PAYMENT
STEADY STRESSES AND VARIABLE STRESSES IN MACHINE MEMBERS 9
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.