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Engineering Materials (Fall 2011) |
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| Course code : | ME-MTR-U1 | ||
| ECTS Credits : | 5 | Status : | Compulsory |
| Revised : | 13/07 2009 | Written : | 26/08 2008 |
| Placement : | 1. semester | Hours per week : | 4 |
| Length : | 1 semester | Teaching Language : | English |
| Objective : | To obtain an understanding of the connection between the function of structures, their geometrical shape and the choice of material. The course also treats some basic concepts of mechanics of materials and the participants will learn to analyze stiffness, strength and toughness of simple structures and their subcomponents, including the influence of material properties. Exercises include deriving material performance indices for some standard structural elements. Furthermore, the students are introduced to a systematic procedure for selecting materials and processes that best match the requirements of a design. A student who has met the objectives of the course will be able to: • Identify the main classes of materials and recognize crystal types, unit cells and crystal lattices in metals and simple ceramics. • Distinguish between elastic and plastic behaviour of metals, ceramics and polymers. • Identify and classify deformation and strengthening mechanisms and processes in materials. • Determine stress and strain in simple, linear elastic design elements, and explain the mechanics of fracture, plastic yielding and buckling. • Derive and use material indices for some standard structural elements. • Explain the physics of friction, wear and fatigue. • Explain simple diffusion processes and creep mechanisms. • Describe the mechanisms of oxidation, corrosion and degradation. • Propose appropriate materials for everyday products based on materials properties and materials manufacturing processes. • Analyze failure of engineering materials. • Use the software “Cambridge Engineering Selector” for interactive material selection. |
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| Principal Content : | The course will cover the following topics: Physical properties, mechanical characteristics, thermal behaviour, durability and environmental issues. The following material groups will be treated: Metals, ceramics, polymers and composites. The physical concepts of forces and moments, stresses, deformations and strains, elasticity and plastic deformation will be introduced. These concepts will be related to the geometry and loading of structural components and also to material composition, i.e. chemical structure, atomic bonding, crystal and phase structures as well as microstructures for composites and porous materials. The interplay between structural properties under load, material parameters and geometry is illustrated by simple examples of uniaxial tension/compression, bending, torsion and buckling. The software “Cambridge Engineering Selector” (CES EduPack) is used for interactive material selection. The knowledge obtained during the course is used in two laboratory exercises, where the microstructure and mechanical properties of a specimen are analyzed. |
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| Teaching method : | The teaching is based on a “design-led approach”. There will be summing up lectures as well as an introduction to material selection in mechanical design. Project work in small groups includes computer simulations, use of internet search engines and case studies. | ||
| Required prequisites : | - | ||
| Recommended prerequisites : | - | ||
| Relations : | Projects 1-4, Industrial Design, Sustainable Product Design, Applied Mechanics 1 and Design for Manufacture. | ||
| Type of examination : | Look under remarks | ||
| External examiner : | External | ||
| Marking : | 7 step scale | ||
| Remarks : | Oral examination based on a number of design projects. The final evaluation of each student will be based on an assessment of the presentation of design projects and the group report. This course is primarily for students enrolled in the program “Engineering Design & Industrial Innovation”, offered by the Department of Mechanical Engineering. |
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| Teaching material : | - Materials: Engineering, Science, Processing and Design, ISBN-13: 978-0-7506-8391-3, by Michael Ashby, Dr Hugh Shercliff & David Cebon. - Lecture notes on CampusNet. |
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| Responsible teacher : | Imad Abou-Hayt
, iabo@dtu.dk |
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