Saint-Ouen, France
Saint-Ouen, France

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Ayadi M.,LISMMA SUPMECA | Ayadi M.,University of Sfax | Costa Affonso R.,LISMMA SUPMECA | Cheutet V.,LISMMA SUPMECA | And 3 more authors.
International Journal of Simulation Modelling | Year: 2013

Digital Factory (DF) aims at proposing simulation tools to design a product and its production system in parallel. Nevertheless, DF is marked by the multiplicity and heterogeneity of simulation models that are used, that slows down its usage in industry. We propose in this paper a conceptual model to manage the different simulation information created and manipulated through a DF project. This model is based on an analysis of the current design strategies and the used simulation tools. Finally, an industrial application has been developed to validate the completeness of this model.

Affonso R.C.,LISMMA SUPMECA | Liu Y.,French National Center for Scientific Research | Zolghadri M.,LISMMA SUPMECA
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2013

With the increase of worldwide industrial competition, companies must propose new products in a short lead time in order to answer the requirements of demanding clients. Nevertheless, innovation concerning new products is no longer enough to guarantee strategic market advantages. The product supply chain performance is an important and additional factor to achieve these market advantages. In this context, it is essential for companies to integrate product and supply chain design in order to find proper product solutions considering impacts in supply chain performance. This paper proposes a framework of activities that integrates these two aspects of design phase. © IFAC.

Fortes Da Cruz J.,LISMMA SUPMECA | Lemaire-Caron I.,LISMMA SUPMECA | Da Silva Botelho T.,LISMMA SUPMECA | Durand A.-M.,ACM | Inglebert G.,LISMMA SUPMECA
Mechanics and Industry | Year: 2015

Experimental approaches to study fretting are heavily dependent on the performances of the test devices, especially considering the extensive use of quantitative parameters extracted from fretting loops. The dynamic response of a newly designed high temperature test bench is analysed to define the practical test range and identify dynamic disturbance sources. Displacement and load metrology are studied, leading to a direct comparison of two tangential load measurement methods. Accounting for the inertia loads and the elastic properties of the guiding system allows to increase the frequency operating range of the test bench. © AFM, EDP Sciences 2015.

Festjens H.,LISMMA SUPMECA | Gael C.,LISMMA SUPMECA | Franck R.,LISMMA SUPMECA | Jean-Luc D.,LISMMA SUPMECA | Remy L.,Robert Bosch GmbH
Applied Acoustics | Year: 2012

The purpose of this publication is to give an overview of the actual role of multi-layered viscoelastic parts, so called "shims", to prevent squeal noises of automotive brake systems. Since shear stress is usually used to damp thin structures in their bending modes it is commonly believed to be the largest underwent by shims. To check this assumption and considering that stresses underwent by shims cannot be measured experimentally, the authors have computed them with the help of a detailed and realistic finite element model. Contrary to what shims manufacturers say, this study exhibits the fact that shims are almost uniquely solicited in their normal direction in brake systems. Secondly, the study focuses on the added damping and stiffening induced by the viscoelastic materials. In order to take into account these materials, a realistic frequency dependent viscoelastic behavior has been integrated in the simulations. Finally, the study shows certains eigenmodes for which the viscoelastic behavior of the shims reveals instabilities that would not exist without it. It is shown that this is due to coalescence phenomenon. © 2012 Elsevier Ltd. All rights reserved.

Journal of Sound and Vibration | Year: 2014

Assembled structures generally show weak nonlinearity, thus it is rather commonplace to assume that their modes are both linear and uncoupled. At small to modest amplitude, the linearity assumption remains correct in terms of stiffness but, on the contrary, the dissipation in joints is strongly amplitude-dependent. Besides, the modes of any large structure may be LOCALLY collinear in the localized region of a joint. As a result the projection of the structure on normal modes is not appropriate since the corresponding generalized coordinates may be strongly coupled. Instead of using this global basis, the present paper deals with the use of a local basis to reduce the size of the problem without losing the nonlinear physics. Under an appropriate set of assumptions, the method keeps the dynamic properties of joints, even for large amplitude, which include coupling effects, nonlinear damping and softening effects. The formulation enables us to take into account FE models of any realistic geometry. It also gives a straightforward process for experimental identification. The formulation is detailed and investigated on a jointed structure. © 2013 Elsevier Ltd.

