# ENG06079 2019 Mechanics 2

### General Details

Full Title
Mechanics 2
Transcript Title
Mechanics 2
Code
ENG06079
Attendance
N/A %
Subject Area
ENG - Engineering
Department
MECT - Mechatronics
Level
06 - NFQ Level 6
Credit
05 - 05 Credits
Duration
Semester
Fee
Start Term
2019 - Full Academic Year 2019-20
End Term
9999 - The End of Time
Author(s)
Molua Donohoe, Sean Dalton, Declan Sheridan
Programme Membership
SG_EMECL_B07 201900 Bachelor of Engineering in Mechanical Engineering SG_EPREC_B07 201900 Bachelor of Engineering in Precision Engineering and Design SG_EMECL_C06 201900 Higher Certificate in Engineering in Mechanical Engineering SG_EMTRN_B07 201900 Bachelor of Engineering in Mechatronic Engineering SG_EMTRN_C06 201900 Higher Certificate in Engineering in Mechatronic Engineering
Description

This module has been designed to give the student an appreciation into how stress affects materials in practical situations. It is assumed that the student will have successfully completed the 1st year mechanics course and so understands how to represent forces, vector quantities, and understands stress / strain relationships.

In this module the student will look at applied mechanics problems such as

• Stress in compound bars,
• Shear force, shear stress, and shear strain, Poisson's ratio
• Shear force and bending moment diagrams.
• Centrifugal forces and rotation.
• Torsion
• Thermal strain
• Hoop stress in thin walled pressure vessels and thin rotating rings.

This module is taught by a number of lecturers and includes many real life examples of how mechanics is used.

### Learning Outcomes

On completion of this module the learner will/should be able to;

1.

Define the terms "stress" and "strain" and determine the stress and strain that each material in a compound bar experiences

2.

Be able to explain what shear force, shear stress and shear strain mean, plus calculate the shear stress components experience is certain practical situations

3.

Construct a shear force and bending moment diagram for simply supported and cantilever beams, which are loaded with point loads or uniformly distributed loads.

4.

Be able to calculate shear stress, angle of twist, and torque in rotating shafts.

5.

Identify instances, effects and applications of thermal strain and calculate stresses resulting from changes in temperature

6.

Determine the centrifugal forces set up in different scenarios.

7.

Calculate the hoop stress set up in thin walled pressure vessels and in thin rotating rings.

### Teaching and Learning Strategies

There will be 4 hours of lectures, where the theory will be covered and multiple examples demonstrated. Each week there will also be a tutorial based on the previous weeks lecture.

### Module Assessment Strategies

The learning outcomes may be assessed by laboratory reports or assignments, plus assessments at various times during the semester plus an end of semester examination

### Repeat Assessments

Repeat assessment will be by way of sitting another examination on the subject. Alternatively, at the discretion of the lecturer, assignments covering the deficient areas of the course may be set.

### Module Dependencies

Prerequisites
ENG06026 201300 Engineering Mechanics

### Indicative Syllabus

1. Revision of Engineering Mechanics
2. Compound bars, calculation of stress and amount of deformation experienced by each material
3. What is a shear?, Shear force, shear stress, shear strain, Poisson's ratio.
4. Shear force and bending moment diagrams, what they are and how to draw and interpret them, and how they relate to bending stresses.
5. Hoop stress in thin walled pressure vessels and in thin rotating rings.
6. Use of the formula for torsion in solid shafts and tubular shafts.
7. Centrifugal forces in different situations.
8. Thermal strain.

Indicative practicals.

1. Tutorials as required
2. Tensile tests for various materials, perhaps include compound bars.

3. MDSolids demonstration and exercises especially for bending moment and shear force diagrams.

### Coursework & Assessment Breakdown

Coursework & Continuous Assessment
30 %
End of Semester / Year Formal Exam
70 %

### Coursework Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Weekly tutorials Continuous Assessment Open Book Exam 30 % OnGoing 1,2,3,4,5,6,7

### End of Semester / Year Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Final Exam Terminal exam Final Exam UNKNOWN 70 % End of Term 1,2,3,4,5,6,7

### Full Time Mode Workload

Type Location Description Hours Frequency Avg Workload
Lecture Lecture Theatre Lecture 4 Weekly 4.00
Tutorial Engineering Laboratory Tutorial / demonstrations 1 Weekly 1.00
Independent Learning UNKNOWN Revision 2 Weekly 2.00
Independent Learning UNKNOWN Reading as recommended by lecturer 1 Weekly 1.00
Independent Learning UNKNOWN Solutions of exercises set by the lecturer during the weekly lecture for the follwoing lecture 1 Weekly 1.00
Total Full Time Average Weekly Learner Contact Time 5.00 Hours

### Module Resources

Non ISBN Literary Resources
 Authors Title Publishers Year Hughes E &  Hughes C Engineering Science Longman Scientific & Technical 2006 Meriam J & Kraige L Engineering Mechanics: Statics Wiley 2003 Hannah & Hiller Applied Mechanics Longman Scientific & Technical 1995 Roy R Craig Mechanics of Materials Wiley 2011
Journal Resources

N/A

URL Resources

N/A

Other Resources

MDSolids software on pcs in the engineering computer classes