Non-linear numerical modeling, widely used in research and development to understand many complex processes such as forming or machining, does not guarantee the success of a study to be performed. Indeed, the numerical simulation uses finite element codes where the models already integrated are not based on shapes adjustable to any type of study. I...
Real-time management of hydraulic systems composed of multi-reservoir involves conflicting objectives. Its representation requires complex variables to consider all the systems dynamics. Interfacing simulation model with optimization algorithm permits to integrate flow routing into reservoir operation decisions and consists in solving separately hy...
This work deals with the simulation of complex manipulation tasks in virtual environments. Validating such complex tasks, possibly to be performed under strong geometric constraints, requires considering task and path planning jointly. The contribution of this work focuses on using task-related information at the path planning level. We propose an ...
Des préoccupations environnementales et la réduction des coûts de liquides de lubrification utilisés en usinage ont conduit à l’accroissement de l’intérêt industriel dans le remplacement de ces liquides avec des liquides cryogéniques écologiques comme l'azote liquide (LN2). Cependant, la recherche en usinage dans des conditions cryogéniques (aussi ...
The Selective Laser Melting (SLM) process has been progressively endorsed as an industrial manufacturing technique to produce high value-added components. However, one of the main obstacles to its wide application is the uncertainty regard- ing the successful completion of the manufacturing process. Mechanical stresses are generated and accumulated...
This work deals with the customer-supplier relationship and concerns offer definition in Engineer-To-Order situations (ETO), by adopting the supplier point of view. In such cases, when the offer definition relies simply on key design choices without a detailed design, there is a specific risk (ETO-specific risk) that customer expectations cannot be...
L'équipe de recherche informatique de notre université travaille en modélisation et en simulation afin d'étudier de manière holistique les systèmes naturels complexes.Dans ce travail, nous nous sommes fixés comme objectif d'utiliser la simulation informatique comme éprouvette virtuelle afin de concevoir un outil d'aide à la décision dans un context...
Les systèmes physiques sont par nature hétérogènes et multi-échelle. Cette présentation a pour but de montrer une méthodologie de modélisation générique basée sur les échanges de puissance qui s'applique sur grand nombre de systèmes physiques et surtout multi-physiques. Cette modélisation s'applique pour les systèmes d'échelles physiques et tempore...
In order to face an increasing economic competition, industrial manufacturers wish to reduce the time and cost of product development. Furthermore, up-to-date products are more and more integrated, and must be assembled, disassembled or maintained under potentially very strong geometric constraints. In the context of Industry 4.0, manufacturers are...
When modelling a cutting operation, the constitutive model of the machined material is one of the key parameters to obtain accurate and realistic results. Up to now, the Johnson-Cook model is still the most used, even if an increasing number of models, such as the Hyperbolic TANgent (TANH) model, were introduced last years to overcome its limitatio...
