ME 3004             Computer Aided Drawing

3 hours/week       Credits : 1.50

 

Introduction to Computer aided drawing, AutoCAD screen, Screen parameters, AutoCAD co-ordinate system, drawing of elementary geometrical objects, AutoCAD environment, Osnap, grid, Snap etc.; Modifications of objects-Array, Image, Mirror, Offset, Trim, etc.; Polyline, Multiline, Block, Hatch, Text, Dimensions, Layers, Line type, Colour, changing object properties, 3D drawing, Rendering. Printing of rendered objects.


ME 3502              Heat Transfer Sessional

3/2 hours/week    Credits : 0.75

 

Experiments based on ME-3501.


ME 3501           Heat Transfer

3 hours/week    Credits: 3.00

 

Introduction: Basic modes and laws of heat transfer. Thermo-physical properties of substance.

Conduction: Law of conduction; Derivation of general three dimensional conduction equation in Cartesian, Cylindrical & Spherical co-ordinate systems; Steady state one-dimensional conduction of heat in solids-plane wall; Cylinder; Sphere; Composite structures; Analogy between heat flow and electrical flow; Factors influencing thermal conductivity; Effect of variable thermal conductivity; Analysis of heat conduction of system with & without heat sources. Fins of uniform cross-section; Two-dimensional steady state conduction; Analytical and Numerical solutions. Unsteady state conduction; Transient heat flow with negligible internal resistance and with internal and surface resistance; Use of Heisler charts for plates, Cylinders and spheres.

 

Radiation: Electromagnetic wave spectrum and thermal radiation; Laws of Radiation-Planck's law, Weins displacement law, Stefan-Boltzman law, Lamberts cosine law, Kirchoff's Law; Monochromatic emissive power, total emissive power, radiation intensity. Black body & Gray body radiation; Direct radiation & Diffuse radiation; Radiative properties of surfaces; Angle factor; Net radiation interchange between two radiating Infinite parallel planes; Concentric spheres and long cylinders; Simple enclosure problems; Temperature correction; Radiation shield; Gas radiation; Solar  radiation and its prospects in Bangladesh.

ME 3404           Machine Design Sessional

3 hours/week     Credits : 1.50

 

Sessional based on ME-343.


ME 3403           Machine Design

4 hours/week     Credits : 4.00

 

Approach to Design; Simple stress analysis. Factory of safety. Design of simple machine elements; Material Specifications. Stress concentration and Fatigue strength reduction factor. Notch Sensitivity. Variable Load. Column with axial and transverse loading. Screw fastening and other joints. Combined Stresses. Power screws. Pressure vessels. Boilers and combustion chambers. Design of close-coiled helical spring. Journal and plane bearings and their Lubrication. Ball and Roller bearings. Shafts, Flexible power transmitting elements:-Belts, Ropes and chains. Spur, helical, Bevel and worm gears. Keys and couplings. Brakes and clutches.

ME 3304              Production Process-II Sessional

3/2 hours/week    Credits : 0.75

 

Experiments based on ME-3303.


ME 3303           Production Process-II

3 hours/week   Credits: 3.00

 

Cutting Tool : Tool geometry and tool materials.

Mechanics of Metal Cutting : Elements of cutting conditions, mechanism of chip formation, types of chips and effect of different factors on chip formation. Shear plane and shear angle, cutting ratio, chip breakers, friction between cutting tool and chips, built-up-edge.

Cutting Force : Cutting force analysis in orthogonal and oblique cutting, effect of different factors on cutting force, cutting force and power estimation, relations among speed, feed, depth of cut and power input.

Heating Aspects : Heating aspects of metal cutting, effects of different factors on temperature of cutting fluid and its action.

Tool Wear and Tool Life : Mechanisms and geometry of tool wear, tool life, selection of optimum tool geometry, economics of metal cutting.

Metal Removing Processes: Study and analysis of turning, shaping, planing, milling, drilling, ultra finishing operations  and other hole making processes, broaching, grinding.

Abrasive Machining operations: ECM, EDM, Ultrasonic Machining, AJM, EBM, LBM & other related non conventional machining processes.

 

Automation & Robotics : Introduction to N.C. Machine & Part-programming. Introduction to robots & elementary robot programming.


ME 3104             Fluid Mechanics and Machinery Sessional

3/2 hours/week    Credits : 0.75

 

Experiments based on ME-3103.


ME 3103           Fluid Mechanics & Machinery

3 hours/week   Credits: 3.00

 

External Flow: Introduction to boundary layer theory. Estimation of Boundary layer thickness. Skin frictions and drag of a flat plate. Navier-stokes equation. Prandtl's assumption. Laminar Solution. Blasius solution for flat plate.

Fluid Machinery: Types of Fluid machinery. Rotodynamic and positive displacement machinery. Velocity diagram and Euler, pump Turbine equation.

 

Water Turbines: Impulse and Reaction turbines; Pelton wheel. Francis Turbine and Kaplan Turbine. Dimensional analysis applied to Turbines. Specific speed. Unit power, Unit speed. Performance Tests and Characteristic curves of turbines.

Pumps: Centrifugal and axial flow machines. Reciprocating pumps. Specific speed. Performance Tests and Characteristic curves. Cavitations and surging. 

Fans, blowers and compressors.

Wind turbines:  Wind energy extraction: Horizontal and Vertical axis generators.  Application of wind turbines to electrical power generation.

Hydraulic transmission: Fluid Coupling and Fluid Torque converter.

Introduction to fluidics: Hydraulic and pneumatic components and systems; Servocontrol valves, actuators, fluid motors.

Math 3303        Mathematics-VI

4 hours/week    Credit:4

 

Numerical Analysis: Solution of algebraic equations; Graphical method, Iterative Method, Newton’s method, Gauss reduction formula, method of dominating diagonal, Interpolation: Forward and backward difference table, Newton’s formula for forward and backward interpolation. Divided difference, Lagrange’s interpolation formula. Curve fitting: Method of least square, numerical differentiation: Use of Newton’s interpolation formula, Douglas-Avakian method, Graphical differentiation maxima-minima, Raphson’s methods. Numerical integration: Trapezoidal rule, Simpson’s rule, Weddle’s rule, use of Lagrange’s interpolation formula, graphical integration, Solution of differential equations; Adam’s method for first order equation, Picard’s method, Runge-Kutta’s method, Finite difference method.

Statistics: Frequency distribution, Measure of central tendency, Measures of dispersion; Moment, Skewness, Curtosis, Elementary probability theory and discontinuous and continuous probability distribution i.e. Binomial, normal and exponential, Elementary sampling theory, Estimation, Hypothesis testing and regression analysis.