Academic literature on the topic 'Carrosserie automobile – Conception assistée par ordinateur'
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Dissertations / Theses on the topic "Carrosserie automobile – Conception assistée par ordinateur":
Beck, Léon. "Modélisation et caractérisation de l'endommagement jusqu'à la rupture de l'assemblage structurel soudé par points." Electronic Thesis or Diss., Reims, 2023. http://www.theses.fr/2023REIMS053.
In the automotive industry, the demand for complex and innovative products by customers is growing, which presents development challenges. Simulation allows testing of vehicle structures and components before physical construction, saving time and resources. This innovation allows the automotive industry to advance rapidly and push its boundaries. Mercedes-Benz is a leader in designing durable vehicles. An important part of car design involves digitally modelling the connections between metal sheets in the body structure, which is mainly done through spot welds. The number of spot welds varies from 3000 to more than 5000. Precise spot welds modelling allows accurate sizing of the sheets and spot welds in the early stages, resulting in time and cost savings in a vehicle’s design phase.The latest technical innovations in the simulation and assembly of sheet metal consider various thicknesses and types of materials. Up to day, the company's current model does not include such improvements in the evaluation of spot weld strength. The objective of the present work is, therefore, to develop a better model. The goal is to simulate the robustness of spot welds assemblies, while ascertaining their capacity to endure stresses and calculating failure.A first study has been carried out to explore the various spot weld models used in industry. Numerous models can be classified according to their geometric representations, in particular circular, square and linear models. Each of those representations has its own advantages and disadvantages. The models based on a circular representation stand out when it comes to very precise models. However, their complex representation makes them difficult to integrate into a body-in-white. The two other representations particularly caught our attention: one using hexahedral elements with a specific material map and, respectively, one using bar-type elements with a dedicated search zone for simple integration into the assembly. These two representations present advantages and disadvantages, particularly in terms of independence from the mesh and mechanical behaviour.The idea of this work is to merge the advantages from both these representations A cohesive type element with a hexahedral shape based on the use of 3D Timoshenko beam type formulation defining the height of the weld zone. The developments were carried out on ABAQUS. This method allowed us to obtain an elastic model of our structure to be built up from the four edges, as well as a function for measuring the failure of the spot weld.To calibrate this new element, several test cases have been identified and simulated, including KSII, shear and peel tests. These series of tests aimed to verify the adaptation of the element to configurations of materials and thicknesses. Further simulations with varying mesh sizes set in evidence a phenomenon of mesh dependency, as in the models previously analysed. Therefore, a solution has been developed to include a zone of shell elements around our new element, which reduces the influence of the mesh.This latter process allowed us to calculate our hybrid element on different body-in-whites to validate our model on complex structures. The conducted simulations provided a good representation of reality. Differences are still noticeable in places, which can be explained by the fact that the material map developed with the hybrid model has not been calibrated for all possible combinations.This research represents a notable step forward in spot weld modelling, with promising results for a further application in [the company’s model?]. The creation of a hybrid model that can adapt to different mesh sizes and controls all degrees of freedom is a substantial achievement. Nonetheless, the precision and robustness of spot weld behaviour modelling may be further enhanced for considering an industrial application
Goualou, Christian. "Elaboration d'un outil de préconception du système de retenue d'une automobile en choc frontal." Châtenay-Malabry, Ecole centrale de Paris, 1995. http://www.theses.fr/1995ECAP0447.
Bourdon, Adeline. "Modélisation dynamique globale des boîtes de vitesses automobile." Lyon, INSA, 1997. http://theses.insa-lyon.fr/publication/1997ISAL0084/these.pdf.
The aim of this project, was to develop global numerical dynamic models of automobile gearboxes. These models can be used by the Design Office in CAD environment in the vicinity of reducing noise, and of defining dynamic transmission conditions. These analysis follows the principle of Finite Element Method. "Structural" elements are discretized using standard finite elements, and linkage element behaviors are linearized around static working point. This static point is defined by numerical procedures which take into account bearing non-linear behavior. Special numerical elements have been set up to modelize gears and bearings dynamic behavior. These global dynamic models make it possible to determine eigenmodes and dynamic responses of the whole gearbox. Numerical tools and criteria are defined to evaluate influence of technological components on the global dynamic behavior. First studies are realized on an automobile gearbox kinematic chain. They highlight the bearing influence on the global behavior, and how important it is to model them accurately. Importance of static environment is also shown. In a second step, housing dynamic "deformability" is taken into account and dynamic couplings between housing and kinematic chain deformations are evaluated. At the end of these works, which have been validated by experimental studies, global dynamic behavior of automobile gearboxes could be provided and technological choice consequences could be evaluated
Martin, Pierre. "Modèle pour la conception immersive et intuitive : application à l’industrie automobile." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112144/document.
