Cours - Génie mécanique

This document provides detailed specifications and guidelines for selecting KMT series non-standard three-phase asynchronous motors. Covered are their construction features, application areas, and dimensions, with speed options of 3000, 1500, and 1000 rpm. The methodology described emphasizes precise selection criteria including shaft diameter, bride type and dimensions, and power ratings. The motors comply with IEC 34-1 standards and offer enhanced adaptability for replacement scenarios.

This document focuses on additional exercises for calculating mechanical structures, specifically dimensioning and examining forces on a transmission shaft. Exercises include determining torque equilibria and internal forces through cinematic diagrams involving ball bearings, needle bearings, and geared rotational systems. It uses schematic representations to model mechanical actions at specific points, leveraging theoretical frictionless simplifications for calculations.

This document presents the internship experience of Mohamed Houssem CHORTANI at STAFIM Peugeot, focusing on various mechanical systems and processes in vehicle maintenance and repair. It outlines the history, function, and components of Peugeot in Tunisia, along with detailed descriptions of engine types, braking systems, clutches, and suspensions. The report concludes with an appreciation for the team at STAFIM for their guidance during the internship.

This document explores the mechanics behind transmission systems and gearboxes. It defines different types of vehicle transmission: front-wheel drive, rear-wheel drive, and all-wheel drive, emphasizing their functional differences and mechanics. It details the components of a transmission system, including the clutch and gearbox, explaining their roles in power transfer and the adaptation of torque to driving conditions. Additionally, it covers gearbox types, their internal structures (primary, secondary, and intermediate shafts), and their classifications based on technology, synchronizati...

This document explores the design and optimization of a heat exchanger within a hybrid renewable energy system combining wind energy, diesel generation, and compressed air storage. It systematically evaluates multiple system configurations for heat storage and exchange, considering thermal efficiencies, system costs, and environmental impacts. Phase change materials (PCMs) and their performance are investigated to achieve optimal thermal storage. A final configuration is selected using detailed decision matrices and material comparisons to ensure practicality and energy sustainability.

This document focuses on presenting the LEONI industrial group's activities, specifically analyzing the LEONI Mateur Nord site in Tunisia. It discusses the production of electrical harnesses for the automotive industry, while detailing the organizational and operational structure of the site. The study highlights a problem related to the inefficiency of the wire feeding system (dérouleur) and proposes an improved mechanism utilizing a guided bucket for automatic elevation and rotation of reels. The improvement aims to minimize worker fatigue, reduce time loss, and enhance production efficie...

This document explores the thermal modeling during the glass thermoforming process. It identifies key challenges, such as non-homogeneous thickness, mold surface defects, and structural breaches due to the coupling of thermal and mechanical properties. A numerical resolution code was developed using Monte Carlo methods, validating strong and weak thermal-mechanical coupling approaches. Results show minimal discrepancies in precision between coupling methods and suggest balancing computational cost and accuracy through optimized quanta allocation.

The document introduces fluid mechanics concepts, detailing the properties and behaviors of fluids, specifically distinguishing between liquids and gases. It delves into the continuous medium theory, emphasizing the role of variables such as density, velocity, pressure, and temperature. Various equations are provided to describe compressibility, viscosity, and hydrostatics, including applications like Pascal's theorem and pressure determination in fluids. Advanced concepts such as force of pressure on surfaces and the center of pressure are addressed with supportive calculations and examples.

Ce document fournit une analyse complète des propriétés, des utilisations et des recommandations d'impression pour divers matériaux destinés à l'impression 3D. Chaque matériau est décrit en fonction de sa facilité d'utilisation, de sa solidité, de sa résistance thermique, et de sa compatibilité avec des applications spécifiques (intérieur/extérieur, décoratif, mécanique, etc.). Des instructions spécifiques pour l'impression et les ajustements techniques, tels que l’utilisation de buses spécifiques et les températures optimales, sont incluses. Enfin, les points de vigilance, telles que la se...

This document elaborates on the main features and methodologies to control actuators, including linear motors, MCA (asynchronous motors), variable speed drives, and pneumatic cylinders using PLCs. It provides step-by-step circuit designs, operational command tables, and techniques for reversing motor direction or controlling speed. Additionally, it describes various sensor types (analog, logical, and digital) and their applications in automation systems. Specific examples include position sensors, proximity detectors, and temperature measurement through thermocouples and thermo-resistances.

This document thoroughly explores fundamental concepts in kinematics, statics, dynamics, and vector geometry within mechanical systems. Key methodologies include defining trajectories, velocities, and accelerations in various coordinate systems, and analyzing mechanical contacts and forces. The findings highlight the principles of motion derivation, graphical representation techniques for solid systems, and static equilibrium resolution. These mechanics principles are outlined with practical examples and theoretical frameworks to aid understanding.

This document details the fundamental principles of die design and its significance in sheet-metal stamping as a cost-effective and versatile manufacturing process. It explores comparative analysis with other fabrication methods such as casting, forging, and plastic molding, highlighting stamped metal's superior strength, aesthetic flexibility, and practical advantages. Critical aspects include metal grain orientation, edge formation, and structural integrity, emphasizing the importance of proper design by technical experts to minimize faults and enhance manufacturability. Extensive illustr...