1st module.pdf

Amity School of Engineering & Technology

MECHANICAL ENGINEERING

ELEMENTS OF


2

EME (BTECE103)

Usefulness, Significance

Introduction, Orientation

Syllabus, Books, Class policy

Learning target/objective

Science of Teaching (Pedagogy)


3 MECH+CSE+ECE


4

Syllabus

04 module, 15 week, 31h (25 actual)

Delivery

Lesson plan, Methods, & Books

Science of teaching (Pedagogy)

Read, Note, Study, Revise, Demand


5

Syllabus

Module I : Fundamental Concepts

Module II : Stress & Strain Analysis

Module III: Castings & Forgings

Module IV: Welding, Sheet metal

15 weeks, 31h (25 practically)


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M I: Fundamental Concepts Definition Thermodynamics, system, surrounding and universe, phase, concept of continuum, macroscopic & microscopic point of view, Thermodynamic equilibrium.


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Module I: Fundamental Concepts Therm. Dyn. equilibrium, property, state, path, process, cyclic process, Zeroth, first/second law of thermo dynamics, Carnot Cycle, Introduction to I.C. Engines two & four stoke S.I. and C.I. engines. Otto cycle, Diesel cycle.


8

Module II: Stress & Strain Analysis

Simple stress & strain introduction, normal shear, and stresses-strain diagrams for ductile and brittle materials. Elastic constants, one-dimensional loadings of members of varying cross-section, Strain Energy,


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Module II: Stress & Strain Analysis

Properties of material-strength, elasticity, stiffness, malleability, ductility, brittleness, hardness and plasticity etc; Concept of stress and strain, stress strain diagram, tensile test, impact test and hardness test.


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Module III: Castings & Forgings Introduction of casting, pattern, mould making procedures, sand mould casting, casting defects, allowances of pattern. Forging-introduction, upsetting & drawing out, drop forging, press forging & machine forging.


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M IV: Welding & Sheet metal working

Introduction of welding processes, classification, gas, arc, and resistance welding.

Introduction to sheet metal shop, Shearing, trimming, blanking, piercing, shaving, notching, stretch forming, nibbling coining, embossing and drawing.


12

Text Book & Reference

Engineering thermodynamics, by P.K. Nag,

Thermal Engineering, by D.S. Kumar.

Thermal Engineering by PL Ballaney

Engineering Thermodynamics: Work and Heat Transfer, by Rogers and Mayhew, Heine, R.W. C.R. Loper and P.C. Rosenthal,


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Text Book & Reference

Principles of metal casting Welding Technology by R.S. Parmar,

Thermodynamics and Heat Engines Volume-I, by R. Yadav

Internal Combustion Engine, Ganesan V.

I.C. Engine, Mathur, M.L. and Sharma R.P.


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Compo-nents

A CT S/V/Q HA EE

Weigh- tage (%)

5 10 8 7 70

Examination Scheme: CT: Class Test, HA: Home Assignment, S/V/Q: Seminar/Viva/Quiz, EE: End Semester Examination; Att: Attendance Examination Scheme: Examination Scheme: Examination Scheme:

Examination scheme

CT: Class Test, HA: Home Assignment, S/V/Q: Seminar/Viva/Quiz, EE: End Semester Examination; Att: Attendance

Attendance , Class Test, Home Assignment,

Seminar/Viva/Quiz, End Semester Exam.


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Discipline

Response, In-time, Self management

Lecture Notes in class

Date, Time, No., Half to two page.

Separate Notebook 4each subject.

Performance best of all

Involve, Plan, Study, Evaluate, Improve


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Lesson plan (27th Aug to 19th Dec 14)

04 Module, 15 week, 31h (25 effective)

Module I 06 sessions (1 evaluation)

Module II 07 sessions (2 evaluation)

Module III 05 sessions (1 evaluation)

Module IV 05 sessions (1 evaluation)

Numerical 03 sessions (all revision)


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UNIVERSAL

VERTICAL

LAUNCHER

Fundamental Concepts

HEAT creating FORCE


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NEXT CLASS

Fundamental Concepts Thermodynamics, system,

surrounding, universe, phase, concept of continuum

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Thermodynamics is a Greek word which means flow of heat in physical and chemical reactions.

