La nature, source d'inspiration et de solutions mécaniques optimisées
The Bio-inspired Design team seeks to know how nature has realized limited-motion kinematic connections and how to inspire them to propose new artificial links for industrial mechanisms.
The theme of the team is centred during this quadrennial on the design of bio-inspired kinematic connections.
For this we propose a new classification of living species with a mechanical point of view because classical and phylogenetic classifications are not adapted to solve our problems of industrial mechanics.
In this classification, each class groups all species with the same topology to a factor of near proportionality.
For each class, a geometric model parameterized allows to address all the instances of the class via a geometric variation.
Each geometric model is linked to a specific musculoskeletal analytic model (kinematic and inverse dynamics).
Gram matrices and Gröbner bases are the mathematical foundations of these analytical models.
They make it possible to extract the overall mechanical performances of each biological bond of an instance of the class.
The mechanical loads deduced previously are then introduced into local models making it possible to know the distribution of the contact pressures and the underlay stresses.
The experience, leads us to orient ourselves towards the approach of Boussinesq to master the contact.
This work makes it possible for any species class to extrapolate the performances of the links of these living beings from an accessible instance.
It is carried out in the sub-theme of research: Reverse design.
At the same time, in the sub-theme: Manufacture and testing of bio-inspired links, optimization of the use of processes for obtaining new bio-inspired links, in particular the additive manufacturing and finishing of structured or non-serrated surfaces.
This optimization will pass through the modelling of the finishing operations to obtain a functional surface.
A particular attention will be paid to the control of residual stresses imposed by the processes, a characteristic that may limit the performance of the new connections.
Design; Kinematic; Inspiration; Mechanical; Contact; Geometric accuracy; Surface ; Biomechanics