mechanic engineering

Post on 08-Jul-2016

215 views

Category:

Documents

Embed Size (px)

DESCRIPTION

new lecture note

TRANSCRIPT

• VDB1023

Engineering Mechanics

Lecturer

Dr Zubair Imam Syed

Email: imam.syed@petronas.com.my

Ph: 05 368 7313

Room: 14.03.13

• Lectures Monday 4:00-5:00 pm Building 14-02-07Friday 8:00-10:00 am Building 14-02-07

Tutorials Tuesday 8:00-10:00 am Building 21-01-07Thursday 12:00-2:00 pm Building 13-01-06

Course Learning OutcomesAt the end of this course, students should be able to:

1. Resolve a system of forces and apply the equilibrium conditions2. Solve problems involving simple trusses and friction3. Calculate the geometrical properties of simple and complex areas and solids4. Analyze the dynamics of a rigid body

Course involvement time:

Assessment:3 Assignments 15%3 Quizzes 15%2 Tests 20% Final Examination 50%

• Course OutlineWk dates Topic CLO Activities

1 Topic -1: Statics of a Particle

Fundamental concepts; Unit of measurement Force vector, Vector operations; Position vector Condition of Equilibrium; Free-Body Diagram Coplanar Force Systems; Moment of a Force; Principle of

Moments; Moment of a Couple Equivalent System; Resultants of a Force and Couple System

CLO1

2

3Tutorial 1Assign-1

4 Topic -2: Equilibrium of a Rigid body

Free-Body Diagrams, Equations of Equilibrium in Two and Three Dimensions

Application of Equations of Equilibrium

Topic -3: Trusses and Friction Simple Trusses, The Method of Joints, The Method of Sections

CLO1

CLO2

Tutorial 2

5Tutorial 3 Quiz

1

6Tutorial 4Quiz 2

7Assign-2

Test 1 8 Topic -3: Trusses and Friction (Contd)

Characteristics of Dry Friction, Problems Involving dry FrictionCLO2

9Topic -4: Geometric Properties of Areas and Solids

Centre of Gravity, Centroid, Composite Bodies, Theorems of Pappus and Guldinus

Moments of Inertia, Product of inertia, Radii of Gyration, Parallel-Axis Theorem

Test 2 on Topic 3 and 4CLO 3

Tutorial 5Quiz 3

10 Tutorial 6

11Tutorial 7Assign-3

• Acquire and apply engineering fundamentals to complex civil engineering problems.

Identify, formulate and solve complex civil engineering problems using creativity and

innovativeness.

Design and develop solutions for complex civil engineering problems.

Investigate complex civil engineering problems using research based knowledge and methods.

Utilize modern tools to evaluate complex civil engineering activities.

Demonstrate the understanding of the legal, health & safety, social and cultural responsibilities

of a professional engineer.

Demonstrate the principles of entrepreneurship, sustainable design and development.

Apply professional ethics and responsibilities in civil engineering practice.

Communicate effectively with all levels of industry and society on complex civil engineering

activities.

Perform effectively in multi-disciplinary settings as an individual and in a team with the capacity

to be a leader or manager.

Recognize, acquire and undertake an independent and lifelong learning in continual

technological development.

Demonstrate and apply engineering management and economic principles in multidisciplinary

environments as an individual or as a leader in a team.

Civil Engineering Programme Outcomes (PO)

• VCB1023 ENGINEERING MECHANICS PO1 PO2

CLO1 Resolve a system of forces and apply the equilibrium conditions. 40

CLO2 Solve problems involving simple trusses and friction. 25

CLO3Calculate the geometrical properties of simple and complex areas

and solids.20

CLO4 Analyze the dynamics of a rigid body. 15

55 45 100

VCB1023 ENGINEERING MECHANICS CO1 CO2 CO3 CO4 TOTAL

15

QUIZ 1 5 5

QUIZ 2 5 5

QUIZ 3 5 5

15

ASSIGNMENT 1 5 5

ASSIGNMENT 2 5 5

ASSIGNMENT 3 5 5

20TEST 1 10 10

TEST 2 5 5 10

50

FEQ 1 10 10

FEQ 2 10 10

FEQ3 10 10

FEQ 4 10 10

FEQ 5 10 10

100 40 25 20 15 100

MAPPING TO PO/CLO

ASSESSMENT MAPPING TO CLO

• Main Reference:

Hibbeler, R.C., (2010), Engineering Mechanics Statics, SI Version, Prentice Hall.

Hibbbeler, R.C., (2010), Engineering Mechanics Dynamics, SI Version, Prentice Hall.

