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Aerospace Structures, Materials and Dynamics

  • Module code: AE5022
  • Year: 2018/9
  • Level: 5
  • Credits: 30
  • Pre-requisites: None
  • Co-requisites: None

Summary

This module reinforces your prior knowledge of statics, materials and dynamics and introduces topics of particular relevance to aerospace studies. The module includes further work on the analysis of beams, materials used in aerospace such as composites and develops the students understanding of vibration theory as well as application of dynamics of particles and rigid bodies in aerospace. Topics such as Bredt-Batho theory and aircraft dynamic performance and stability and Finite Element application in static and dynamic analysis of structures are also introduced. The module is primarily delivered through interactive lectures and practical laboratory sessions and is supported by tutorials, where students have to practise using problem sets. Course materials are available via VLE where appropriate.

Aims

  • To develop  the skills to solve engineering problems related to the static and dynamic loading characteristics of aerospace vehicles.
  • To develop practical skills in measurement of strain, deflection and vibrations in stationery and moving engineering components.
  • To carry out finite element modelling and static/dynamic analysis of simple structures 
  • To carry out Analysis of engineering materials and develop skills in selection of materials for aerospace applications

Learning outcomes

On successful completion of the module, students will be able to:

  • Analyse problems related to direct stress utilising buckling analysis and asymmetric sections.
  • Determine flexural and torsional shear stress distributions in thin-walled sections typically found in aerospace structures.
  • Derive and solve mathematical models for vibratory systems with one and more degree of freedom under free and forced conditions.
  • Describe and analyse problems related to the performance, stability and control of aircraft.
  • Measure strain, deflection and vibrations in components, analyse the results and write a technical report Use finite element modelling  (FEM) to design structures including composite structures
  • Use finite element modelling  (FEM) to design and optimise structures including composite structures

Curriculum content

  • Beam deflections, asymmetric sections, safety factors and buckling
  • Flexural shear stress distribution, shear centre of open thin-walled sections.
  • Bredt-Batho theory for single cell sections.
  • Free and forced vibration of damped single degree of freedom and mathematical modelling.
  • Introduction to aircraft performance and analysis, using dynamics of particles
  • Introduction and analysis of aircraft stability and control using rigid body dynamics
  • Introduction of Finite Element Modelling and Analysis using an FE computer package.
  • Mechanical properties of engineering materials
  • Macromechanics of composite materials.
  • Design and optimisation of composite structures.

Teaching and learning strategy

This module is delivered through a variety of lectures, seminars and practical laboratory sessions. Lectures are designed to introduce students to the key features of each topic and to lay the preparatory ground for the application of knowledge to problem solving. The practical laboratory sessions provide students with an environment to develop and refine practical skills and to develop their understanding through the application of knowledge to the practical environment.  The computing workshops allow students to apply their knowledge of FEA acquired in the lectures and assigned reading and the tutorials provide support to ensure students are able to apply the theoretical knowledge they have acquired is solving the assigned problem sets

A significant element of this module is independent guided learning and a rough breakdown of how this time will be spent is given in the table below.  Students will be issued with structured problem sets including answers at the beginning of the module.  They will also be issued with an indicative set of dates by which each should be completed.  This is similar to the approach used for level 4 modules, but at level 5 students are expected to monitor their own progress and seek help as required.  Personal tutors are available to advise students on finding support, but will not meet their tutees as frequently as the previous year.

Breakdown of Teaching and Learning Hours

Definitive UNISTATS Category Indicative Description Hours
Scheduled learning and teaching 33 two hour keynote and interactive lectures 11 two hour computer workshops 3 practical laboratory sessions of 2 hours each 11 two hour tutorial sessions 66 22 6 22
Guided independent study Independent pre-reading and review of lectures (50 hrs) Problem sets (80 hrs) Test and Exam preparation and revision (34 hrs) Writing up lab reports (20 hrs) 184
Total (number of credits x 10) 300

Assessment strategy

Summative assessment is through a portfolio of laboratory reports worth 30% (4 reports), a portfolio of 2 in-course test designed to test student's engagement with the underpinning knowledge associated with the module worth 20% and a three hour end of module examination worth 50% which will require students to answer 4 extended questions. Formative assessments are used to provide feed forward for the summative assessments.

Mapping of Learning Outcomes to Assessment Strategy (Indicative)

Learning Outcome Assessment Strategy
1. Analyse problems related to direct stress utilising buckling analysis and asymmetric sections. Examination and in-course assessment.
2. Determine flexural and torsional shear stress distributions thin-walled sections typically found in aerospace structures. Examination and in-course assessment.
3. Derive and solve mathematical models for vibratory systems with one and more degree of freedom. Examination and in-course assessment.
4. Describe and analyse problems related to the performance, stability and control of aircraft. Examination and in-course assessment.
5. Measure strain, deflection and vibrations in components, analyse the results and write technical Submission of two laboratory reports.
6. Use finite element modelling (FEM) to design and optimise structures including composite structures Submission of a design report.

Elements of Assessment

Description of Assessment Definitive UNISTATS Categories Percentage
Portfolio of in-class tests (2 tests worth 10% each) Written exam 20%
Portfolio of lab reports (2 reports worth 5% and 2 worth 10%) Coursework 30%
Three hour end of module examination Written exam 50%
Total (to equal 100%) 100%

Achieving a pass

It IS NOT a requirement that any element of assessment is passed separately in order to achieve an overall pass for the module.

Bibliography core texts

  • Megson, T.H.G., Aircraft Structures for Engineering Students, 4th edition, 2007,Elsevier, ISBN: 0750667397
  • Rao, S.S., Mechanical Vibrations, Pearson Pub., 2005, ISBN 0-13-196751-7.
  • Anderson J.D.,  Introduction To Flight, 7th edition, McGraw-Hill, 2010, ISBN-9780071086059

Bibliography recommended reading

  • Cook R.D., Malkus D.S. and Plesha M.E, Concepts and Applications of Finite Element Analysis, 4th Edition,2001, ISBN 0471356050
  • Gere J M and Timoshenko S, Mechanics of Materials, Third SI Edition, Chapman and Hall, 1991, ISBN: 0412368803.
  • NAFEMS, Finite Element Primer, HMSO.
  • Becker A A, An Introductory Guide to Finite Element Analysis, Professional Engineering Publishing, 2004, ISBN 1 86058 410 1.
  • Gere J M and Timoshenko S, Mechanics of Materials, Third SI Edition, Chapman and Hall, 1991, ISBN: 0412368803.
  • NAFEMS, Finite Element Primer, HMSO.
  • Peery, D.J. & Azar J. J. Aircraft Structures, McGraw-Hill, ISBN-0-07-049196-8
  • Michael C. Y. Niu, Airframe Stress Analysis and Sizing, 2nd edition, 2001, Conmilit Press Ltd, ISBN: 9627128082.
  • Barnard & Philpott, Aircraft Flight, Longman, ISBN 0582003385.
  • Anderson, J., Aircraft Performance and Design, McGraw-Hill, ISBN0071160108

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