tailieunhanh - Automotive design and the role of the chemist: Part 2

Continued part 1, Automotive design and the role of the chemist: Part 2 present the content such as: engineering polymers, high-temperature and -pressure applications, and structural polymers, automotive requirements, materials and processing; power train applications, some important additives, transmission fluid types; seal and gasket design, thermal serviceability range, Fluoropolymer elastomers; Hvac system overview and refrigerant design, refrigerant performance and some key definitions, new developments in refrigerant design; fuel-cell chemistry overview, fuel cells as automotive propulsion; membranes and Hydrogen storage devices ; developing technology, battery developments. | 6 Engineering Polymers High-Temperature and -Pressure Applications and Structural Polymers INTRODUCTION Engineering polymers for high-temperature and -pressure applications are in use extensively in original equipment manufacturers around the world. The high-strength properties of these materials are necessary to obtain the desired mass reductions efficiency cost and performance required in today s market. In current automotive applications several polymers predominate for thermoplastic seals thrust washers intake manifolds and other components. Several factors must be considered in seal design for rotating pressurized applications versus static sealing. Among these are processing factors such as injection or compression molding physical properties such as tensile and yield strength thermal properties friction coefficient and wear resistance. Rigid structural components such as fascias grills headlamps and body panels have somewhat different requirements than the other components discussed in this book. We will discuss them in brief detail here. DYNAMIC SEALING As the automotive industry attempts to improve vehicle performance by reducing noise and vibration decreasing weight and increasing fuel performance every aspect of design is considered. One would think that such a simple thing as a 10-g seal would not be worthy of scrutiny now that mass savings imperatives are measured in grams. Historically cast iron seals were used in internal high-wear high-temperature applications 1 . NEEDED PROPERTIES An automotive seal for instance must be efficient that is it must have the ability to expand against a sealing surface quickly. This efficiency is related to the elastic modulus of the material which is related to its stiffness 1 . The elastic modulus is the ratio of stress to corresponding strain in a material below the proportional limit on a 81 82 The Role of the Chemist in Automotive Design Rotating housing Hydraulic fluid path Support FIGURE Diagram .

• Cơ khí - Chế tạo máy
• The role of the chemist in automotive design
• The chemist in automotive design
• Automotive design
• Developing technology
• Seal and gasket design
• Power train applications
• Engineering polymers
• Automobile industry
• Automobile plant environmen
• Component materials in automobiles
• Design Concerns and Imperatives
• Engineering materials 2
• The structure of polymers
• Mechanical behaviour of polymers
• Design with materials
• Case studies in design
• Joining of polymers
• Nuclear engineering and technology
• Gamma ray and neutron attenuation properties of some polymers
• The gamma ray attenuation characteristics
• Transmission geometry utilizing the high resolution HPGe detector
• The effective atomic number of PVDC and PTFE
• Handbook of mechanical engineering
• mechanical engineering
• mechanical design
• mechanical materials
• alloy materials
• Energy Technology
• Carbohydrate polymers
• Microbial polysaccharide hydrogel
• Tissue engineering and regenerative medicine
• Material blending
• Cell proliferation
• Master's thesis of Engineering
• Master's thesis
• Dyes and dyeing Chemistry
• Preparation of Clay dye pigment
• Cationic exchange capacity
• Energy Dispersive Spectroscopy
• Defining Polymers
• Polymer Properties
• Emulsion Polymerization
• Chemical Structure
• Growth Polymerization
• biodegradable polymers
• magnetic nanomaterials
• coronary stents
• contact lenses
• Medical Plant
• Human Health
• Device Passivation
• Engineering Applications
• Crystal Devices
• Humidity Measurements
• Advanced Technologies
• Sensor Applications
• Technologies
• Systems Engineering
• robotic
• mechanical
• anatomy
• Pharmaceutical Applications
• Plasticized Polymers
• Selective Electrodes
• Electrochemical Sensors
• Cellulose Acetate
• Health Risk Assessment
• cơ khí chế tạo máy
• tài liệu cơ khí
• sổ tay cơ khí
• hướng dẫn cơ khí
• ôn thi cơ khí
• Polyglucuronic acid
• Horseradish peroxidase
• Tissue engineering
• 3D bioprinting
• Polymer engineering
• chemistry
• physics
• macromolecular chemistry
• Polymer characterization
• Polymer Science
• Hybrid Polymers
• Disulfide crosslinked hydrogels
• Hyaluronic acid
• Bacterial cellulose
• Silk fibroin
• Biocompatible materials
• Elasticity
• Plasticity and failure
• Notches
• Fracture mechanics
• Mechanical behaviour
• polymers
• Supramolecular chemistry
• Crystal engineering
• Network solids
• Supramolecular catalysis
• Liquid assemblies
• Supramolecular polymers