Engineering Institute of Technology

 

Unit Name

MECHANICS OF MACHINES

Unit Code

BSC105C

 

Unit Duration

Term

Award

Bachelor of Science (Engineering)

 

Duration 3 years

Year Level

One

Unit Creator/Reviewer

 

Core/Elective

Core

Pre/Co-requisites

BSC104C, BSC107C

Credit Points

3

 

Total Program Credit Points 81 (27 x 3)

Mode of Delivery

Online or on-campus.

Unit Workload

(Total student workload including “contact hours” = 10 hours per week)

Pre-recordings / Lecture – 1.5 hours Tutorial – 1.5 hours

Guided labs / Group work / Assessments – 2 hours

Personal Study recommended - 5 hours

The objective in presenting this unit is to provide students with broad knowledge of the functions of machines/mechanisms – as a necessity for optimum machine design – and the fundamental principles of simple machine elements – which are frequently employed as devices in modern complex machines.

 

The subject matter covered in this unit will include: the different types of links and joints making up mechanisms; velocity and acceleration analysis; static and dynamic force analysis; design and analysis of cams, gears, drive trains, and flywheels; the characteristics of bearings, belt and chain drives, couplings, clutches, and brakes; balancing techniques for rotating and reciprocating masses; and, an overview of different governor types and their working principles and characteristics.

 

At the conclusion of this unit, students will have been imparted with relevant knowledge to assist them in analyzing, designing, selecting, and evaluating mechanisms for various applications.

 

Learning Outcomes

 

On successful completion of this Unit, students are expected to be able to:

  1. Analyze, design, select, and evaluate mechanisms for various applications.

  2. Apply typical analytical and graphical techniques to a variety of mechanical engineering components and systems.

  3. Perform static and dynamic force analysis.

  4. Carry out performance evaluation of cams.

  5. Design and select gear, belt and chain drives, bearings, couplings clutches, and brakes for various applications.

  6. Perform balancing calculations for rotating and reciprocating machinery, and calculate the gyroscopic forces for rotating machines.

  7. Evaluate the characteristics of different governor types.

    Professional Development

    Completing this unit may add to students professional development/competencies by:

    1. Fostering personal and professional skills and attributes in order to:

      1. Conduct work in a professionally diligent, accountable and ethical manner.

      2. Effectively use oral and written communication in personal and professional domains.

      3. Foster applicable creative thinking, critical thinking and problem solving skills.

      4. Develop initiative and engagement in lifelong learning and professional development.

      5. Enhance collaboration outcomes and performance in dynamic team roles.

      6. Effectively plan, organise, self-manage and manage others.

      7. Professionally utilise and manage information.

      8. Enhance technologist literacy and apply contextualised technologist skills.

    2. Enhance investigatory and research capabilities in order to:

      1. Develop an understanding of systematic, fundamental scientific, mathematic principles, numerical analysis techniques and statistics applicable to technologists.

      2. Access, evaluate and analyse information on technologist processes, procedures, investigations and the discernment of technologist knowledge development.

      3. Foster an in-depth understanding of specialist bodies of knowledge, computer science, engineering design practice and contextual factors applicable to technologists.

      4. Solve basic and open-ended engineering technologist problems.

      5. Understand the scope, principles, norms, accountabilities and bounds associated with sustainable engineering practice.

    3. Develop engineering application abilities in order to:

      1. Apply established engineering methods to broadly-defined technologist problem solving.

      2. Apply engineering technologist techniques, tool and resources.

      3. Apply systematic technologist synthesis and design processes.

      4. Systematically conduct and manage technologist projects, work assignments, testing and experimentation.

Engineers Australia

The Australian Engineering Stage 1 Competency Standards for Engineering Technologists, approved as of 2013. This table is referenced in the mapping of graduate attributes to learning outcomes and via the learning outcomes to student assessment.

 

Stage 1 Competencies and Elements of Competency

1.

Knowledge and Skill Base

1.1

Systematic, theory based understanding of the underpinning natural and physical sciences and the engineering fundamentals applicable to the technology domain.

1.2

Conceptual understanding of the, mathematics, numerical analysis, statistics, and computer and information sciences which underpin the technology domain.

1.3

In-depth understanding of specialist bodies of knowledge within the technology domain.

1.4

Discernment of knowledge development within the technology domain.

1.5

Knowledge of engineering design practice and contextual factors impacting the technology domain.

1.6

Understanding of the scope, principles, norms, accountabilities and bounds of sustainable engineering practice in the technology domain.

2.

Engineering Application Ability

2.1

Application of established engineering methods to broadly-defined problem solving within the technology domain.

2.2

Application of engineering techniques, tools and resources within the technology domain.

2.3

Application of systematic synthesis and design processes within the technology domain.

2.4

Application of systematic approaches to the conduct and management of projects within the technology domain.

3.

Professional and Personal Attributes

3.1

Ethical conduct and professional accountability.

3.2

Effective oral and written communication in professional and lay domains.

