WITH EFFECT FROM THE ACADEMIC YEAR 2012 - 2013
ME 303
DESIGN OF MACHINE ELEMENTS
Instruction 4 Periods per week
Duration of University Examination 3 Hours
University Examination 75 Marks
Sessional 25 Marks
UNIT-I
Design considerations of Machine Elements. Materials used in machine design and their specifications according to Indian Standards. Codes and standards used in design. Important mechanical properties of materials used in design. Preferred numbers. Manufacturing considerations in design. Review of types of loads and simple stresses. Stresses due to Biaxal andTriaxal loads. Factor of safety. Theories of failures. Design of components subjected to impact loading.
UNIT-II
Design for Fatigue: Fluctuating stresses, fatigue strength and endurance limit Stress concentration factor and Notch sensitivity. Factors affecting fatigue strength. S-N diagram, Soderberg and Modified Goodman’s diagrams for fatigue design. Cumulative fatigue - Miner’s rule.
UNIT-III
Design of shafts: solid, hallow and splined shafts under torsion and bending loads. Design of keys. Design of couplings - Muff, Split muff, Flange, Flexible, Marine type couplings.
UNIT-IV
Design of Joints: Cotter and Knuckle joints. Design of pulleys. Design of chain drives linked and laminated chains. Design of bolts and nuts, Locking devices for nuts, Bolts of uniform strength. Bolted joints under eccentric loads. Design of gasket joints.
UNIT-V
Design of Screws: Design of power Screws and screw jack. Differential and Compound Screws. Design of rivetted and welded joints under direct and eccentric loads.
5 6
Suggested Reading:
- 1.M.F. Spotts, “Design of Machine Elements”, Pearson Edu, 7th edn. 2003.
- 2.V. B. Bhandari, “Design of Machine Elements”, Tata McGraw-Hill Publ, 3rd Edn. 2010.
- 3.P.C. Sharma & D.K. Aggarwal, "Machine Design", S.K. Kataria & Sons, 10th edn, 2003.
- 4.P. Kannaiah, Machine Design, Sci-Tech Publ., 2009.
- 5.J.E. Shigley & Charles R. Mischke “Mechanical Engineering Design”, Tata McGraw-Hill., 6th ed. 2010.