DESIGN OF MACHINE ELEMENTS

GUJARAT TECHNOLOGICAL UNIVERSITY

MECHANICAL ENGINEERING (19)

DESIGN OF MACHINE ELEMENTS

SUBJECT CODE:- 2151907

B.E 5th SEMESTER

1. Introduction:- Design procedure, Selection of preferred sizes, Aesthetic and Ergonomic considerations in Design, Manufacturing considerations in Design, Mechanical Properties of Materials, Effect of Alloying elements and heat treatment on properties of steel, Materials Selection in Machine Design,  IS coding of steels and cast irons.
2. Design Against Fluctuating Loads:- Stress Concentration, Endurance limit and Fatigue failure, Factors affecting endurance limit, S-N Diagram, Design for reversed stresses and cumulative damage, Fluctuating stresses; Soderberg Gerber, Goodman and Modified- Goodman criteria, Combined Stresses.
3. Design of Springs:- Classification of springs, Helical Spring; Style of ends, Stresses, Correction Factors, and Deflection, Design against static and fluctuating loads, Concentric springs, surge phenomenon, Helical Torsion and Spiral Springs, Belleville spring, shot peening of springs. Multi-Leaf Spring; Terminology, Nipping, and Design of Multi-leaf spring.
4. Belt and Chain Drives:-                                                                                                                                                                                    Flat Belt Drive:- Belt Construction, Flat Belt Drive; Length of belt : Open and Cross drive types, Ratio of Tensions on tight side to slack side, Condition for maximum power transmission, Creep phenomenon, Methods for tensioning, Selection  of belts from catalogues, Design of pully for flat belt drive, Timming belt selection. V-Belt Drive, Nomenclature, Selection of V- Belts from catalogues.                                                                                                                                                                                  Chain Drives:- Nomenclature of roller chains, Lengths and power rating of chains, Design of chain drive.
5. Pressure Vessels:- Thin cylinders and spherical vessels, wire wound cylinders, Thick cylinders: Principal stresses in cylinder subjected to internal/external pressure, Lame’s equation, Clavarion’s and Bernie’s equations, Autofrettage, Compounding of cylinders, Gasketed Joints, Thickness of cylindrical and spherical shells, Design of End closures, Area compensations of nozzles, Introduction to Design codes.