## ENGINEERING DESIGN AND ANALYSIS 3

 SHE Level 3 SCQF Credit Points 20.00 ECTS Credit Points 10.00 Module Code M3H124814 Module Leader Martin MacDonald School School of Computing, Engineering and Built Environment Subject Mechanical Engineering Trimester A (September start)

### Pre-Requisite Knowledge

Engineering Design & Analysis 2

### Summary of Content

The aim of this module is to further develop and understanding of engineering principles and analysis with the application of these to be the design of more complex components and systems, incudiing vibration problems, mechanical integrity and power transmission. The percentage of Work Based Learning for this module, as represented by the Independent Learning "Activity Type", is 55%. The percentage of Work Based Assessment for this module is 15%, which is represented by Coursework 2.

### Syllabus

The teaching of the syllabus will cover the following areas: Mechanical Integrity: Stress analysis of components subject to compond loading such as tension, bending, torsion, pressure, rotary and thermal actions. Elastic theories of failure such as Rankine (Principal Stress Theory), Tresca (Max. Shear Stress theory), Von-Mises (Max Shear Strain Energy theory) applied to selected components as above. Principles of fatigue analysis using Soderberg and other models of fatigue diagrams incorportating component modification factors such as surface finish, stress concentrations, reliability, size effect, non-zero mean stress effects etc. Illustration of fatigue failures and consequences and discussion of relevant case studies. Strain energy concepts and methods to calculate structural deflections, principle of virtual work, unit load method. Mechanical Vibrations: Extending the earlier work of sd2 level of free damped to forced vibrations and the transmission and isolation of vibrations to/from the surrounding environment. Determination of the natural frequencies for whirling shafts, transverse beam vibrations and for distributed component or non-discrete connected systems. Application of matrix methods for the determination of natural frequencies (eigenvalue analyis) of 2 and 3 multi-degree of freedom translational and torsional systems including branching effects. Derivation of the equations of motion and 'eyeballing' methods of determining the matrix characteristics equations. Forced Vibration response of 2 degree of freedom problems and analysis of the role of tuners and absorbers. Power Transmission Systems Design: Gear systems - terminology; British Standards; basic gear geometry; design rules for single-helical and bevel gears; transmission of gear tooth forces and resultant forces at shaft bearings; gear tooth stresses bases on the Lewis formulae, typical gear/shaft assemblies; methods of lacting and securing gears on shafts. Further considerations in the design of shafts. Design of Bearings General overview of bearing types; parameters involved in design and selection of ball and roller bearings; lubrication and seals; assembling and securing bearings on shafts; selection of ball/roller bearings using manufacturer's data/catalogues Design of Connection Systems: Bolt and weld design - terminology, BS5950 design requirements; types of bolts and welds; applications; application of bolt and weld systems invarious loading conditions. Design of Structural Compression Members: Review of Euler Buckling theory, slenderness ratio, limitatations,end fixings, equivalent lengths, and other analysis techniques. National and international codes of practice design approaches, including BS and Eurocodes.

### Learning Outcomes

The expected learning outcomes are that the student should be able to :Apply the principles of strain energy to determine structural deflections.Perform accurate 2D stress analysis calculations on components subject to combined loading effects, and assess the integrity of components based on the elastic theories of failure.Explain the effect of cyclic loading and component geometry on components behaviour and assessment of component fatigue using appropriate analysis techniques.Describe vibration isolation and transmissibility and apply techniques to analyse such problems, including non-discrete systems, transverse beam vibrations and rotational problems.Analyse the dynamics of translational and torsional systems consisting of two and three degrees of freedom problems using matrix methods.Solve design problems of gear tooth generation and resultant forces produced in shaft support bearings, with reference to current codes of practice and manufacturer catalogues.Design connections between component parts using bolts and welds to current codes of practice.Design structural compression members using analysis techniques and current codes of practice.

### Teaching / Learning Strategy

The material covered during lectures will be reinforced and consolidated through tutorials, seminars and practical laboratory work. Students will study and solve real world engineering problems encouraging divergent thinking and broader, deeper learning. Students will take part in practical laboratory work which will enhance data acquisition and manipulation skills, individual and group working skills, technical report writing skills and communication skills in general. Through the study of national and international engineering codes of practice, students will be global learners. The students will be encouraged to reflect upon the theoretical learning within the work place and the application of newly learned concepts to the work environment. Through the use of the managed learning environment GCU Learn, students will become more engaged, flexible and independent in their learning as there will be a wide range of learning resources available on line. In addition to the core module content, links to relevant databases for the sourcing of additional reading material from the current research in the subject area from around the world, and notices regarding relevant professional body talks in the local area will be made available. The assessment of the students will incorporate laboratory and design and analysis work based on real world engineering problems through group and individual coursework, and an examination. Students will receive individualised feedback on their performance through one-to-one contact with tutors at tutorials and seminars and marked coursework, which will reinforce the students' learning, and examination results. Work Based Education aims to maximise the direct and digitally mediated contact time with students by practicing teaching and learning strategies that use authentic work based scenarios and encourage action learning, enquiry based learning, problem based learning and peer learning. All these approaches aim to directly involve the students in the process of learning and to encourage sharing of learning between students. The module team will determine the level and accuracy of knowledge acquisition at key points in the delivery, inputting when necessary either directly or with the support of external experts who will add to the authenticity, the credibility and application of the education and learning to the workplace.

Recommended Texts: "Shingley's Mechanical Engineering Design"; R Budynas and K. Nisbett, 9th Ed.; McGraw-Hill, 2010 "Mechanical Design of Machine Elements and Machines"; Collins, Busby and Staab, 2nd Ed. Wiley 2010 "Formulae for Stress and Strain"; R J Roark and W C Young; McGraw-Hill; 2012, 8th Ed. "Mechanics of Materials" E J Hearn, Vols 1 & ", Butterworth, 3rd Ed. 1997 "Theory of Vibration with Application", W T Thomson, Chapman & Hall 5th Ed., 1997 "Mechanics of Engineering Materials", Benham, Crawford & Armstrong, 2nd Edition 1996 "Mechanics of Materials", DeSilva,C.W., CRC Press, 2014. "Mechanics of Solids and Structures", Fenner,R.T and Reddy,J.N., CRC Press, 2012.

### Transferrable Skills

Manage and present data in a variety of ways and be proficient in generic IT skills. Creative and innovative approaches, combined with scientific and engineering evidence to real world engineering problem solving. Time management skills, professional behaviours, reflective approach to learning, communication skills including oral, written and visual, and team working.

### Module Structure

Activity Total Hours
Independent Learning (FT) 110.00
Lectures (FT) 36.00
Seminars (FT) 8.00
Assessment (FT) 18.00
Tutorials (FT) 18.00
Practicals (FT) 10.00

### Assessment Methods

Component Duration Weighting Threshold Description
Coursework 2 n/a 15.00 n/a Report
Exam (Exams Office) 2.50 70.00 35% Exam
Coursework 1 n/a 15.00 n/a Numerical Analysis and report