Mechanics of Materials (ECMM107)

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Module status - Active
Module description status - Inactive
Credits - 15
College code - EMP
Academic year - 2013/4

Module staff

Duration (weeks) - term 1

0

Duration (weeks) - term 2

11 weeks

Duration (weeks) - term 3

0

Number students taking module (anticipated)

15

Module description

In this module, you will learn the fundamental theory of linear elastic fracture mechanics and its application in real life problems. This will enable you to progress to further study of Solid Mechanics, Computational Engineering and Materials. Industrial applications demand materials which stand up to many environments which may not have existed in the past; for example, MRI-compatible plastics which remain stable in an electromagnetic field, or materials which can safely perform in a frozen environment for long periods of time. Materials engineering is vital to new developments in many industries.

Module aims

This module introduces more advanced aspects of theory of elasticity as applied to solid mechanics, providing a basis for study in Solid Mechanics, Computational Engineering and Materials. It then introduces and develops experimental stress analysis, techniques for global and localised strain and stress measurement, and data analysis. It applies these to study of fracture and failure behaviour of materials and in the application of analytical techniques to problems of fracture mechanics.

 

This module covers Specific Learning Outcomes in Engineering, which apply to accredited programmes at Bachelors/MEng/Masters level. These contribute to the  educational requirements for CEng registration (as defined under the UK Standard for Professional Engineering Competence – UK-SPEC).

 


This module correlates to references P3, Mu1 - MU3, ME1, MD1, MP1, MP2, GM1, GM2 and GM4. These references are indices of the specific learning outcomes expected of Bachelors/MEng/Masters candidates set out in UK-SPEC, codified with reference to systems used by professional accrediting institutions. A full list of the standards can be found on the Engineering Council's website, at http://www.engc.org.uk

ILO: Module-specific skills

  • 1. apply computational modelling to solve problems using pre-existing packages;
  • 2. explain and analyse the theoretical basis for computational modelling, both the numerical methodologies and the mathematical models used for a range of different physical problems;
  • 3. formulate technqiues for modelling complex engineering systems using a variety of numerical techniques;
  • 4. describe the use of computational techniques in a variety of professional engineering contexts.

ILO: Discipline-specific skills

  • 5. autonomously analyse and solve engineering problems.

ILO: Personal and key skills

  • 6. independently direct your learning and work towards a defined goal;
  • 7. present your work professionally in a variety of forums, including in a classical seminar setting;
  • 8. process and utilise information from a range of sources, including academic journals and technical publications.

Syllabus plan

Week 1. Mathematical concepts of Stress and Strain. Stress vector/tensor. Hooke's Law. 2nd rank tensors: representation, mathematical theory, notations. Week 2. Plane stress and plane strain. 2d Cartesian problems. Force balance equations for stress, boundary conditions, compatibility. Airy stress function. Simple solution. Week 3. 2d problems in polar co-ordinates. Solution via analytical and numerical techniques. Evaluation of strain from stress solution. Plane strain, governing equations in 2d including body forces. Week 4. Strain measurement basics. Physical methods and limitations. Electrical resistance strain gauges: fundamental theory, application, data acquisition and data analysis. Weeks 5 & 6. Ceramic and other strain gauges. principles and theory, applications and limitations. Optical methods incl. Photostress, Frozen stress, Moiré interferometry. Correlation methods: theory, demonstration. Week 7. Yield and Strength Failure Criteria. Ductile materials, Tresca, von Mises. Week 8. Brittle materials. Inelastic deformation. Plasticity and hardening. Non hardening multi-axial plasticity. Week 9. Stress concentration factors. Fatigue and fracture. High cycle fatigue. Low cycle fatigue. Week 10. Linear elastic fracture mechanics.

Learning activities and teaching methods (given in hours of study time)

Scheduled Learning and Teaching ActivitiesGuided independent studyPlacement / study abroad
251250

Details of learning activities and teaching methods

CategoryHours of study timeDescription
Scheduled learning and teaching activities10Tutorial groups
Scheduled learning and teaching activities15Seminars
Guided independent study125Guided independent study

Summative assessment (% of credit)

CourseworkWritten examsPractical exams
75025

Details of summative assessment

Form of assessment% of creditSize of the assessment (eg length / duration)ILOs assessedFeedback method
Coursework – preliminary literature survey203-5 pagesAllWritten
Coursework – report on the computational project2510-20 pagesAllWritten
Coursework – tutorial contributions assessed in written and oral form30AllWritten
Practical – mini-seminar2520 minutesAllWritten

Details of re-assessment (where required by referral or deferral)

Original form of assessmentForm of re-assessmentILOs re-assessedTimescale for re-assessment
All aboveCoursework (100%)AllCompleted over summer in August

Re-assessment notes

If a module is normally assessed entirely by coursework, all referred/deferred assessments will normally be by assignment.
If a module is normally assessed by examination or examination plus coursework, referred and deferred assessment will normally be by examination. For referrals, only the examination will count, a mark of 40% being awarded if the examination is passed. For deferrals, candidates will be awarded the higher of the deferred examination mark or the deferred examination mark combined with the original coursework mark.

Indicative learning resources - Basic reading

ELE – http://vle.exeter.ac.uk

  1. ,Worked Examples in Fracture Mechanics,Knott J F,2nd,J F Knott,1993,620.1126 KNO,000-0-300-35640-3,
  2. ,Experimental Stress Analysis,Dally J W and Riley W F,,McGraw-Hill,1991,620.1123 DAL,000-0-070-15218-7,
  3. ,Elasticity: tensor, dyadic and engineering approaches,Chou, Pei Chi and Pagano, Nicholas J ,,Dover,1992,620.11232 CHO,000-0-486-66958-0,
  4. ,Theory of Elasticity,Timoshenko; Stephen P. and Goodier; J.N.,3rd,New York McGraw-Hill,1970,620.11232 TIM,0070858055,

Module has an active ELE page?

Yes

Module ECTS

7.5

NQF level (module)

5

Available as distance learning?

No

Origin date

19/11/12

Last revision date

19/11/12