ENEM13015 - Design of Machine Elements
Term 2 - 2017


All details in this unit profile for ENEM13015 have been officially approved by CQUniversity and represent a learning partnership between the University and you (our student). The information will not be changed unless absolutely necessary and any change will be clearly indicated by an approved correction included in the profile.

Overview

Design of Machine Elements is aimed at integrating and applying prior knowledge in fundamental design, materials sciences, mechanics of materials, statics and dynamics coupled with design strategies and knowledge of machine elements to design various machine components. These skills and knowledge will help you to design, analyse, synthesize and deliver robust engineering solutions. You will acquire strong analytical knowledge of machine elements, their design and load carriage and power transmission mechanics.

Details

Career Level Undergraduate
Unit Level Level 3
Credit Points 6
Student Contribution Band 2
Fraction of Full-Time Student Load 0.125

Pre-requisites or Co-requisites

Prerequisites: MATH11219 Engineering Mathematics AND (ENEM12009 Structural Mechanics OR ENEM14012 Solid Mechanics and Computational Analysis)

Attendance Requirements

All on-campus students are expected to attend scheduled classes – in some units, these classes are identified as a mandatory (pass/fail) component and attendance is compulsory. International students, on a student visa, must maintain a full time study load and meet both attendance and academic progress requirements in each study period (satisfactory attendance for International students is defined as maintaining at least an 80% attendance record).

Offerings

Term 2 - 2017
  • Bundaberg
  • Cairns
  • Distance
  • Gladstone
  • Mackay
  • Rockhampton

Website

This unit has a website, within the Moodle system, which is available two weeks before the start of term. It is important that you visit your Moodle site throughout the term. Go to Moodle

Recommended Student Time Commitment

Each 6-credit Undergraduate unit at CQUniversity requires an overall time commitment of an average of 12.5 hours of study per week, making a total of 150 hours for the unit.

Class Timetable

Assessment Overview

Assessment Task Weighting
1. Written Assessment 20%
2. Group Work 50%
3. Practical Assessment 30%

This is a graded unit: your overall grade will be calculated from the marks or grades for each assessment task, based on the relative weightings shown in the table above. You must obtain an overall mark for the unit of at least 50%, or an overall grade of ‘pass’ in order to pass the unit. If any ‘pass/fail’ tasks are shown in the table above they must also be completed successfully (‘pass’ grade). You must also meet any minimum mark requirements specified for a particular assessment task, as detailed in the ‘assessment task’ section (note that in some instances, the minimum mark for a task may be greater than 50%). Consult the University’s Grades and Results Procedures for more details of interim results and final grades.

All University policies are available on the IMPortal.

You may wish to view these policies:

  • Grades and Results Procedure
  • Assessment Policy and Procedure (Higher Education Coursework)
  • Review of Grade Procedure
  • Academic Misconduct Procedure
  • Monitoring Academic Progress (MAP) Policy and Procedure – Domestic Students
  • Monitoring Academic Progress (MAP) Policy and Procedure – International Students
  • Refund and Excess Payments (Credit Balances) Policy and Procedure
  • Student Feedback – Compliments and Complaints Policy and Procedure
  • Acceptable Use of Information and Communications Technology Facilities and Devices Policy and Procedure

This list is not an exhaustive list of all University policies. The full list of University policies are available on the IMPortal.

On successful completion of this unit, you will be able to:
  1. Develop detailed design of machine components to Australian and International Standards
  2. Apply the formal procedures of detailed machine design, including requirements, solutions, modelling and evaluation
  3. Analyse and design a range of machine elements, the physical basis of their design, usage and operational limitations
  4. Interpet various design codes and standards
  5. Work effectively in teams by: identifying individual roles and responsibility, interacting positively with colleagues, and communicating effectively at group meetings
  6. Communicate as professionals through the production of drawings (computer aided) and Bill of Materials, and through written technical reports

Learning outcomes are linked to Engineers Australia Stage 1 Competencies and also discipline capabilities. You can find the mapping for this on the Engineering Undergraduate Course website.

