DESIGN OF MACHINE ELEMENTS - I
KTU 2016 , ME401
Module I
Introduction to Design- Definition, steps in design process, preferred numbers, standards and codes in design ,
Materials and their properties- Elastic and plastic behaviour of metals, ductile and brittle behaviour, shear, bending and torsional stresses, combined stresses, stress concentration factor.
Module II
Theories of Failure- Guest’s Theory, Rankine’s Theory, St. Venant’s Theory, Haigh’s Theory, and Von Mises and Hencky Theory.
Shock and impact loads, fatigue loading, endurance limit stress, factors affecting endurance limit, factor of safety
FIRST INTERNAL EXAM
Module III
Threaded Joints- Terminology, thread standards, types of threads, stresses in screw threads
Bolted joints- effect of initial tension, eccentric loading, design of bolts for static and fatigue loading, gasketed joints, power screws
Module IV
Design of riveted joints- Material for rivets, modes of failure, efficiency of joint, design of boiler and tank joints, structural joints
Cotter and Knuckle joints- Gib and Cotter Joint, analysis of knuckle joint.
Design of welded joints- welding symbols, stresses in fillet and butt welds, Butt joint in tension, fillet weld in tension, fillet joint under torsion, fillet wed under bending, eccentrically loaded welds.
SECOND INTERNAL EXAM
Module V
Springs- classification, spring materials, stresses and deflection of helical springs, axial loading, curvature effect, resilience, static and fatigue loading, surging, critical frequency, concentric springs, end construction.
Leaf springs- Flat springs, semi elliptical laminated leaf springs, design of leaf springs, nipping
Module VI
Shafting- material, design considerations, causes of failure in shafts, design based on strength, rigidity and critical speed, design for static and fatigue loads, repeated loading, reversed bending
Design of Coupling- selection, classification, rigid and flexible coupling, design of keys and pins
END SEMESTER EXAM
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