ME251

Engineering Design and Graphics

Credits:

  

 

1L-0T-2P-0A (5 Credits)
 

Pre-requisite:


TA101.

Course Content:


Theory of general engineering design, conceptual design, embodiment design, designing to standard, basic sketching, machine drawing, dimensioning as per standards, fits and tolerances, machine elements, assembly drawing, geometrical modeling, and use of CAD software for modeling and animation.

Lecturewise Breakup:


I. Introduction, review of drawing standards (ISS, BS, ASTM), CAD softwares: (1 Lecture)


II. Dimensioning: (1 Lecture)


III. Threaded fasteners / Keys, cotters, pins / Couplings: (1 Lecture)


IV. Bearings / Gears / Shafts: (1 Lecture)


V. CAD and Geometrical modeling: (2 Lectures)


VI. Principles of assembly: (2 Lectures)


VII. Fits and Tolerances: (2 Lectures)


VIII. Design Process, conceptual design, embodiment design with examples of engineering systems and products: (3 Lectures)


Laboratory sessions:


I. Basic review of machine part drawing.


II. Sections.


III. Auxiliary projections.


IV. Threaded fasteners.


V. Couplings.


VI. Gears, shafts.


VII. Bearings.


VIII. Assembly drawings.


IX. CAD 1.


X. CAD 2.


XI. CAD 3.


XII. CAD 4.


XIII. Reverse engg. (CAD modeling / animation).


XIIIV. Reverse Engg (CAD modeling/animation).


References:

  1. Machine Drawing by Ajeet Singh, Mc Graw Hill

  2. Machine Drawing by N.D. Bhatt and V.M. Panchal, Charotar Publications.
 

ME321

Introduction to Elasticity

Credits:

  

 

3L-0T-0P-0A (9 Credits)
 

Objectives


The objective of the course is to equip students with the capability of solving boundary value problems in small deformation linear elasticity and thermoelasticity using various mathematical methods involving direct solution and energy minimization techniques. This course has ESO202 (Mechanics of Solids) as a prerequisite.

Course content


Vector and tensor calculus; Concept of strain; Concept of stress; Equilibrium; stress-strain relationship; Boundary value problem of linear elasticity; Plane stress and plane strain problems; Axisymmetric problems; Torsion of non-circular sections; Contact problems; Wedge problems; Exposure of 3-d problems in elasticity; Energy methods; Special topics.

Total number of lectures: 40

Lecturewise breakup


1. Tensor algebra and calculus: 3 Lectures

2. Strains: 3 Lectures

  • Concept of strain, derivation of small strain tensor and compatibility

3. Stress: 3 Lectures

  • Concept of stress, Cauchy stress, equilibrium and equations, principal stresses and directions

4. Constitutive equations: 2 Lectures

  • Generalized Hooke’s law including thermoelasticity, material symmetry

5. Formulation of the bvp in linear elasticity including: 2 Lectures

  • Concepts of uniqueness and superposition, 2-d plane stress and plane strain problems.

6. Introduction to governing equations in cylindrical and spherical coordinates, axisymmetric problems: 2 Lectures

7. Curved beams: 3 Lectures

8. Torsion of non-circular cross sections: 3 Lectures

9. Contact problems in 2-d: 4 Lectures

10. Problems on wedges and crack tip fields: 3 Lectures

11. 3-d problems by potential/Fourier-transformation methods: 4 Lectures

12. Energy methods: 4 Lectures

13. Special topics (to be decided by the instructor, e.g., fracture, contact mechanics, wave propagation in solids, etc.): 4 Lectures

Recommended books

    1. Barber, Elasticity, Springer (3rd Edition), 2010

    2. Slaughter, The Linearized Theory of Elasticity, Birkhäuser, 2002

    3. Bower, Applied Mechanics of Solids, CRC Press, 2009

    4. Saad, Elasticity: Theory, Application and Numeric, Academic Press, 2004

    5. Landau and Lifshitz, Theory of Elasticity (3rd Edition), Butterworth-Heinemann, 1984

    6. Lurie, Theory of Elasticity, Springer, 2005

Proposing instructors: Dr. S. Basu, Dr. A. Gupta, Dr. U. Roy
 

ME354

Vibration and Control

Credits:

  

 

3L-0T-0P-0A (9 Credits)
 

Objectives


The course is designed as a compulsory course to give the students a broad understanding of vibrations and control of mechanical systems. The course will introduce the students to the concepts of vibrations in single and multi-degree of freedom systems, approximate methods and classical control theory. The course will also include brief discussions on vibrations of continuous systems

