The CMQ Industrie du Futur met Bruno Fabié, teacher at Lycée La Découverte in Decazeville and his students in the Pro CFAO License to introduce us to an introductory course in TOPOLOGICAL OPTIMIZATION. He explains to us what it consists of and how this method has considerably changed the way of designing objects in Industry..
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A little history…
It was between 1895 and 1904 thatHenri Poincaré founded the algebraic topology – then called Site Analysis. He publishes a series of 6 revolutionary memoirs which, among other things, will become founding texts, the whole of which represents a little more than 300 pages of exceptional mathematics!
As you will understand, topology is a branch of mathematics and appeared at the end of the 19th century.
More than a century later, the content of these memoirs not only remains topical but constitutes an obligatory passage for any apprentice topologist.
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To go further, we invite you to consult the site, very well documented and explained byHenri Paul de Saint-Gervais which is the name of a collective of mathematicians. This collective has met on several occasions to study Poincaré’s texts relating to this branch of mathematics. >>>>>>>>>>>>
CONCRETE, what is TOPOLOGY?
Roland Lehouc, Astrophysicist at the Atomic Energy and Alternative Energies Commission, enlightens us on the subject:
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topology in pro CFAO license
The educational course that we are presenting today consists of making CFAO Professional License students aware of new models and methodologies for the design of parts and assemblies in metal additive manufacturing called TOPOLOGICAL OPTIMIZATION.
Bruno Fabié explains that:
“This design is a break from the classic design known as subtractive manufacturing. ”
ZOOM ON Additive manufacturing: a revolution in the design of parts!
Unlike the subtractive process of removing material from a larger part, the processes of additive manufacturing or 3D printing build objects by adding material one layer at a time, with each successive layer bonded to the previous layer until the room is complete.
Just like the tools of Numerical Control by Calculator (C.N.C.)1 subtractive, additive manufacturing technologies create parts from models of Computer Aided Design and Manufacturing (C.F.A.O.)1. Preparing models for 3D printing using print preparation software is typically automated, making job setup much easier and faster compared to CNC tools.
“This kind of design work consists, for a given overall volume, of finding the optimal distribution of the material under given mechanical stresses. This method, in conjunction with additive manufacturing, makes it possible to manufacture virtually any geometry, significantly reducing the mass of the products. This design is reminiscent of synthetic (Eiffel Tower, Sagrada Familia, etc.) and organic (honeycomb, tree, bone structure, etc.) structures, in the form of a lattice or so-called lattice structures ”, explains Bruno Fabié.
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As part of this initiation into the topological optimization of an object, the teacher offers a variety of practical work to students throughout the school year.
The video below illustrates a practical case study where the students aim to model a chair in a 2D plane and 3D volume version, by changing certain parameters: material gain, position and intensity of mechanical loads, passive zone, etc.
Industrialists won over by this design method and manufacturing
“This new manufacturing approach, using these 2D (plane version) and 3D (volume version) design methods has aroused growing interest in many industrial sectors (automotive, aeronautics, medical, leisure, etc.) in recent years. on the one hand, to reduce production costs, on the other hand, to develop lighter and more functional parts. “ (Bruno Fabié)
Indeed, new skills in the use of dedicated software has enabled, for example, the manufacturer of heavy goods vehicles and coaches Scania to “reduce the weight of its parts by more than 30%. In addition, these simulations carried out from the design phase have made it possible to reduce development time and improve collaboration between the engineering, testing and development departments. “© source: Technology review n ° 203 – Special file College reform p.18 by Lynda ALLOUACHE and Jonathan VAN RHIJN
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“A limited edition, avant-garde of Lancôme Jasmins Marzipane packaging in 3D printing”.
A new technology that combinestechnological excellence and craftsmanship. Discover the case study and associated videos> 
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1 Information processing device used for the numerical control of machine tools.
/cloudfront-us-east-1.images.arcpublishing.com/dmn/6PWE2P5IDNCNHCFW7SC7YKO4OE "Three things the defense should improve for next season")
