Mechanical Engineering & Design
The main topics focus on the design process, taking into account all the life phases of a product. Methods and tools are developed to help the decision making.
Department presentation and research
The research activities of the IMC department aim to:
- reduce decision-making risks in design,
- optimize the choices in preliminary design,
- develop robust design approaches.
The activities carried range from fundamental approaches to the tool or from the innovative idea to the pre-industrial solution. It is necessary to develop methods, tools, models or data to carry out the design and makes the balance for the multiple objectives.
We claim to work from the preliminary design stages with indicators and evaluations of the developed systems, in order to ease decision-making. The research topics of the department IMC address the fields of:
- the design of products and systems over all the phases of its life, assistance in the selection between different technical and economic alternatives, and the development of multi-criteria and multi-objective optimization tools and methods
- the encapsulation of knowledge (domain expertise, environmental dimensions, satisfactions, etc.) in the product development process, the interaction between decision makers and digital environments supporting product development,
- the integration between design and manufacturing for product performances assessment (under real operational conditions) by geometric tolerancing and / or product behaviors (performance) - materials (behavior and defects) - processes
- the design of architectured materials or composite structures, their assembly, the discussion between multi-scale experimentation and simulation
The department's areas of expertise are:
- innovation,
- energetic and thermal systems,
- medical articular devices,
- composite and multi-material structures, hybrid assemblies,
- tolerancing and functional specifications,
- ecodesign and circular economy.
GT3 : Behaviour analysis for the design of composite structures and achitectured material
Referees :
Christophe Bois et Hervé Wargnier
Members :
Christophe Bois,Jalal El Yagoubi, Claire Guillebaud, Pierre Joyot, François-Xavier Kromm, Thierry Lorriot, Marco Montemurro, Nicolas Perry, Jean-Christophe Wahl, Hervé Wargnier
The design and optimization of structures aimed at reducing costs with a guaranty to the performances. This compromise is notably achievable by using composite materials and more generally of architectural materials. The multi-material plays a predominant role on the performance of the structure.
The first research axe consists of analyzing and understanding the behavior and degradation modes of composite materials in order to adapt and exploit predictive models according to the design requirements of the structures. It is necessary to observe and characterize at the different scales of the material, this is coupled with behavioral models proposal in order to identify the physical phenomena and the parameters governing the performance of the structure studied. The selected models must take into account the variability on the geometry and the material induced by the production processes.
The second axe consists of designing architectural materials that meet very specific specifications with multifunctional and often multi-physical requirements. Their behaviors result from the coupling of numerous parameters (properties and volume fractions of constituents, architecture, interfaces ...). To design an architectural material based on functional requirements, we develop methods for selecting and optimizing these parameters. Various industrial applications allow us to enrich and validate the proposed procedures.
The aim of this research is the development of methodologies and tools for physical and mechanical characterization, as well as modeling with complexity controlled and adapted to the industrial objective (pre-dimensioning, validation, certification, optimization of physical performances or industrial).
Today, this working group includes 3 main research activities:
- Study of the behavior and design of assemblies of composite and multi-material structures. Load transfers in contact areas and interfaces, behavior and degradation of parts in assembly zones, influence of geometric variabilities and materials, propagation of uncertainties and tolerancing (link with working group 1 of the IMC Department),
- Study of the behavior of composite tanks. Wound and thick composite structures, integration of micro- and meso-scale variability induced by the process, scaling, coupling damage permeability,
- Design of architectural materials: Selection of materials, definition and optimization of architectures, incompatibility of functional requirements, multi-physical problems, role of interfaces.
Crack network observation using microtomography under loading in a CFRP laminate (PhD thesis H. Laeuffer)
Contact
Jérome Pailhes
Responsable du Dpt
ENSAM
Esplanade des Arts et Métiers
33405 Talence Cedex
Denis Teissandier
Responsable Adjoint
ENSAM
Esplanade des Arts et Métiers
33405 Talence Cedex