Course content


Introduction to modeling of dynamical systems including models for damping. Single Degree of Freedom Systems – Free undamped vibration, Free damped vibration, Forced vibration, Transmissibility, Convolution method and its application to finite-duration shock inputs. Two Degree of Freedom System – Free and forced vibrations, vibration absorber. Multi Degree of Freedom Systems (undamped and proportional damping) – Matrix methods, Modal analysis. Approximate Methods. Vibration of continuous systems (free vibration only). Introduction to controls. Review of Laplace transforms. Transfer function, Block diagrams, Stability – Routh-Hurwitz criterion, Controller performance and types. Steady state errors and constants. Types of feedback control systems – Derivative error compensation, Integral error compensation, Proportional error compensation, Root locus method, Bode plots, Nyquist plots. Modern control/Digital control (time permitting)

Total number of lectures: 40

Lecturewise breakup


1. Introduction – modelling of dynamical systems including models for Damping

2. Vibrations of single degree of freedom systems – Free undamped, free damped, Forced vibration, Transmissibility, Convolution method

3. Two Degree of Freedom System – Free and forced vibration, vibration absorber

4. Multi Degree of Freedom Systems (undamped and proportional damping) – Matrix methods, Modal analysis

5. Approximate methods – Rayleigh-Ritz method : 1 Lecture

6. Vibration of continuous systems (free vibration only): 2 Lectures

7. Introduction to controls, review of Laplace transforms: 2 Lectures

8. Transfer functions and Block diagrams, Overall transfer function, Stability – Routh-Hurwitz criterion

9. Controller performance and types. Steady state errors and constants: 2 Lectures

10. Types of feedback control systems – Derivative error compensation, Integral error compensation, Proportional error compensation. (PID controllers) and relation performance

11. Root locus method. Frequency domain Analysis: Bode plots, Nyquist 5,2 plots. Modern control/ Digital control: 2 Lectures

Recommended books

    1. Theory of Vibrations. W. T. Thomson, Prentice Hall

    2. Control Systems Engineering. N. S. Nise, John Wiley & Sons

    3. Vibration Problems in Engineering. W. Weaver, S. P. Timoshenko and D. H. Young, John Wiley & Sons

    4. Mechanical Vibration. J. P. Den Hartog, Dover Publications

    5. Feedback Control of Dynamic Systems. G. Franklin, J. D. Powell, and A. Emami-Naeini, Prentice Hall

    6. Modern Control Engineering. K. Ogata, Prentice Hall

Any other remarks

There should be follow up courses on vibrations of continuous systems as well Statefeedback /Modern advanced controls

Proposing instructors: Dr. A. Chatterjee, Dr. S. S. Gupta, Dr. P. Wahi, Dr. A. Mimani
 

ME222

Nature and Properties of Materials

Credits:

  

 

2L-0T-0P-0A (6 Credits)
 

Objectives


This compulsory course is designed to give the undergraduate students a broad understanding of common materials related to mechanical engineering with an emphasis on the fundamentals of structure-property-application relationships in metals, polymers, and ceramics. The course will also introduce the students to a few advanced materials in engineering applications. Essentially, this course will lay the foundation for all courses in Mechanical Engineering.

Course content


Introduction to Materials, Materials Testing and Properties, Mechanical Properties of Materials, Material Selection for Mechanical Design, Crystal Structures, Metals and Metallic Alloys, High strength and High temperature Superalloys, Engineering Ceramics, Polymers, Composite Materials: Polymeric, Ceramic and Metal Matrix Composites, Smart Materials.

Total number of lectures: 26

Lecturewise breakup


1. Material Structure: 6 Lectures

  • Atoms and atomic bonds

  • Defects

  • Crystalline and amorphous materials

  • Characterization

2. Mechanical Behaviour of Materials: 8 Lectures

  • Stress and strain (tensile test)

  • Hardness

  • Hardening of materials

  • Fracture

  • Fatigue

  • Creep and relaxation

3. Classes of Materials: 10 Lectures

  • Metals and alloys (altering physical properties and phase diagrams)

  • Polymers and Composites

  • Ceramics

  • Functional and emerging materials

4. Special topics: 2 Lectures

  • Thermal properties

  • Optical properties

  • Reynolds transport theorem

Recommended books


Textbooks

  1. Materials Science and Engineering: An introduction, William D. Callister, John Wiley and Sons

  2. Engineering Materials 1: An Introduction to Properties, Applications and Design Michael F. Ashby, Elsevier

Reference Books

  1. Mechanical Metallurgy, George E. Dieter, McGraw-Hill

  2. Materials Science and Engineering, V. Raghavan, Prentice Hall

Proposing instructors: C. Chandraprakash, Manjesh K. Singh, Ushasi Roy, and Bishakh Bhattacharya