
Starting time: |
June 2018 or as mutually agreed (1-2 months changes to the intended starting time are possible) |
Contract duration: |
36 months |
Benefits |
The candidate will be fully employed at KTH on a graduate student position. For such a position the benefits of the Swedish welfare system are available. |
This research project contributes to the FibreNet objectives by increased knowledge on the contribution of geometrical and material properties of individual fibre bonds on the overall mechanical response of the fibre network.
The effect of the fibre joint region on the deformation and strength of the network will be thoroughly studied using a two-scale approach. Knowing the role of the bonds is essential for developing energy-efficient packaging materials.
We will approach the problem on the network scale. The majority of the theoretical and numerical models does not resolve the joined region and account for its finite elasticity. This can partly be the reason why the analytical models based upon the assumption of rigid fibre bonds consistently overestimate the elastic properties of the fibre networks. However, the exact reason why the fibres “underperform” is still under debate. We will resolve this problem in this project using a combination of the modelling and novel fibre-level experimental tools.
Results: The project will develop a two-scale micromechanical model and incorporate the data acquired from the novel fibre-level experimental tools. The expected results from the project are as follows:
1. Numerical platform incorporating the results of the micro-mechanical testing on the fibre scale.
2. Established connection between the mechanical properties of individual fibres, fibre joints and the properties of the entire fibre network.
3. Knowledge which assists to developing solutions which target the fibre joints for maintaining the target properties of the packaging materials at a minimum cost.
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In case no suitable candidates are found, KTH reserves the right to re-open the call.