Zerelli M.,LISMMA Supmeca | Soriano T.,LISMMA Supmeca
2012 9th France-Japan and 7th Europe-Asia Congress on Mechatronics, MECATRONICS 2012 / 13th International Workshop on Research and Education in Mechatronics, REM 2012 | Year: 2012

Dynamic systems are often modeled by differential equations. A good way to model uncertainty of components is to use differential inclusions. Parameters' variation may be small or large in depends on the nature of problem if it is tolerancing problem or sizing one. Our researches are based both on works of Raczyński on differential inclusion used as a simulation tool and Aubin who introduced impulse differential inclusion as a framework to model hybrid system. We have developed an algorithm to get different sets defined by Aubin. We proceed on an application of an impulse differential inclusion of a mechatronic system modeled by a hybrid automaton. © 2012 IEEE.

Garcia J.,PSA Peugeot Citroën | Millet D.,LISMMA Supmeca | Tonnelier P.,PSA Peugeot Citroën
ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis, ESDA 2012 | Year: 2012

This paper lies within the integration of an eco-design method adapted to the Innovation structure at a car manufacturer. The environmental constraints in the automotive industry are more and more important (European emission standards for exhaust emissions, European directive on end-of life vehicles⋯). Eco-design is a new manner to design products related to the concept of sustainable development, which combines economy and ecology and put the environmental criterion alongside the classical criterions of design. The goal of this study is to identify the specifications of a strategy for integrating the dimension "Environment". This strategy is applied in the innovation process thanks to eco-design tools which are the learning vectors for an organization, and therefore support a learning process. This process is structured with the interactions between the management of firm, the environment department, and the design team. Therefore we first make a synthesis of the different classifications of eco-design tools and use two categories: diagnosis and improvement. Second, as our goal is the integration in the Innovation structure and within a design process, we analyze some design process models and highlight the RID (Research, Innovation structure, Development) concept. Third, the main practices of several car makers are synthetized and a focus on three of them (Volvo, Ford, and Volkswagen) is made; we link their strategies with the concept of RID. Finally in the fourth part, we propose a model of a strategy for integrating eco-design practices based on the three examples and supported by a learning process. Copyright © 2012 by ASME.

Festjens H.,Lismma Supmeca | Chevallier G.,Lismma Supmeca | Dion J.-L.,Lismma Supmeca
International Journal of Mechanical Sciences | Year: 2013

Mechanical joints in assembled structures cause energy dissipation due to micro-slip in contact and softening effects that play an important role in the dynamic behavior of such structures. The contact non-linearity is governed by micro and meso-scale parameters (geometry, roughness, local pressure, etc.) and as a result cannot be included in a macro-size model of a whole structure because of the computational cost. The present paper investigates the idea of using the normal modes of the linearized structure as boundary conditions on a detailed model reduced to the joints only. Since contact non-linearities alter mode shapes, they are corrected as vibrational energy increases. The method relies on a corrected quasi-static formulation associated with the Masing hypothesis. These assumptions circumvent considerable numerical expense due to the non-linear dynamics. The formulation of the method is detailed and investigated on a lap-joint benchmark. © 2013 Elsevier Ltd.

Advanced Engineering Informatics | Year: 2014

Mechatronic systems are characterized by the synergic interaction between their components from different technological domains. These interactions enable the system to achieve more functionalities than the sum of the functionalities of its components considered independently. Traditional design approaches are no longer adequate and there is a need for new synergic and multidisciplinary design approaches with close cooperation between specialists from different disciplines. SysML is a general purpose multi-view language for systems modeling and is identified as a support to this work. In this paper, a SysML-based methodology is proposed. This methodology consists of two phases: a black box analysis with an external point of view that provides a comprehensive and consistent set requirements, and a white box analysis that progressively leads to the internal architecture and behavior of the system. © 2014 Elsevier Ltd. All rights reserved.

Miraoui I.,Al Jouf University | Miraoui I.,Gafsa University | Elimi E.,Gafsa University | Boujelbene M.,LISMMA Supmeca | Bayraktar E.,LISMMA Supmeca
Advanced Science Letters | Year: 2013

Laser cutting is well known as the reference among other cutting technologies. It's a complex process involving parameters such as laser energy and cutting speed. The objective of this work is to study the effects of laser cutting on the microstructure characteristics and on the roughness of the cut section. The laser cutting of stainless steel material is investigated with the aim of evaluating the effect of the main input laser cutting parameters (laser power and cutting speed) on laser cutting quality: cut surface roughness and microstructure characteristics. An overall optimization was applied to find out the optimal cutting setting that would improve the quality of laser cutting. There exist an optimum combination of cutting speed and the laser power which gives the maximum quality. © 2013 American Scientific Publishers.All rights reserved.

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