STRENGTH OF MATERIALS | Lectures, Self Study & Quiz | Diploma Mechanical



 

Course Title: STRENGTH OF MATERIALS

Scheme (L:T:P) : 4:0:0

Total Contact Hours: 52

Course Code:

15ME31T

Type of Course: Lectures, Self Study & Quiz

Credit :04

Core/ Elective:

Core

CIE- 25 Marks                                                                                                          SEE-100 Marks

 

Prerequisites: Knowledge of basic mathematics and Science.

Text Box: Course Objectives: It aims at enabling the student to understand & analyze various types of loads, stresses & strains along with main causes of failure of machine parts.

 

1.     The subject is pre-requisite for understanding principles of Machine design.

2.     Understanding the mechanical properties of materials will help in selecting the suitable materials for various engineering applications

On successful completion of the course, the students will be able to attain CO:

 

Course Outcome

CL

Linked PO

Teaching Hrs

 

 

CO1

Understand                  and                  distinguish       the behavior   of                     simple               load                  carrying

members subjected to an axial, shear, and thermal Loading.

 

R/U/A

 

1,2,3,9

 

14

 

 

CO2

Interpret the Variation of the moment of inertia for different Mechanical Engineering Sections such as fly

wheel

 

R/U/A

 

1,2,4,9

 

10

 

 

CO3

Draw and Compare the shear force and bending moment diagram on beams under varying load conditions.

 

R/U/A

 

1,2,4,9

 

12

 

CO4

Assess Bending and shear stresses in

beams subjected to different loadings for different machine parts

 

R/U/A

 

1,2

07

 

C05

Differentiate in strain energy stored in a body when the load is suddenly

applied and gradually applied

 

U/A

 

1,2

03

 

 

C06

Design simple solid and hollow shaft for power transmission keeping view of Environmental and sustainability aspects

 

R/A

 

1,2,6

 

06

 

 

Total sessions

52

Legend: R; Remember, U: Understand A: Application


COURSE-PO ATTAINMENT MATRIX

 

Course

Programme Outcomes

1

2

3

4

5

6

7

8

9

10

STRENGTH OF MATERIALS

3

3

1

3

-

1

-

-

3

-

 

Level 3- Highly Addressed, Level 2-Moderately Addressed, Level 1-Low Addressed.

The method is to relate the level of PO with the number of hours devoted to the COs which address the given PO. If >40% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 3

If 25 to 40% of classroom sessions addressing a particular PO, it is considered that the PO is addressed at Level 2 If 5 to 25% of classroom sessions addressing a particular PO, it is considered that the PO is addressed at Level 1

If < 5% of classroom sessions addressing a particular PO, it is considered that the PO is considered not-addressed.

 

 

COURSE CONTENT AND BLUEPRINT OF MARKS FOR SEE

 

Unit No

 

Unit Name

Hour

Questions to be set for SEE

Marks weightage

the weightage (%)

R

U

A

 

 

1

SIMPLE STRESSES AND STRAINS

14

05

05

20

30

21

2

MOMENT OF INERTIA

10

05

05

20

30

21

3

SHEAR FORCE AND BENDING MOMENT

12

05

05

20

30

21

4

THEORY OF SIMPLE BENDING

07

05

05

20

30

21

5

STRAIN ENERGY AND IMPACT LOADING

03

-

05

05

10

06

6

TORSION OF CIRCULAR SHAFT

06

05

--

10

15

10

 

Total

52

25

25

90

145

100

Legend: R; Remember, U: Understand A: Application

 

Text Box: UNITI: SIMPLE STRESSES AND STRAINS	14 Hrs

 

Simple stresses & strains viz. tensile, compressive, Shear, Crushing, Thermal stresses, & corresponding strains,Hook’s Law –Problems on Direct Stress & Linear Strain- Stress-Strain curve for Ductile material and Brittle material with all parameters.- Factor of Safety. Elastic Constants - Lateral Strain ,Poisson’s ratio, Bulk Modulus, Shear Modulus ,Volumetric Strain- The relation between elastic constants- Problems on elastic constants. Hoop stress-Longitudinal Stress in thin cylindrical & spherical shells subjected to internal pressure.-Problems on thin cylindrical shells.

Text Box: UNITII: MOMENT OF INERTIA	10Hrs

 

Centre of Gravity, Moment of Inertia & its Importance -Parallel & Perpendicular Axis Theorem-C.G of Rectangle, Triangle, Circle, Semi-circle, Trapezium, Cone-Problems on


finding CG of T-Section, I-Section, L-Section, Channel-Section. Moment of Inertia of solid &Hollow sections like Rectangle, Triangle, Circle- Moment of Inertia about C.G for I section, T section. L-section and Channel Section.

 

 

 

Text Box: UNTIII: SHEAR FORCE AND BENDING MOMENT DIAGRAMS	12Hrs

Definition - Shear Force and Bending Moment –Types of beams, types of the load acting on

beams ,Sagging & Hogging Bending Moment and its importance –sign convention to draw SFD and BMD- Concept of Maximum bending moment, Point of Contra flexure & its importance-Drawing S.F & B.M Diagram for Cantilever, Simply Supported  Beams  subjected to Point Load and U.D.L

Text Box: UNIT IV:THEORY OF SIMPLEBENDING	07Hrs

 

Introduction, assumptions in theory of simple bending.-Bending stress, relation between bending stress & radius of curvature (without proof).-Position of neutral axis, moment of resistance-Bending equation (without proof)-Modulus of section for rectangular, hollow rectangular and hollow circular sections-Beams of uniform Strength-problems

Text Box: UNIT V: STRAIN ENERGY AND IMPACT LOADING	03Hrs

 

Introduction -Strain Energy-Types of loading-Sudden, Gradual & Impact Load-resilience, proof resilience and modulus of resilience-Equation for strain energy stored in a body when the load is gradually applied and suddenly applied – problems.

