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## Elements of Mechanical Engineering

### Learning Objectives:

The content of this course shall offer the scholar the essential ideas of varied mechanical systems and exposes the scholar to a good vary of kit and their utility in a very sensible state of affairs. It shall offer the elemental principles of materials, fuels, Steam, I.C. Engines, compressors, hydraulic machines and transmission systems that sometimes exist in any method plant.

#### UNIT –I:

Stresses and strains: varieties of – stress-strains, physical property and malleability, Hooks law, stress – strain diagrams, modules of physical property, Poisson’s quantitative relation, linear and meter strain, relation between E, N, and K, bars of uniform strength, compound bars and temperature stresses.

#### UNIT– II:

Types of supports – hundreds – Shear force and bending moment for cantilever and easily supported beams while not overhanging for all sorts of hundreds.
Theory of straightforward bending, straightforward bending formula, Distribution of Flexural and Shear stress in Beam section – Shear stress formula – Shear stress distribution for a few commonplace sections

#### UNIT-III:

Thin cylindrical shells: stress in cylindrical shells because of internal pressures, circumferential stress, longitudinal stress, style of skinny cylindrical shells, spherical shells, modification in dimension of the shell because of internal pressure, modification in volume of the shell because of internal pressure.
Thick Cylinders: Lame’s equation- cylinders subjected to within and out of doors pressures columns and Struts.

I Year – II Semester
L T P C
4 0 0 3

#### UNIT-IV:

Steam boilers and reciprocal air compressors: Classification of boilers, essentialities of boilers, choice of various varieties of boilers, study of boilers, boiler mountings and accessories.
Reciprocating air compressors: uses of compressed gas, work exhausted single stage and twostage compression, repose cooling and easy issues.

#### UNIT-V:

Internal combustion engines: classification of IC engines, basic engine elements and word, rule of engines, Four strokes and 2 stroke hydrocarbon and diesel engines, comparison of CI and SI engines, comparison of 4 stroke and 2 stroke engines, straightforward issues like indicated power, brake power, friction power, specific fuel consumption, brake thermal potency, indicated thermal potency and mechanical potency.

#### UNIT-VI:

Belts –Ropes and chain: belt and twine drives, rate quantitative relation, slip, length of belt , open belt and cross belt drives, quantitative relation of friction tensions, centrifugal tension in a very belt, power transmitted by belts and ropes, initial tensions within the belt, straightforward issues.
Gear trains: classification of gears, gear trains rate quantitative relation, simple, compound –reverted and planetary gear trains.
Outcomes: once finishing the course, the scholar shall be able to determine:
• The stress/strain of a mechanical element subjected to loading. • The performance of elements like Boiler, I.C. Engine, Compressor, Steam/Hydraulic rotary engine, Belt, Rope and kit. • the sort of mechanical element appropriate for the desired power transmission.

#### Text Books:

1. Strength of Materials and Mechanics of Structures, B.C.Punmia, commonplace Publications and distributions, nine th edition, 1991. 2. Thermal Engineering, Ballaney,P.L., Khanna Publishers, 2003. 3. components of technology, A.R.Asrani, S.M.Bhatt and P.K.Shah, B.S. Publs. 4. components of technology, M.L.Mathur, F.S.Metha&R.P.Tiwari religious belief Brothers Publs., 2009.

#### Reference Book:

Theory of Machines, S.S. Rattan, Tata handler Hil., 2004 & 2009.