Thermodynamics is a branch of science which deals with study of different forms of energy and their interconversions.

It deals with energy changes in physical and chemical processes.


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Useful to predict whether any chemical reaction can occur under specified conditions

Helps to predict the extent of chemical reaction before equilibrium is reached

Used to derive important laws like Law of equilibrium


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Classical Thermodynamics

Continuum mechanics

Quantum Thermodynamics

Discretely quant mechanics

Statistical Thermodynamics

Statistical science/mechanics

Bulk

Mol

Average

Terms used in Thermodynamics

System

May be defined as the part of universe selected for thermodynamic consideration i.e. to study the effect of temperature, pressure etc.

It may also be defined as specified part of universe in which energy changes are taking place.


Surrounding

The remaining portion of universe excluding the system is called Surrounding

Universe = System + Surrounding

The System and Surrounding can be separated by real and imaginary boundary


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Thermodynamic System

1. Closed system

2. Open system

3. Isolated system

Types of system


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Matter Quantity

Region Space

Boundary Fix/Moving

Surrounding External

Environment



26 Types of System

Mass Fixed

Closed System

Mass Transfer

No

Energy

Transfer

Yes


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Mass Not Fixed

Open System

Mass Transfer

Possible

Energy Transfer

Possible


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Isolated

System

Mass Fixed No Mass Transfer

No Energy

Transfer

Thermodynamic Equilibrium


Closed System

Open System

Isolated System

m zero Non Fixed No m/E


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Mass, Energy

Space, Region

Environment


30 Properties: Macro & Microscopic

Physical Condition Macroscopic

Definite State, Change of State

Sucve Path, Process, Cycle

Intensive, Extensive Mass

No Macro Isolated, Equilim

Thermal, Mech, Chem Equilibrium


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M1: Fundamental Concepts

Thermodynamics equilibrium,

Laws of Thermodynamics

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Homogenous System All the con-stituents are in the same phase and composition of system is uniform throughout

Heterogeneous System It contains two or more phases and the composition is uniform throughout

Intensive Properties

Do not depend on size of system or

quantity of matter present in it.

Depend on nature of substance present in it.

Example: pressure, temperature, density, surface tension


Extensive Properties

Depend on the Quantity of matter present in the system

Examples: volume, energy, heat capacity, entropy


State of System

It is the condition of system described in terms of certain measurable parameters such as temperature, pressure, volume, and mass of the system.


Process

It gives the path by which system changes its one state to other.

Isothermal process

Adiabatic Process does not exch-ange heat with the surrounding and is completely insulated from surrounding.

Isochoric Process keeps volume of the system constant during the process.


LAWS OF THERMODYNAMICS

Zeroth law of thermodynamics

1st Law of thermodynamics

2nd Law of thermodynamics

3rd Law of thermodynamics

Zeroth Law of Thermodynamics

When two bodies A and B are

separately in thermal equilibrium

with a third body, they in turn are

in equilibrium with each other.

First Law of Thermodynamics

Energy can neither be created

nor destroyed, it may be

converted from one form to

other. The total energy of an

isolated system remains

constant.

U= q + W U = Internal Energy change

q = heat energy

W = work done

First Law of Thermodynamics

All spontaneous or naturally occurring processes are irreversible.

Without an external source a spontaneous process cannot be reversed thermodynamically

The entropy of an isolated system must increase if it is to be spontaneous

2nd Law of Thermodynamics

S (total) = S system + S surrounding

For non-isolated system the total

energy of both the system and

surrounding must increase or must

be positive.

2nd Law of Thermodynamics

Entropy of all perfectly crystalline solids may be taken as zero at the absolute temperature. At absolute zero a perfectly crystalline solid has a perfect order of its constituent particles i.e. there is no disorder at all. Hence absolute entropy is taken as zero

3rd Law of Thermodynamics

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M1: Fundamental Concepts

Carnot cycle & Internal Combustion (I.C.) Engine

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1st module.pdf

Documents

thermal engineering

stress strain analysis

syllabus module

stress strain diagram

fundamental concepts

strain energy

concept of stress

significance introduction