Text Box: UNIT VI: TORSION OF CIRCULAR SHAFT	06Hrs

 

Introductionto Torsion , Angle of Twist , Polar Moment of Inertia , Torsion equation- (without proof)-Assumptions in theory of Torsion -Power Transmitted by a shaft, axle of solid and hollow sections subjected to Torsion - Comparison between Solid and Hollow Shafts subjected to pure torsion- Problems. (No problem on composite and non homogeneous shaft)

®TEXT BOOKS

1.     Ramamurtham. S., “Strength of Materials”, 14th Edition, Dhanpat Rai Publications, 2011

2.     Khurmi R S, “Applied Mechanics and Strength of Materials”, 5 Edition, S.Chandand company

 

REFERENCES

1.       Popov E.P, “Engineering Mechanics of Solids”, 2nd Edition, Prentice-Hall of India, New Delhi, 2002.

2.       Nash W.A, “Theory and problems in Strength of Materials”, Schaum Outline Series, McGraw-Hill Book Co., New York, 1995.


3.       Kazimi S.M.A, “Solid Mechanics”, Tata McGraw-Hill Publishing Co., New Delhi, 2003.

4.       Ryder G.H, “Strength of Materials”, 3rd Edition, Macmillan India Limited, 2002.

5.       Bansal R. K, “Strength of Materials”, Laxmi Publications, New Delhi, 2012.

6.       Timoshenko S.P, “Elements of Strength of Materials”, Tata McGraw-Hill, Delhi,

 

 LIST OF SOFTWARE/LEARNING WEBSITES                                                                                                     

1.   www.nptel.iitm.ac.in/courses/.../IIT.../lecture%2023%20and%2024htm

2.   www.wikipedia.org/wiki/Shear_and_moment_diagram

3.   www.freestudy.co.uk/mech%20prin%20h2/stress.pdf

4.   www.engineerstudent.co.uk/stress_and_strain.html

5.   https://www.iit.edu/arc/workshops/pdfs/Moment_Inertia.pdf

 

 SUGGESTED LIST OF STUDENT ACTIVITYS                                                                                                     

 

Note: The following activities or similar activities for assessing CIE (IA) for 5 marks (Any one).

 

1.                        Each student should do any one of the following type activity or any other similar activity related to the course and before conduction, get it approved from concerned Teacher and HOD.

2.                         Each student should conduct different activity and no repeating should occur

 

1

Calculate Moment of Inertia of Fly Wheel of engine present in your laboratory

2

Market Survey specific to properties of Various type of Materials used in Mechanical

Engineering and make report

3

Compare the strength of solid shaft with that of hallow shaft for same power

transmission for an automobile and make report

 

 Course Delivery:                                                                                                     

å   The course will be delivered through lectures and Power point presentations/ Video.


       å   MODEL OF RUBRICS /CRITERIA FOR ASSESSING STUDENT ACTIVITY     

RUBRICS FOR ACTIVITY( 5 Marks)

 

Dimension

Unsatisfactory

Developing

Satisfactory

Good

Exemplary

Student Score

1

2

3

4

5

 

Collection of data

Does not collect any information relating to the topic

Collects very limited information; some relate to

the topic

Collect much information; but very limited relate

to the topic

Collects some basic information; most refer to

the topic

Collects a great deal of information; all refer to

the topic

Ex: 4

Fulfill team’s roles & duties

Does not perform any duties assigned to the team role

Performs very little duties but unreliable.

 

Performs very little duties

Performs nearly all duties

Performs all duties of assigned team roles

 

 

5

 

Shares work equally

 

Always relies on others to do the work

Rarely does the assigned work; often needs reminding

Usually does the assigned work; rarely needs reminding

 

Normally does the assigned work

Always does the assigned work without having to be reminded.

 

 

3

 

Listen to other Team mates

 

Is always talking; never allows anyone else to speak

Usually does most of the talking; rarely allows others to speak

Talks good; but never show interest in listening others

 

Listens, but sometimes talk too much

 

Listens and speaks a fair amount

 

 

2

Average / Total marks=(4+5+3+2)/4=14/4=3.5=4

 

Note: This is only an example. Appropriate rubrics/criteria may be devised by the concerned faculty (Course Coordinator) for assessing the given activity.

Course Assessment and Evaluation Scheme:

 

What

To

who m

When/Where

(Frequency in the course)

Max Marks

Evidence collected

Course outcomes

Direct Assessment

CIE

IA

 

 

 

Three IA tests (Average of three tests will be

computed)

 

20

 

Blue books

 

 

1,2,3,4,5,6

Student activities

05

Report/Log of

activity

SEE

End

Exam

End of the course

100

Answer scripts

at BTE

1,2,3,4,5,6

Indirect Assessment

Student

Feedback on course

 

 

 

Middle of the course

 

Feedback forms

1 & 2,3 Delivery of course

End of Course Survey

End of the course

 

 

 

Questionnaires

1,2,3,4,5,6

Effectiveness of Delivery of instructions &

Assessment Methods

Note: I.A. test shall be conducted for 20 marks. Average marks of three tests shall be rounded off to the next higher digit.


Note to IA verifier: The following documents to be verified by CIE verifier at the end of semester

1.     Blue books( 20 marks)

2.     Student suggested activities report for 5 marks and should be assessed on RUBRICS

3.     Student feedback on course regarding the Effectiveness of Delivery of instructions & Assessment Methods.


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