# DYNM08004 2019 Mechanics 401

### General Details

Full Title
Mechanics 401
Transcript Title
Mechanics 401
Code
DYNM08004
Attendance
75 %
Subject Area
DYNM - Dynamics
Department
MENG - Mech. and Electronic Eng.
Level
08 - NFQ Level 8
Credit
05 - 05 Credits
Duration
Semester
Fee
Start Term
2019 - Full Academic Year 2019-20
End Term
9999 - The End of Time
Author(s)
Sean Dalton
Programme Membership
SG_EMECL_K08 201900 Bachelor of Engineering (Honours) in Mechanical Engineering
Description

This Mechanics module expands the analysis tools developed in year 3 enabling students to solve deflection problems under more varied loading condition. This model also takes analysis beyound the limits of elastic behaviour for the first time, by applying a analytical treatment to plastic behaviour. Application of strain gauges will be expanded to full complex loading with the use of strain gauges rosettes.

### Learning Outcomes

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

1.

Solve beam deflection for any combination of conc.  and UDL loads.

2.

Solve thick cylinder problem including stresses induced by interference fits

3.

Solve bending and torsion problems where loads cause plastic behaviour.

4.

Find stresses from strain rosette data for parts under complex loads.

5.

Identify different modes of failure and solve fatigue failure problems

6.

Solve problems using energy methods and Finite Element Analysis

### Module Assessment Strategies

Final Exam (70%) / Continuus assessment (30%)

### Indicative Syllabus

Slope and deflection of beams. Slope and deflection of beams for general load cases using McCauley’s method. Moment area method.

Lateral Shear stress: Shear stress distribution in beams, Unsymmetrical loading of thin walled members. Shear centre.

Thick cylinders, Mathematical and graphical solution of stresses Single / compound cylinders, due to pressure, interference fit pressure, and interference overlap. Determination of Assembly force and torque.

Elastic plastic behaviour, Elastic Plastic bending, Elastic Plastic torsion, Plastic hinge, Residual stresses.  Plastic Yielding of a pressurised cylinder.

Complex strains:  Strain-stress relationship bi-axial loading, Elastic constants relationships, Plane stress/Plane strain, Complex strains, Mathematical/graphical solution of Strain gauges.

Fatigue: Overview of failure modes, Solving fatigue failure problems using Gerber, Soderberg and Goodman theories. Fatigue stress concentration factors. Cumulative damage, Fatigue testing: combating fatigue.

Strain energy in direct loading, shear, bending and torsion. Strain energy per unit volume. Castiglianos theorem.

Unsymmetrical Bending: Principal second moments of area, Mohrs circle for second moments of area, stresses induced in unsymmetrical sections.

Matrix solution of problems: Matrix solution of direct stress and torsion problems, matrix solution of frameworks. Computer analysis of problems.

Finite element analysis theory, Element types and capability. Strain displacement relations for simple spring elements. Equilibrium, boundary conditions, stiffness matrices. Analysis of a 2d truss. Problem solving using finite element analysis software.

### 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 Continuous Assessment : assessments/practicals Continuous Assessment Assessment 30 % OnGoing 1,2,3,4

### End of Semester / Year Assessment

Title Type Form Percent Week Learning Outcomes Assessed
1 Final Exam: Final Exam Closed Book Exam 70 % End of Term 1,2,3,4,5,6

Type Location Description Hours Frequency Avg Workload
Lecture Flat Classroom Mechanics / Dynamics Lectures 4 Weekly 4.00
Tutorial Flat Classroom Tutorial 2 Fortnightly 1.00
Independent Learning UNKNOWN Private Study 3 Weekly 3.00
Total Full Time Average Weekly Learner Contact Time 5.00 Hours

### Module Resources

Non ISBN Literary Resources

Mechanics of Materials (E.J. Hearne) Elsevier

Mechanics of Material (R. C. Hibbeler) Prentice hall

Other Resources

MD Solids Software

Working Model software

Finite element analysis software (Solidworks/Ansys)