This thesis addresses the use of Virtual Reality (VR) technologies in the activities of Computer-Aided Design (CAD). More precisely, this research focuses on an approach for direct and interactive modifications of CAD objects, an approach which might be adapted to the conception process in industry. Usually, CAD software requires some skills (experience and knowledge), on the software’s functionalities and representations, as well as on CAD objects (principally on their design history, on the way they were built). Moreover, VR technologies bring new interactive paradigms of 3D interaction, such as immersion and multi-sensorimotor perception stereoscopy, 3D audio, haptics, and so on), and one needs intelligent middleware to manage CAD objects in these immersive Virtual Environments (VE). Some previous work proposed a mechanism allowing implicit edition of CAD objects, from the manipulation of their 3D visual representations. Based on a technique of Boundary Representations (B-Rep) elements labelling, and coupled with an inference engine, this mechanism describes a backward chaining of B-Rep elements towards the operators of a dedicated model of Constructive History Graphs (CHG). However, this approach had a major limitation: since it was based on a specific model of CHG, its integration within commercial CAD softwares used in industry (and especially in automotive industry) was far from obvious. Our first contribution is then to propose a data model and an architecture to generalize this backward chaining mechanism to any of CAD system based on B-Rep and CHG representations. In order to do that, we have designed several encapsulations structures, to manage CHG operators and their parameters, and the B-Rep components. Secondly, the previous labelling, now attached to these structures, has been extended to enable a multi backward chaining. Actually, some B-Rep elements may be the result of several CHG operators, and thus, several decisions may be inferred from their manipulation. These improvements make possible to have direct and interactive modifications of existing CAD objects by parsing their CHG to fill our structures with useful data. Moreover, the multi backward chaining mechanism reinforces the ability of the inference engine to free users, especially non-expert ones, from too complex understandings on CAD models. As a proof of concept of our model, we present an detailed example of our approach on the geometric kernel of CATIA and we show how one can consider new concepts of interaction during immersive project reviews: to allow participants to directly modify CAD objects without any interaction on desktop workstation
Khoudeir, Riad. "L'amélioration de l'habitabilité automobile de demain : l'application des principes de la construction architecturale de la maison dans la conception de l'habitacle des concepts-cars." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL004N/document.
The research field of this work is Industrial Engineering. This paper presents a study made to improve tomorrow’s automobile cabin habitability. It is focused on showing the influence on car-interior design by today’s home-interior design. The objective of this work is to propose a tool intended to help automobile designers to introduce home architectural construction principles into the car’s cabin design to improve its habitability. In our experimental phase we adopted principles of the method of analysis of the joint tendencies such as mappings and boards of categorization. This step showed that car designers have been increasingly using the home architectural construction principles on the car’s cabin conception design. Our research took into account the opinion of experts in both areas: architecture and design. In this way, we can be certain that the home and the automobile share the same criteria of habitability. We could also confirm that home architectural principles have a positive impact on the improvement of the habitability criteria in space design of the automobile’s cabin. This work opens a research line to analyze the influence of different areas in automobile design, such as aeronautics and electronics. This study can also show the inverse perspective of how car design can eventually have an impact on the future home design
Chamaret, Damien. "Plate-forme de réalité virtuelle pour l'étude de l'accessibilité et de l'extraction de lampes sur prototype virtuel automobile." Phd thesis, Université d'Angers, 2010. http://tel.archives-ouvertes.fr/tel-00540899.
Doulcier, Joseph. "Implantation optimale d'un robot en fonction d'une tâche à réaliser en environnement contraint. Analyse, synthèse et développement d'un module d'aide à l'implantation des robots." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1993. http://tel.archives-ouvertes.fr/tel-00523120.
Books on the topic "Carrosserie automobile – Conception assistée par ordinateur":
Wentland, Kenneth. Ford flexes back: Changing the U.S. auto industry from deep within the trenches. New York: Strategic Book Pub., 2008.