15ME31T: Strength of Materials Mechanical 3rd Sem Syllabus for Diploma DTE Karnataka C15 Scheme

Strength of Materials detail DTE Kar Diploma syllabus for Mechanical Engineering (General) (ME), C15 scheme is extracted from DTE Karnataka official website and presented for diploma students. The course code (15ME31T), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other mechanical 3rd sem syllabus for diploma c15 scheme dte karnataka you can visit Mechanical 3rd Sem Syllabus for Diploma C15 Scheme DTE Karnataka Subjects. The detail syllabus for strength of materials is as follows.

Pre-requisites:

Knowledge of basic mathematics and Science.

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

Course Outcomes:

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UNIT I: 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 StrainRelation 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.

UNIT II: 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.

UNIT III: SHEAR FORCE AND BENDING MOMENT DIAGRAMS 12Hrs

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UNIT IV: THEORY OF SIMPLE BENDING 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

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 appliedand suddenly applied -problems.

UNIT VI: TORSION OF CIRCULAR SHAFT 06Hrs

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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

Reference Books:

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.Ddf
4. www.engineerstudent.co.uk/stress_and_strain.html
5. https://www.iit.edu/arc/workshops/pdfs/Moment_Inertia.pdf

Suggested List of Student Activities:

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. Eachstudent 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:

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

Model Question Paper:

(CIE)

1. Explain linear and lateral strain 3 MARKS
2. A bar of 30mm diameter is subjected to an axial pull of 80KN. The measured extension is ‘0.1’ mm on a gauge length of 200mm and the change in diameter is ‘0.004mm. Calculate the poison’s ratio and the values of young’s Modulus, bulk modulus and Modulus of rigidity. 7 MARKS
3. A mild steel bar of 15mm diameter was subjected to tensile test. The test bar was found to yield at a load of 90KN and it attains maximum

load of 180KN and ultimately fails at a load of ‘67.5 KN. Determine the following: tensile stress at the yield point, ultimate stress and stress at the breaking point, if the diameter of the neck is ‘7.5mm.
OR
A bar of steel 1m long 50mm wide and 10mm thickness is subjected to an axial load of 10KN in the direction of its length. Find the changes in length, width, thickness and volume.10 MARKS

Model Question Paper:

(SEE)

PART-A(Each questions carries 5 marks)

1. Define bulk Modulus and Shear Modulus
2. Explain thermal stress and Shear Modulus
3. State Parallel and perpendicular axis theorem
4. Locate CG for Triangle Rectangle, Circle, Semi-circle, Trapezium, Cone with the help of plain figure
5. Define Shear force and Bending Moment in beams
6. Explain Point of Contra flexure in a beam
7. List the aassumptions in theory of simple bending
8. Explain Beams of Uniform Strength
9. Explain Strain energy and Resilience

PART-B(Each questions carries 10 marks)

1. A steel rod 30mm x 12.5mm and 500mm long is subjected to a axial pull of 75KN. Determine the changes in length, width and thickness and volume of bar. If young’s modulus is 200KN/mm2.
2. A bar of 30mm diameter is subjected to an axial pull of 80KN. The measured extension is ‘0.1 mm on a gauge length of 200mm and the change in diameter is ‘0.004mm. calculate the poisson’s ratio and the values of young’s Modulus, bulk modulus and Modulus of rigidity.
3. An I section consists of top flange 100 X 30 mm, bottom flange 200 X 40 mm and web 180 X 20 mm. Find the M.I. about an axis passing through C.G. parallel to the base.
4. Calculate M.I. of an angle section 100 X 80 X 10 mm about an axis passing through the centroid and parallel to shorter leg.
5. A cantilever of length 3 m carries a uniformly distributed load of ‘1.5 KN/m for entire length and a point load of 2 KN at a distance of 1 m from the free end. Draw the shear force and the bending moment diagrams for the beam.
6. A simply supported beam of length 5 m carries point loads of 2 KN and 4 KN and 5 KN at a distance of 1 m, 3 m and 4 m from left support. Draw S.F. and B.M. diagrams for the beam.
7. A steel plate is bent into a circular arc of radius 10m.The plate is 100mm wide and 15mm thick, assuming the value of E=2X105 N/mm2.Find the maximum stress induced in the plate and value of bending moment which produced this stress.
8. A simply supported wooden beam of span ‘1.3 m is carrying a central point load of 40 KN. If the allowable bending stress in the timber is taken as 8 N/mm2, find the breadth and depth of the timber. Take b=’0.6d.
1. List the assumptions made in theory of Torsion -5M
2. An axial pull of 25KN is suddenly applied on a steel rod of 3 m long and 900mm2 in cross-sectional area. Calculate the strain energy stored in the rod. Take young’s modulus is 2x105N/mm2. -5M
10. A solid circular shaft is required to transmit 80KW at 160 rpm. The permissible shear stress in the shaft is 60 N/mm2.The maximum Torque transmitted exceeds the mean torque by 20% more than mean torque. The angle of twist is not to exceed 10 in a length of 20 times the diameter of the shaft. The valve of rigidity modulus is ‘0. 8×105 N/mm2.

For detail syllabus of all other subjects of BE Mechanical, C15 scheme do visit Mechanical 3rd Sem syllabus for C15 scheme.

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