Alignment of Assessment Tasks to Learning Outcomes

Assessment Tasks Learning Outcomes
1 2 3 4 5 6
1 - Written Assessment      
2 - Group Work  
3 - Practical Assessment  

Alignment of Graduate Attributes to Learning Outcomes

  • Introductory Level
  • Intermediate Level
  • Graduate Level
Graduate Attributes Learning Outcomes
1 2 3 4 5 6
1. Communication
2. Problem Solving      
3. Critical Thinking    
4. Information Literacy
5. Team Work      
6. Information Technology Competence
7. Cross Cultural Competence      
8. Ethical practice  

Alignment of Assessment Tasks to Graduate Attributes

  • Introductory Level
  • Intermediate Level
  • Graduate Level
Assessment Tasks Graduate Attributes
1 2 3 4 5 6 7 8
1 - Written Assessment    
2 - Group Work
3 - Practical Assessment

Prescribed Textbooks

Shigley's Mechanical Engineering Design
Author/s: Budynas, R.G., and Nisbett, J.K. Year: 2015
Edition: 10th Publisher: McGraw Hill
City: New York State: New York
Country: USA
View textbooks at the CQUniversity Bookshop

IT Resources

You will need access to the following IT resources:
  • CQUniversity Student Email
  • Internet
  • Unit Website (Moodle)
All submissions for this unit must use the Harvard (author-date) referencing style (details can be obtained here). For further information, see the Assessment Tasks below.
Unit CoordinatorPrasad Gudimetla (p.gudimetla@cqu.edu.au)
Note: Check the Term-Specific section for any additional contact information provided by the teaching team
Week Begin Date Module/Topic Chapter Events and Submissions
Week 1 10-07-2017

Introduction to design of machine elements

Design Standards and Design Codes

Design for Strength & Stiffness - Review of static design methods

Lecture Notes

Chapters 1 - 4, Shigley

Example problems

Discussion on Assignments, Major and minor projects.

Assignment 1: Problem solving (3 Sets)

Assignment 2: Gearbox Project

Assignment 3: Gearbox Housing Project

Week 2 17-07-2017

Failure of Machine Elements and Prevention

Design for variable loading - Fatigue loading

Failure Theories

Lecture Notes

Chapters 5,6 Shigley

Solved example problems, Design case study

N.B. Assignment 1 will consist of 3 problem sets that you will solve and submit. Check submission dates for each problem set.

Assignment 2: Gearbox Design Project - Selection of application for the design of a multi-stage gearbox. One page write up on your proposed application. Refer to unit Moodle site for more details.

Week 3 24-07-2017

Part 1: Design of Shafts – materials, shaft layout, shaft design for stress deflection considerations, critical speeds, limits and fits

Part 2: Design of shaft components - keys and keyways

Lecture Notes

Chapters 7 Shigley

Solved example problems, Design case study

Gearbox design activity - Finalization of functional design parameters for gearbox, power requirements, operational conditions, sizing, concept generation, shaft layout consideration and related design calculations

Documentation of design activity

Submission (S1): Brief Proposal of your gearbox project

Week 4 31-07-2017

Design & Selection of Roller Bearings - Variable loading, Selection of ball, cylinder and tapered roller bearings, design assessment, lubrication, mounting and enclosure design

Lecture Notes

Chapters 11 Shigley

Solved example problems, Design case study

Gearbox design activity - concept generation, bearing selection for shafts and related design calculations

Documentation of design activity continues

Submission (S2): Assignment 1, Problem Set 1

Week 5 07-08-2017

Design & Selection of Journal Bearings

Lecture Notes

Chapters 12 Shigley

Solved example problems, Design case study

Gearbox design activity - recheck all calculations and confirm bearing selection, development of drawings

Documentation of design activity continues

Vacation Week 14-08-2017
Week 6 21-08-2017

Part 1: Gears – types of gears, Spur gear terminology, Lewis Bending equation, AGMA Stress equations, AGMA Strength equations, dynamic, overload, size, surface condition factors

Lecture Notes

Chapters 13 Shigley

Solved example problems, Design case study

Gearbox design activity - concept generation, gear selection and related design calculation, drawing activity continues

