Engineering Mechanics

Units Definitions quality of materials-forces acting on a machine General problem of design- Effect of temperature-steady sudden and impulsive loads-fatigue-wohlers law - factors of safety Resilience sudden and impulsive loads-tables of strength etc -tension-compression-shearing-modulus of rigidity Bending-moments of inertia-modulus of section-table of I Z etc-Tables and curves on shearing face bending moments deflection Directions for practical work-Practical problem I -The knuckle joint Bolts Nuts screws Forms of screw threads. Applications of bolts studs nuts etc. Stresses in bolts and Screws. Friction and efficiency of Screws. Number size and pitch of cylinder cover studs Practical Problem The screw jack Compound stresses: bending combined with tension or compression. combined stresses. Struts and columns Eulers formula. Empirical formulae Rankines or gordons straight line formula Cotters: Design of cottered joint-Gib and cotter-Taper of the cotter The theory of the connecting rod Practical problem III Strapped connecting rod Practical problem IV The Naval type of connecting rod Shafts and journals: Torsion. Strength of shafts. Twist of shafts. size ofshaft for given horse-power. Strenght of journals and pins. Table of bearing pressures combined turning and bending moments couplings and bolts Friction and lubrication of bearings; General effect of friction. Dry and lubricated surfaces. Nominal or projected area of bearing work of friction value of u. Pressure in bearing forced lubrication. Anti-friction metal Thrust bearing Notes on the design of crank shaft cross-head pins etc Practical problem V Design of cylinders Valve chests pistons rods pipes etc Bureau of steam engineering check for strenth of steel pistons Design of cylindrical boilers Screw propeller