Undergraduate Teaching 2019-20

Engineering Tripos Part IA, 1P2: Materials, 2019-20

Engineering Tripos Part IA, 1P2: Materials, 2019-20

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Course Leader

Dr H Shercliff

Lecturer

Dr H Shercliff

Lecturer

Dr A Markaki

Lecturer

Dr T Savin

Timing and Structure

Lent: 8 lectures (1 per week, plus 4 online only); Easter: 8 lectures (2 or 3 per week)

Aims

The aims of the course are to:

  • Introduce the material properties and failure mechanisms most relevant to mechanical design and engineering applications.
  • Relate properties to atomic, molecular and microstructural features, using appropriate mathematical models.
  • Enable analysis of material performance in mechanical design, including strategies for material and process selection

Objectives

As specific objectives, by the end of the course students should be able to:

  • Understand the purposes of modelling the elastic-plastic deformation responses of materials
  • Define the main mechanical properties of materials and how they are measured experimentally
  • Analyse the stress-strain response of simple geometries under uniform mechanical and thermal loads, distinguishing between true and nominal stress and strain
  • Describe the atomic and microstructural characteristics which control the mechanical properties of engineering materials, and to interpret material property charts
  • Explain briefly the origin of the elastic modulus for each class of engineering materials (metals, ceramics, polymers) and analyse the moduli of composites
  • Describe the mechanisms for plastic flow in metals, and the ways in which the strength can be enhanced via composition and processing
  • Understand a systematic strategy for materials selection for a given component, and use the Cambridge Engineering Selector software to find material data and select materials
  • Choose materials from material property charts using simple calculations (e.g. stiffness and strength of beams at minimum weight)
  • Choose primary shaping process from process attribute charts, and estimate the cost of manufacture for batch processing
  • Understand the environmental impact of materials in the life cycle of products
  • Describe the mechanisms of fracture and fatigue in each class of engineering materials
  • Apply fracture mechanics analysis to design against fracture in metals, and Weibull failure statistics for design in ceramics
  • Describe and model fatigue failure in design with metals
  • Analyse the visco-elastic response of polymers, for both static and cyclic loading
  • Briefly describe the mechanisms of friction and wear in engineering

Content

Introduction (1L, Dr H.R. Shercliff)

Classes of engineering materials and their applications; material properties and overview of microstructural length-scales. (1) Chap. 1,2; (2) Chap. 30; (3) Chap. 27

Elastic and Plastic Properties of Materials (1L + 2L online, Dr H.R. Shercliff)

  • Introductory solid mechanics in design and manufacturing: analysis of stress and strain, thermal stress. (1) Chap. 4,12; (2) Chap. 3; (4) Chap. 7
  • Elastic properties - Young's modulus: measurement, data and material property charts. (1) Chap. 4; (2) Chap. 3,7; (4) Chap. 7
  • Plastic properties - Yield strength, tensile strength and ductility: Tensile and hardness testing, measurement of strength, data and material property charts. (1) Chap. 6; (2) Chap. 8,11,12,31; (3) Chap. 4-6; (4) Chap. 7

Microstructural Origin and Manipulation of Material Properties (4L + online "Guided Learning Unit", Dr H.R. Shercliff)

  • Introduction to microstructure and crystallography (online "teach yourself" Guided Learning Unit).  (1) GLU1.
  • Physical basis of elastic modulus and density: atomic/molecular structure and bonding. (1) Chap. 4; (2) Chap. 4-6; (4) Chap. 2-4
  • Microstructual origin and manipulation of elastic properties: foams and composites. (1) Chap. 4; (2) Chap. 6
  • Physical basis of plasticity and yielding: ideal strength, dislocations in metals; failure of polymers. (1) Chap. 6; (2) Chap. 9; (4) Chap. 8
  • Microstructural orgin and manipulating plastic properties: strengthening mechanisms in metals. (1) Chap. 6,19; (2) Chap. 10; (4) Chap. 8,12