3.3

Creative, innovative and pro-active demeanour.

3.4

Professional use and management of information.

3.5

Orderly management of self and professional conduct.

3.6

Effective team membership and team leadership.

Graduate Attributes

Successfully completing this Unit will contribute to the recognition of attainment of the following graduate attributes aligned to the AQF Level 7 criteria, Engineers Australia Stage 1 Competency Standards for Engineering Technologists and the Sydney Accord:

 

Graduate Attributes

(Knowledge, Skills, Abilities, Professional and Personal Development)

EA Stage 1 Competencies

Learning Outcomes

A. Knowledge of Science and Engineering Fundamentals

A1. Breadth of knowledge of engineering and systematic, theory-based understanding of underlying principles, and depth of knowledge across one or more engineering sub- disciplines

 

1.1, 1.3

 

1, 2, 3, 4, 5, 6, 7

A2. Knowledge of mathematical, statistical and computer sciences appropriate for engineering technology

 

1.2

 

2, 3, 5, 6

A3. Discernment of knowledge development within the technology domain

1.4

3, 4, 6, 7

A4. Knowledge of engineering design practice and contextual factors impacting the technology domain

 

1.5

 

1, 5

B. Problem Solving, Critical Analysis and Judgement

B1. Ability to research, synthesise, evaluate and innovatively apply theoretical concepts, knowledge and approaches across diverse engineering technology contexts to effectively solve engineering problems

 

1.4, 2.1, 2.3

 

1, 3, 4

B2. Technical and project management skills to design complex systems and solutions in line with developments in engineering technology professional practice

 

2.1, 2.2, 2.3, 3.2

 

C. Effective Communication

C1. Cognitive and technical skills to investigate, analyse and organise information and ideas and to communicate those ideas clearly and fluently, in both written and spoken forms appropriate to the audience

 

3.2

 

3, 4

C2. Ability to engage effectively and appropriately across a diverse range of cultures

3.2

 

D. Design and Project Management

D1. Apply systematic synthesis and design processes within the technology domain

2.1, 2.2, 2.3

1, 5

D2. Apply systematic approaches to the conduct and management of projects within the technology domain

 

2.4

 

4, 6

E. Accountability, Professional and Ethical Conduct

E1. Innovation in applying engineering technology, having regard to ethics and impacts including economic; social; environmental and sustainability

 

1.6, 3.1, 3.4

 

E2. Professional conduct, understanding and accountability in professional practice across diverse circumstances including team work, leadership and independent work

 

3.3, 3.4, 3.5, 3.6

 

3, 4

Unit Competency and Learning Outcome Map

This table details the mapping of the unit graduate attributes to the unit learning outcomes and the Australian Engineering Stage 1 Competency Standards for the Engineering Technologist.

 

 

 

Graduate Attributes

A1

A2

A3

A4

B1

B2

C1

C2

D1

D2

E1

E2

 

Engineers Australia Stage 1 Competency Standards for Engineering Technologist

1.1

 

 

 

 

 

 

 

 

 

 

 

1.2

 

 

 

 

 

 

 

 

 

 

 

1.3

 

 

 

 

 

 

 

 

 

 

 

1.4

 

 

 

 

 

 

 

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

 

1.6

 

 

 

 

 

 

 

 

 

 

 

2.1

 

 

 

 

 

 

 

 

 

2.2

 

 

 

 

 

 

 

 

 

 

2.3

 

 

 

 

 

 

 

 

 

2.4

 

 

 

 

 

 

 

 

 

 

 

3.1

 

 

 

 

 

 

 

 

 

 

 

3.2

 

 

 

 

 

 

 

 

 

3.3

 

 

 

 

 

 

 

 

 

 

 

3.4

 

 

 

 

 

 

 

 

 

 

3.5

 

 

 

 

 

 

 

 

 

 

 

3.6

 

 

 

 

 

 

 

 

 

 

 

 

Unit Learning Outcomes

LO1

 

 

 

 

 

 

 

 

LO2

 

 

 

 

 

 

 

 

 

 

LO3

 

 

 

 

 

 

LO4

 

 

 

 

 

 

LO5

 

 

 

 

 

 

 

 

LO6

 

 

 

 

 

 

 

 

LO7

 

 

 

 

 

 

 

 

 

 

Student assessment

 

 

Assessment Type

When assessed

Weighting

 

(% of total unit marks)

Learning Outcomes Assessed

 

Assessment 1

Type: Multi-choice test / Group work / Short answer questions

Example Topic: Basics of kinematics and mechanisms.

Students may complete a quiz with MCQ type answers and solve some simple equations to demonstrate a good understanding of the fundamental concepts.

 

Week 3

 

15%

 

1

 

Assessment 2

Type: Multi-choice test / Group work / Short answer questions / Practical / Remote Lab / Simulation

Example Topic: Velocity and acceleration analysis of mechanisms, static and dynamic force analysis.

Students may be asked to provide solutions to simple problems on various topics.

