Timing and Structure
Lent: 12 lectures (1 or 2 per week); Easter: 8 lectures (2 or 3 per week)
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.
- Develop systematic strategies for material and process selection for a given component.
As specific objectives, by the end of the course students should be able to:
- Describe the atomic and microstructural characteristics which control the important 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
- Understand the mechanisms for plastic flow in metals, and the ways in which the strength can be enhanced via the microstructure
- Understand the purpose of modelling the deformation response of materials
- Describe and analyse the stress-strain response of simple geometries under uniform mechanical and thermal loads, distinguishing between true and nominal stress and strain
- 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 failure in all classes of material
- Apply fracture mechanics analysis to design against fracture in metals, and Weibull failure statistics for design in ceramics
- Describe and model fatigue fracture in design with metals
- Analyse the visco-elastic response of polymers, for both static and cyclic loading
- Briefly describe the mechanisms of wear in engineering
Introduction (1L, Dr H.R. Shercliff)
Classes of engineering materials; materials in design (design-limiting properties); life-cycle of materials. (1) Chap. 1,2,20; (2) Chap. 1,3; (3) Chap. 30; (4) Chap. 27
Elastic Properties of Materials (5L, Dr H.R. Shercliff)
- Elastic stiffness in design: analysis of stress and strain, thermal stress. (1) Chap. 4,12; (3) Chap. 3; (5) Chap. 7
- Young's modulus and density: measurement, data and materials property charts: introduction to Cambridge Engineering Selector software; stiffness-limited component design. (1) Chap. 4,5; (2) Chap. 3-6; (3) Chap. 3,7; (5) Chap. 7
- Microstructure of engineering materials I: Atomic/molecular structure and bonding; physical basis of elastic modulus and density. (1) Chap. 4; (3) Chap. 4-6; (5) Chap. 2-4
- Manipulating properties I: Elastic properties in composites and foams. (1) Chap. 4; (2) Chap. 13; (3) Chap. 6
Plastic Properties of Materials (4L, Dr H.R. Shercliff)
- Tensile and hardness testing, measurement of strength, data and material property charts: strength-limited component design. (1) Chap. 6,7; (2) Chap. 3-6; (3) Chap. 8,11,12,31; (4) Chap. 4-6; (5) Chap. 7
- Microstructure of engineering materials II: Atomic basis of plasticity, dislocations. (1) Chap. 6; (3) Chap. 9; (5) Chap. 8
- Manipulating properties II: Strengthening mechanisms in metals. (1) Chap. 6,14; (3) Chap. 10; (5) Chap. 8,12
Process Selection and Environmental Impact in Design (2L, Dr H.R. Shercliff)
- Selection of manufacturing process and cost estimation for batch processes. (1) Chap. 18; (2) Chap. 7,8
- Environmental impact and life cycle analysis of materials. (1) Chap. 20; (2) Chap. 16; (5) Chap. 21
Fracture and Fatigue of Materials (4L, Dr A.E. Markaki)
- Toughness, fracture toughness and fatigue fracture.
- Micromechanisms of fracture and fatigue in metals.
- Analysis of fracture and fatigue in design.
- Weibull statistics for ceramic fracture.
- Polymer failure mechanisms.
(1) Chap. 6,8-10; (3) Chap. 13-19; (4) Chap. 18,23; (5) Chap. 9
Viscoelasticity and Wear of Materials (4L, Dr A Kabla)
- Constitutive modelling of materials deformation.
- Elasticity and viscoelasticity.
- Case studies.
- Micromechanisms of friction and wear in materials.
(1) Chap. 11
(1) ASHBY, M., SHERCLIFF, H. & CEBON, D. MATERIALS: ENGINEERING, SCIENCE, PROCESSING AND DESIGN
(2) ASHBY, M.F. MATERIALS SELECTION IN MECHANICAL DESIGN
(3) ASHBY, M.F. & JONES, D.R.H ENGINEERING MATERIALS 1
(4) ASHBY, M.F. & JONES, D.R.H ENGINEERING MATERIALS 2
(5) CALLISTER, W.D. MATERIALS SCIENCE & ENGINEERING: AN INTRODUCTION
Please see the Booklist for Part IA Courses for details of the references for this module.
Please refer to Form & conduct of the examinations.
The UK Standard for Professional Engineering Competence (UK-SPEC) describes the requirements that have to be met in order to become a Chartered Engineer, and gives examples of ways of doing this.
UK-SPEC is published by the Engineering Council on behalf of the UK engineering profession. The standard has been developed, and is regularly updated, by panels representing professional engineering institutions, employers and engineering educators. Of particular relevance here is the 'Accreditation of Higher Education Programmes' (AHEP) document which sets out the standard for degree accreditation.
The Output Standards Matrices indicate where each of the Output Criteria as specified in the AHEP 3rd edition document is addressed within the Engineering and Manufacturing Engineering Triposes.
Last modified: 31/05/2017 10:00