Material and Process Selection, and Environmental Impact in Design (2L + 2 online, Dr H.R. Shercliff)

  • Material selection in design; stiffness-limited and strength-limited component design; introduction to Cambridge Engineering Selector software. (1) Chap. 2,3,5,7; (2) Chap. 3,7; (4) Chap. 7
  • Environmental impact and life cycle analysis of materials. (1) Chap. 20
  • Selection of manufacturing process and cost estimation for batch processes. (1) Chap. 18

Fracture and Fatigue of Materials (4L, Dr A.E. Markaki)

  • Toughness, fracture toughness and fatigue fracture.
  • Micromechanisms of brittle and ductile fracture, and of fatigue, in metals.
  • Analysis of fracture and fatigue in design.
  • Weibull statistics for ceramic fracture.

         (1) Chap. 6,8-10; (2) Chap. 13-19; (3) Chap. 18,23; (4) Chap. 9

Viscoelasticity and Wear of Materials (4L, Dr T Savin)

  • Constitutive modelling of materials deformation.
  • Elasticity and viscoelasticity.
  • Case studies.
  • Micromechanisms of friction and wear in materials.

         (1) Chap. 11

REFERENCES

(1) ASHBY, M., SHERCLIFF, H. & CEBON, D. MATERIALS: ENGINEERING, SCIENCE, PROCESSING AND DESIGN (3rd or 4th edition)
(2) ASHBY, M.F. & JONES, D.R.H ENGINEERING MATERIALS 1
(3) ASHBY, M.F. & JONES, D.R.H ENGINEERING MATERIALS 2
(4) CALLISTER, W.D. MATERIALS SCIENCE & ENGINEERING: AN INTRODUCTION

Booklists

Please see the Booklist for Part IA Courses for details of the references for this module.

Examination Guidelines

Please refer to Form & conduct of the examinations.

UK-SPEC

This syllabus contributes to the following areas of the UK-SPEC standard:

Toggle display of UK-SPEC areas.

GT1

Develop transferable skills that will be of value in a wide range of situations. These are exemplified by the Qualifications and Curriculum Authority Higher Level Key Skills and include problem solving, communication, and working with others, as well as the effective use of general IT facilities and information retrieval skills. They also include planning self-learning and improving performance, as the foundation for lifelong learning/CPD.

IA1

Apply appropriate quantitative science and engineering tools to the analysis of problems.

IA3

Comprehend the broad picture and thus work with an appropriate level of detail.

KU1

Demonstrate knowledge and understanding of essential facts, concepts, theories and principles of their engineering discipline, and its underpinning science and mathematics.

KU2

Have an appreciation of the wider multidisciplinary engineering context and its underlying principles.

D1

Wide knowledge and comprehensive understanding of design processes and methodologies and the ability to apply and adapt them in unfamiliar situations.

D3

Identify and manage cost drivers.

D5

Ensure fitness for purpose for all aspects of the problem including production, operation, maintenance and disposal.

S3

Understanding of the requirement for engineering activities to promote sustainable development.

E1

Ability to use fundamental knowledge to investigate new and emerging technologies.

E2

Ability to extract data pertinent to an unfamiliar problem, and apply its solution using computer based engineering tools when appropriate.

E3

Ability to apply mathematical and computer based models for solving problems in engineering, and the ability to assess the limitations of particular cases.

P1

A thorough understanding of current practice and its limitations and some appreciation of likely new developments.

P3

Understanding of contexts in which engineering knowledge can be applied (e.g. operations and management, technology, development, etc).

P4

Understanding use of technical literature and other information sources.

US1

A comprehensive understanding of the scientific principles of own specialisation and related disciplines.

US2

A comprehensive knowledge and understanding of mathematical and computer models relevant to the engineering discipline, and an appreciation of their limitations.

US3

An understanding of concepts from a range of areas including some outside engineering, and the ability to apply them effectively in engineering projects.

US4

An awareness of developing technologies related to own specialisation.

 
Last modified: 13/01/2020 10:04