 

Week 6

 

20%

 

2, 3

 

Assessment 3

Type: Multi-choice test / Group work / Short answer questions / Practical / Remote Lab / Simulation / Project

Example Topic: Gear, belt and chain drives, bearings, clutches, brakes, cams, flywheels, gyroscopes.

Students may complete a quiz with MCQ type answers or solve some simple problems or use software to complete a practical.

 

Week 9

 

20%

 

4, 5, 6

 

Assessment 4 Type: Examination All topics

An examination with a mix of detailed report type questions and/or simple numerical problems to be completed in 3 hours.

 

Final Week

 

40%

 

5, 6

 

Attendance / Tutorial Participation

Example: Presentation, discussion, group work, exercises, self-assessment/reflection, case study analysis, application.

Continuous

5%

1 to 7

Prescribed and recommended readings

Suggested Textbook

  • Machines and Mechanisms, Applied kinematic analysis. 4th Edition, David H. Myszka, Prentice Hall, ISBN 9780132157803

  • Wilson, CE, Sadler, JP 2003, Kinematics and Dynamics of Machinery, 3rd edn, Prentice Hall, ISBN-13: 978-0201350999

     

    To be confirmed by lecturer.

     

    Reference Materials

  • Waldron KJ, Kinzel, GL 2003, Kinematics, Dynamics, and Design of Machinery, 2nd edn, John Wiley & Sons Inc., ISBN-13: 978-0471244172

  • Peer reviewed Journals

  • Knovel library: http://app.knovel.com

  • IDC Technologies publications

  • Other material and online collections as advised during the lectures

 

Unit Content

One topic is delivered per contact week, with the exception of part-time 24-week units, where one topic is delivered every two weeks.

 

Topics 1 and 2

Introduction to Kinematics and Mechanisms

  1. Kinematic pairs

  2. Kinematic chains

  3. Degree of freedom, mobility

  4. Inversion

  5. Kutzbach’s criterion

  6. Gruebler’s criterion

  7. Grashof’s Law

  8. Inversions of four bar and slider crank chains

  9. Description of common mechanisms - quick return mechanisms, straight line motion mechanisms, intermittent motion mechanisms

  10. Pantograph

.

Topic 3

Velocity and Acceleration Analysis of Mechanisms

  1. Velocity and acceleration analysis of four bar mechanism, slider crank mechanism, and simple mechanisms by vector polygons

  2. Relative velocity and acceleration of particles in common and separate links

  3. Coriolis component of acceleration

  4. Angular velocity and angular acceleration of links

  5. Velocity of rubbing

  6. Analysis of four bar chain and slider crank chain using analytical expressions

 

Topic 4

Static and Dynamic Force Analysis

  1. Static equilibrium

  2. Free body diagrams

  3. Static force analysis of four bar mechanism and slider-crank mechanism with and without friction

  4. D'Alembert's principle

  5. Inertia force, inertia torque

  6. Dynamic force analysis of four-bar mechanism and slider crank mechanism

 

Topic 5

Theory of gears

  1. Gear types – terms and definitions

  2. Gear equations

  3. Pressure angle, gear tooth force

  4. Shaft loads, torque, power

  5. Load factors, service factoring

  6. Backlash and alignment

  7. Speed ratio and performance evaluation of gear trains

  8. Planetary gear case

 

Topic 6

Theory of Cams

  1. Cam motions and dynamics

  2. Types of cam follower mechanisms

  3. Follower motion diagrams and design of cam profiles

  4. Pressure angle and undercutting

  5. Performance evaluation of cams

 

Topic 7

Bearings, Belts, Chains, Couplings, Brakes, Clutches

  1. Bearings – types, loads, clearance, pre-loading

  2. Belt and chain drives – principles, types, tension, loads

  3. Couplings – types, load factors

  4. Clutches and brakes – types, calculations

  5. Introduction to Mesys software

 

Topic 8

Flywheels and gyroscopes

  1. Flywheels

  2. Turning moment diagram

  3. Determination of size of flywheels

  4. Gyroscopic forces and couple

  5. Gyroscopic effect in aero planes, ship motion, and vehicles moving on a curved path

 

Topics 9 and 10

Balancing

  1. Definition of balancing

  2. Causes of unbalance

  3. Shaft alignment

  4. Balancing of rotating masses

  5. Balancing of single rotating mass by balancing masses in the same plane and in different planes

  6. Balancing of several rotating masses by balancing masses in the same plane and in different planes

  7. Static and dynamic balancing

  8. Field balancing of discs and rotors

  9. Balancing reciprocating masses

  10. Determination of out-of-balance forces

 

Topic 11

Governors

  1. Need for governors

  2. Types of governors

  3. Stability, sensitivity, isochronism, effort, and power

  4. Effect of friction

  5. Hunting of governors

 

Topic 12

Unit Review

In the final week students will have an opportunity to review the contents covered so far. Opportunity will be provided for a review of student work and to clarify any outstanding issues. Instructors/facilitators may choose to cover a specialized topic if applicable to that cohort.

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