Timoshenko, Young and Rao (1995), Engineering Mechanics, McGraw Hill

Beer et al. (2012), Vector Mechanics for Engineers: Statics and Dynamics, McGraw-Hill

References

• Introduction

What is Engineering Mechanics?

• What is Civil Engineering, anyway?

What I will be doing when I become a Civil Engineer?

Why I wanted to be a Civil Engineer?

• Why are they standing?

How were they designed and build?

• Techgenltd.com

• Where you could be working as a

Civil Engineer?

Consultancy/ Construction/ Planning and

Designing/ Industries like oil and gas company,

institution/

research institution/ sales/

• Physics

Mechanics

Statics Dynamics

Kinematics Kinetics

Thermodynamics Electricity

Mechanics Knowledge branch

• Mechanics :

- Rigid-body Mechanics

- Deformable-body Mechanics

- Fluid Mechanics

Rigid-body Mechanics :

- Statics

- Dynamics

Quantum mechanics

• Statics

deals with effect of force on bodies which are not moving

Dynamics

deals with force effect on moving bodies

We will be studying the effect of force on objects (rigid-

bodies) in this subject.

So, Why is it important to study the effect of

forces on objects?

• Why do objects move as they do?

Why do objects remain in rest as they do?

Newtons Laws

What happening when the Dad pushes the swing forward once?

What are the action of forces we can identify around us?......Think!

• 1st Law 1: An object persists to be in its original state unless acted upon by an external force.

2nd Law: The acceleration of a body is directly proportional to the net applied force. F = ma.

3rd Law: Every action has an equal and opposite reaction.

Refreshing memory

Newtons Laws

• Primitive concepts

Space

Time

Mass

Force

Scalar

Vector

Refreshing memory

Is Weight scalar or vector?

• Units:Parameter Notation Unit (SI)

Mass M kilogram kgLength L meter mForce F Newton N

[ kg.m /s2]Time T second s

Refreshing memory

Dimensional Homogeneity:

Always use consistent units. Each term used in a physical process must be expressed in the same units.

Units to be used:

• Some points to note when using SI units:

No Plurals (e.g., m = 5 kg not kgs )~might be confused with second(s)

Separate Units with a dot (e.g., meter second=m s )

Most symbols are in lowercase ( some exception are N, Pa, M and G)

Exponential powers apply to units , e.g., cm2 = cm cm

Three of the kinetic units, referred to as basic units,

may be defined arbitrarily. The fourth unit, referred to

as a derived unit, must have a definition compatible

with Newtons 2nd Law,amF r

v=

• Learning Steps

Understand, Visualize, Analysis

Outcome based Education (OBE) !!!!

• Course Learning Outcomes

At the end of this course, students should be able to:

1. Resolve a system of forces and apply the equilibrium conditions

2. Solve problems involving simple trusses and friction3. Calculate the geometrical properties of simple and

complex areas and solids4. Analyze the dynamics of a rigid body

• Reference Texts

Main Texts1. Hibbeler, R.C., (2010), Engineering Mechanics Statics, SI Version, Prentice Hall.2. Hibbeler, R.C., (2010), Engineering Mechanics Dynamics, SI Version, Prentice Hall.

Additional Texts 3. Timoshenko, Young and Rao (1995), Engineering Mechanics, McGraw Hill4. Beer et al.(2012), Vector Mechanics for Engineers: Statics and Dynamics, McGraw-Hill

UTP attendance policy:

Students who are absent for more than 10% total hours of any course without prior written permission may be barred from sitting for the examination in that course.

Assessment Component Percentage of Marks

3 Assignments+ 3 Quizzes 30%2 Tests 20%

Final Exam 50%

• E-learning Class lectures will be regularly

this subject will be posted on e-learning

Communication

Students expectation

Lecturers expectation

• Summary

Any questions?

Background of Civil Engineering

Background of Engineering Mechanics

Refreshing our memories on some related aspects

• Introduction And Review of Mathematics

MURPHY's Laws

1. Nothing is as easy as it looks.2. Everything takes longer than you think.3. Anything that can go wrong will go wrong.4. If there is a possibility of several things going wrong, the one that will cause the most damage will be the one to go wrong. Corollary: If there is a worse time for somethingto go wrong, it will happen then.5. If anything simply cannot go wrong, it will anyway.6. If you perceive that there are four possible ways in which a procedure can go wrong, and circumvent these, then a fifth way, unprepared for, will promptly develop.7. Left to themselves, things tend to go from b