Efficient simulation of bending behavior of spiral strands: a strategy based on computational homogenization
A spiral strand is a multilayer cable in which each layer consists of helically shaped wires that exhibit axial-torsional and axial-bending coupling. The main objective of this thesis has been to develop low-cost estimators for both the macroscopic (moment-curvature) and microscopic (axial force of individual wires) responses of these strands. For this purpose, the in-house finite element code, Multifil, has been verified against the available experimental data.
Then, a computational homogenization framework for spiral strands has been developed and verified with the results obtained from Multifil. A rheological model and a semi-analytical model have been proposed to predict respectively the macroscopic and microscopic responses of spiral strands subjected to biaxial bending under variable axial force. The models have been verified with the responses obtained by homogenization.
The jury will be composed of :
- Patrice CARTRAUD - Professor - École Centrale de Nantes (Rapporteur)
- Luca MARTINELLI - Associate Professor - Politecnico di Milano (Rapporteur)
- Olivier THOMAS - Professor - ENSAM Lille (Examiner)
- Vanessa DÖRLICH - Research Engineer - Fraunhofer Institute for Industrial Mathematics ITWM (Examiner)
- Michaël MARTINEZ - Research Engineer IFP Énergies nouvelles (Examiner)
- Pierre-Alain GUIDAULT - Professor - LMPS, ENS Paris-Saclay (Examiner)
- Damien DURVILLE - CNRS Research Fellow - LMPS, CentraleSupélec (Thesis Supervisor)