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Mechanics & Materials I (Fall 2011) |
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| Course code : | ME-MEM1-U1 | ||
| ECTS Credits : | 10 | Status : | Compulsory |
| Revised : | 25/08 2011 | Written : | 25/08 2011 |
| Placement : | 1. semester | Hours per week : | 8 |
| Length : | 1 semester | Teaching Language : | English |
| Objective : | To introduce the students to the basic concepts and methods of engineering materials and strength of materials, and to give them an understanding of the link between the study of mechanics and materials in structural design. To provide the students with 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. The course treats the fundamentals of engineering materials and mechanics of materials and the students will learn to analyse stiffness and strength of simple structures and their sub-components, including the influence of material properties. To provide a firm foundation for later study of Finite Element Methods (FEM). 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 behavior 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. • Use statics and free body diagrams to determine reactions and internal forces. • Determine stress and strain in simple, linear elastic design elements. • Understand the link between material properties and mechanics of materials. • Design and analyze axial, torsion and flexural structures as well as structures for combined loading. • Sketch the shear and bending moment diagrams for various loads on beams. • Design and analyse slender compressive structures (columns). • Apply energy methods to determine stresses and deformations in simple structures. • Use computer software, currently SolidWorks, for the solution and the graphical illustration of structural design problems. • Read engineering literature on mechanics of materials. |
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| Principal Content : | The course will cover the following topics: Physical properties, mechanical characteristics, thermal behavior, durability, environmental issues, Statics. Analysis of stress and strain. Mechanics and materials. Axial, torsion and flexural loadings. Pressure vessels. Stresses in beams and beam deflections. Design of column structures against buckling. Energy methods. Theories of failure. 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 software “Cambridge Engineering Selector” (CES EduPack) is used for interactive material selection. |
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| Teaching method : | The teaching is based on a “design-led approach”. Approximately half of the time allocated to the course will be used in guided project work in groups. The course projects will give the students an opportunity to apply basic concepts learned in the class to real-life problems, and to learn new concepts in that are not covered in the lectures. There will be introductory and 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. |
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| Required prequisites : | None | ||
| Recommended prerequisites : | None | ||
| Relations : | The course is fundamental to the whole study program in mechanical engineering. | ||
| Type of examination : | Look under remarks | ||
| External examiner : | External | ||
| Marking : | 7 step scale | ||
| Remarks : | The evaluation of each student will be based on a four-hour written exam, worth 50% of the final grade, and on a number of project assignments throughout the semester. A final group report containing the assignments should be submitted at the end of the semester. The group report is worth 50% of the final grade. This course is an integrated part of the study program “Engineering Design & Industrial Innovation” offered by the Department of Mechanical Engineering. It is primarily for students enrolled in the program. |
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| Teaching material : | - Materials: Engineering, Science, Processing and Design, ISBN-13: 978-0-7506-8391-3, by Michael Ashby, Hugh Shercliff & David Cebon. Published by Elsevier Ltd. - Statics and Mechanics of materials, SI Edition, by R. C. Hibbeler, ISBN-10: 981-0-68632-3, Pearson. - Lecture notes on CampusNet. |
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| Responsible teacher : | Imad Abou-Hayt
, iabo@dtu.dk |
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