ME8593 – NOTES & QP
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ME8593 – SYLLABUS
UNIT I STEADY STRESSES AND VARIABLE STRESSES IN MACHINE MEMBERS
Introduction to the design process — factors influencing machine design, selection of materials based on mechanical properties — Preferred numbers, fits and tolerances — Direct, Bending and torsional stress equations — Impact and shock loading — calculation of principle stresses for various load combinations, eccentric loading — curved beams — crane hook and ?C? frame- Factor of safety — theories of failure — Design based on strength and stiffness — stress concentration — Design for variable loading.
UNIT II SHAFTS AND COUPLINGS
Design of solid and hollow shafts based on strength, rigidity and critical speed — Keys, keyways and splines — Rigid and flexible couplings.
UNIT III TEMPORARY AND PERMANENT JOINTS
Threaded fastners — Bolted joints including eccentric loading, Knuckle joints, Cotter joints — Welded joints, riveted joints for structures — theory of bonded joints.
UNIT IV ENERGY STORING ELEMENTS AND ENGINE COMPONENTS
Various types of springs, optimization of helical springs — rubber springs — Flywheels considering stresses in rims and arms for engines and punching machines- Connecting Rods and crank shafts.
UNIT V BEARINGS
Sliding contact and rolling contact bearings — Hydrodynamic journal bearings, Sommerfeld Number, Raimondi and Boyd graphs, ? Selection of Rolling Contact bearings.