Documentation of design activity continues

Week 7 28-08-2017

Part 1: Design of Spur & Helical Gears – Load distribution, hardness ratio, stress cycle life, temperature, reliability factors, design of gear trains - calculation of reduction ratios, power transmission

Part 2: Design of Bevel & Helical gears

Lecture Notes

Chapters 14,15 Shigley

Solved example problems, Design case study

Gearbox design activity - concept generation, gear selection and related design calculation, drawing activity continues

Documentation of design activity continues

Submission (S3): Assignment 1, Problem Set 2

Week 8 04-09-2017

Design of Machine frames & Housings

Design of Flexible Machine Elements - belt and rope drives

Lecture Notes

Chapter 17 Shigley

Solved example problems, Design case study

Gearbox Project - all design finalization, recheck calculations, transmission ratios, tramission stage design recheck etc., develop accurate drawings for CAD models.

Rescale models to suit 3D printability and finalize all drawings, CAD data.


Documentation of design activity continues

Week 9 11-09-2017

Design of Flexible Machine Elements - chain drives

Design of Non-permanent Joints - threads

Lecture Notes

Chapter 17 Shigley

Chapter 8 Shigley

Solved example problems, Design case study

Gearbox Housing design - establish IP rating for the housing, developing dimensioning, materials, fastening mechanisms.

Submission (S4): Assignment 2 Gearbox Project

CAD files to be submitted for 3D printing.

Project 1 Due Friday (15 Sep 17) 11:45 PM AEST
Week 10 18-09-2017

Design of Non-permanent Joints - Screws and fasteners

Lecture Notes

Chapter 8 Shigley

Solved example problems, Design case study

Gearbox Housing design activity continues - finalization of all design parameters. Commence drawings for development of CAD models.

Rescale models to suit 3D printability and finalize all drawings, CAD data.

Week 11 25-09-2017

Design of Permanent Joints - welds (static design), adhesive bonding

Lecture Notes

Chapter 9 Shigley

Submission (S5): Assignment 3 Gearbox Housing Project

Project 2 Due Friday (29 Sep 17) 11:45 PM AEST
Week 12 02-10-2017

Design of Seals for static, dynamic and reciprocating applications

Design of Springs

Lecture Notes

Chapter 10 Shigley

Submission (S6): Assignment 1, Problem Set 3

Written Assessment Due Friday (06 Oct 17) 11:45 PM AEST
Review/Exam Week 09-10-2017
Exam Week 16-10-2017

ENEM13015 Design of Machine Elements is a new unit that will be delivered for the first time to both internal and distance students enrolled in CC31 and CC32 as part of the new engineering program. Drawing upon the knowledge gained in ENEM12009 Strucural Mechanics and ENEG11008 Materials for Engineers, the unit will introduce students to the design of various machine elements and assemblies for variable loading taking into consideration fatigue and endurance. It will introduce various failure criteria for the basis of such approaches and also introduce relevant design codes and standards used. Students will involve themselves in solving typical design problems, partake design and drawing activities to produce 3D printable gearbox and a gearbox housing.

1 Written Assessment

Assessment Title Written Assessment
Task Description
This assignment will consist of 3 problem sets (4 or 5 design problems per set) which you will progressively submit during the term. Each problem set will be related to a portion of the syllabus covered in some weeks and will be an extension of the solved examples and tutorial problems you will encounter in the unit.
Assessment Due Date Week 12 Friday (06-Oct-2017) 11:45 PM AEST
Return Date to Students Exam Week Friday (20-Oct-2017)
Weighting 20%
Assessment Criteria

The main criteria for assessment are:

1. Development of accurate free body diagrams (FBDs) of the problem.

2. Application of relevant theory and design equations to calculate required unknowns

3. Comment on the final results obtained.

Conditions Minimum mark or grade - 50%
Referencing Style Harvard (author-date)
Submission Online

Submit a PDF document with a clearly labelled coverpage.

