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Module Specifications

Archived Version 2007 - 2008

Module Title	Strength of Materials I
Module Code	MM211
School	School of Mechanical and Manufacturing Engineering
Online Module Resources
Module Co-ordinator	Prof Lisa Looney	Office Number	Ag40
Level	2	Credit Rating	5
Pre-requisite	None
Co-requisite	None

Module Aims

To introduce a method of selecting engineering materials which takes into account requirements which may be conflicting, of different relative importance or non mechanical (e.g. environmental) in nature.

To make the students familiar with a range of modes of failure, with particular emphasis on fracture, time dependent deformation mechanisms and elastic failure of a simple component.

Learning Outcomes

Having successfully completed this module the student will be able to:

1. mathematically represent a mix of property requirements for particular applications and design goals, and then use material selection charts to identify a subset of suitable materials.

2. interpret the environmental impact of materials at different phases of product life cycle to assess key mechanical properties in good environmental design.

3. describe failure from crack growth, corrosion, fatigue and creep deformation, and apply appropriate methods of analysis.

4. describe the behaviour of materials under elastic loading

5. use graphical techniques and carry out calculations to find forces, moments, stresses and deflections for simple beam elements under point, distributed and moment loads.

Indicative Time Allowances
	Hours
Lectures	24
Tutorials	12
Laboratories	12
Seminars	0
Independent Learning Time	27

Total	75
Placements
Assignments

NOTE

Assume that a 5 credit module load represents approximately 75 hours' work, which includes all teaching, in-course assignments, laboratory work or other specialised training and an estimated private learning time associated with the module.

Indicative Syllabus

· Overview of ‘Design to avoid Failure’.

A revision of concepts: force, stress, strain.

Review of classes of engineering materials, their properties and main failure mechanisms.

· Materials Selection: Basics of materials selection when balancing requirements (Materials selection charts). How to consider environmental impact. Use of Cambridge Engineering selector (CES), Case studies.

· Fast Fracture Failure: Fracture Mechanics- Stress concentration, strain energy release rate, linear elastic FM

· Time Dependant Failure Mechanisms:

Fatigue: Stress cycles, test methods, micro-mechanisms of fatigue

Creep: Stress – time – temperature relationship, creep rupture testing

Failure by corrosion: Common corrosion reactions, forms of corrosion, materials loss rates

· Elastic Failure :

Bending moments and shear forces,

Bending stress theory,

Deflection of a beam.

Assessment
Continuous Assessment	20%	Examination Weight	80%

Indicative Reading List

MF Ashby, Materials Selection in Mechanical Design, 3^nd ed., Elsevier-BH.
MG Fontana, Corrosion Engineering, 3^rd ed., McGraw-Hill.
PP Benham, RJ Crawford & CG Armstrong, Mechanics of Engineering Materials, 2nd ed. Longman Group Ltd.
Hearn, E. J., Mechanics of Materials 1 & 2: an introduction to the mechanics of elastic and plastic materials. - 3rd ed. - Boston: Butterworth-Heinemann.
Collins, J.A. Failure of Materials in Mechanical Design, 2^nd ed., J Wiley & Sons.
A.P. Boresi, R.J. Schmidt, O.M. Sidebottom, Advanced Mechanics of Materials 5^th ed., J Wiley & Sons.
D.W.A. Rees, Basic Solid Mechanics, Mac Millan Press Ltd.
D Roylance, Mechanics of Materials, J Wiley & Sons.

Contribution to Programme:

The module’s contribution to the IEI Programme Areas and Programme Outcomes is characterised according to a five point scale where 4 indicates a very strong contribution and 0 indicates no significant or intended contribution.

Science & Mathematics

Discipline - specific Technology

Information and Communications Technology

Design and Development

Engineering Practice

Social and Business Context

0

4

0

3

1

0

Knowledge and Its Application:

Problem Solving:

Design:

Ethical Practice:

Effective Work and Learning:

Effective Communication:

3

4

3

0

2

3

Teaching & Learning Strategies/Assessment Methodology:
Lectures are used to teach principles, illustrating these with examples. Modules notes with some missing detail and space for note taking in class are made available. Assisted tutorials provide an opportunity for learners to apply knowledge and practice calculations.

Laboratory work includes both individual and group exercises, and requires oral and written reports. Oral reports with immediate constructive feedback take place early in the semester. They are particularly useful to teach analysis and interpretation of data. They also help to learners gain confidence in their ability to communicate technical ideas and concepts orally.

Continuous Assessment 20% of Marks, Exam worth 80%.

Programme or List of Programmes

BME

BEng Manufacturing Engineering &Business

BSSA

Study Abroad (DCU Business School)

BSSAO

Study Abroad (DCU Business School)

CAM

B.Eng. Mechanical & Manufacturing Eng

ECSA

Study Abroad (Engineering & Computing)

ECSAO