Learning Outcomes Assessed
This section can be expanded to view the assessed learning outcomes

1. Develop detailed design of machine components to Australian and International Standards

2. Apply the formal procedures of detailed machine design, including requirements, solutions, modelling and evaluation

4. Interpet various design codes and standards

Graduate Attributes
This section can be expanded to view the assessed graduate attributes

1. Communication

2. Problem Solving

3. Critical Thinking

4. Information Literacy

6. Information Technology Competence

8. Ethical practice



2 Group Work

Assessment Title Project 1
Task Description

Project 1 will consist of the design and drawing of a gearbox for a particular application you will chose. This is a group assignment with a maximum of 4 team members. Please refer to the unit Moodle site for more information.

Assessment Due Date Week 9 Friday (15-Sep-2017) 11:45 PM AEST
Return Date to Students Week 11 Friday (29-Sep-2017)
Weighting 50%
Assessment Criteria

The following are the main assessment criteria for the gearbox assignment:

1. Succinct development of a case for the gearbox

2. Complete design of the various stages along with appropriate assumptions, justifications and reflections on the scope and limitations of the design.

3. Detailed design calculations for all components such as shafts, bearings, keys, keyways, gears (including number of stages)

4. Detailed, accurate and scaled engineering drawings with BOMs and all relevant specifications according to AS standards, for 3D printability

5. Comprehensive documentation of the design procedure with a list of references.

See the unit Moodle site for more detailed information.

Conditions Minimum mark or grade - 50%
Referencing Style Harvard (author-date)
Submission Online

Submit a PDF document with a clearly labelled coverpage. CAD files have to be uploaded separately.

Learning Outcomes Assessed
This section can be expanded to view the assessed learning outcomes

1. Develop detailed design of machine components to Australian and International Standards

2. Apply the formal procedures of detailed machine design, including requirements, solutions, modelling and evaluation

3. Analyse and design a range of machine elements, the physical basis of their design, usage and operational limitations

5. Work effectively in teams by: identifying individual roles and responsibility, interacting positively with colleagues, and communicating effectively at group meetings

6. Communicate as professionals through the production of drawings (computer aided) and Bill of Materials, and through written technical reports

Graduate Attributes
This section can be expanded to view the assessed graduate attributes

1. Communication

2. Problem Solving

3. Critical Thinking

4. Information Literacy

5. Team Work

6. Information Technology Competence

7. Cross Cultural Competence

8. Ethical practice



3 Practical Assessment

Assessment Title Project 2
Task Description

Project 2 relates to the design and drawing of a housing for the gearbox designed in Assignment 2. This is a group assignment and will be executed by the same team members as in Assignment 1. Please see the unit Moodle site for detailed information on the task description.

Assessment Due Date Week 11 Friday (29-Sep-2017) 11:45 PM AEST
Return Date to Students Exam Week Friday (20-Oct-2017)
Weighting 30%
Assessment Criteria

The following are the main assessment criteria for the gearbox housing assignment:

1. Succinct development of a case for the gearbox housing with comment on the selected IP rating for the housing.

2. Complete design of the housing including top and bottom cover and fastening mechanisms

3. Detailed design calculations for all components top cover, bottom cover, bolts, screws and seals

4. Detailed, accurate and scaled engineering drawings with BOMs and all relevant specifications according to AS standards, for 3D printability

5. Comprehensive documentation of the design procedure with a list of references.

See the unit Moodle site for more detailed information.

Conditions Minimum mark or grade - 50%
Referencing Style Harvard (author-date)
Submission Online

Submit a PDF document with a clearly labelled coverpage. CAD files have to be uploaded separately.

Learning Outcomes Assessed
This section can be expanded to view the assessed learning outcomes

1. Develop detailed design of machine components to Australian and International Standards

2. Apply the formal procedures of detailed machine design, including requirements, solutions, modelling and evaluation

3. Analyse and design a range of machine elements, the physical basis of their design, usage and operational limitations

5. Work effectively in teams by: identifying individual roles and responsibility, interacting positively with colleagues, and communicating effectively at group meetings

6. Communicate as professionals through the production of drawings (computer aided) and Bill of Materials, and through written technical reports

Graduate Attributes
This section can be expanded to view the assessed graduate attributes

1. Communication

2. Problem Solving

3. Critical Thinking

4. Information Literacy

5. Team Work

6. Information Technology Competence

7. Cross Cultural Competence

8. Ethical practice




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