From Machine Design Databook, Second Edition

SYMBOLS [3], [4], [5]

A

area of cross section, m 2 (in 2)

A w

area of web, m 2 (in 2)

a

constant in Rankine's formula

b

radius of area of contact, m (in) bandwidth of contact, m (in) width of beam, m (in)

c

distance from neutral surface to extreme fiber, m (in)

D

diameter of shaft, m (in)

C 1

constant in straight-line formula

F

load, kN (1bf)

F c

compressive force, kN (1bf)

F t

tensile force, kN (1bf)

F ?

shear force, kN (1bf)

F cr

crushing load, kN (lbf)

e

deformation, total, m (in) eccentricity, as of force equilibrium, m (in) unit volume change or volumetric strain

e t

thermal expansion, m (in)

E

modulus of elasticity, direct (tension or compression), GPa (Mpsi)

E c

combined or equivalent modulus of elasticity in case of composite bars, GPa (Mpsi)

G

modulus of rigidity, GPa (Mpsi)

M b

bending moment, N m (lbf ft)

M t

torque, torsional moment, N m (lbf ft)

i

number of turns

I

moment of inertia, area, m 4 or cm 4 (in 4) mass moment of inertia, N s 2 m (lbf s 2 ft)

I xx, I yy

moment of inertia of cross-sectional area around the respective principal axes, m 4 or cm 4

Copyright The McGraw-Hill Companies, Inc. 2003 under license agreement with Books24x7

Products & Services
DC Motors
DC motors are most commonly used in variable speed and torque applications. They include brushless and gear motors, as well as servomotors.
Conductivity Electrodes
Conductivity electrodes are devices that measure the salinity and conductivity of water samples.
Glass Fibers and Fiberglass Cloth
Glass fibers and fiberglass cloth consist of bulk, chopped fibers or continuous strands of glass. Glass fibers and fiberglass cloth is used in reinforcing plastics and composites as well as other specialized electrical and thermal applications.
Industrial Winches
Industrial winches are pulling devices that use a wire, rope, cable, strap or web to move heavy loads. They typically use a drum or reel for line storage and are either manually operated or powered by an electric, pneumatic, or hydraulic motor.

Topics of Interest

SYMBOLS [2], [3] A area of cross-section, m 2 a,b coefficients b width of bar or beam, m c distance from neutral axis to extreme fibre, m velocity of propagation of plane wave along a thin bar,...

SYMBOLS a coefficients with subscripts flexibility acceleration, m/s 2 (ft/s 2) A area of cross section, m (in 2) constant B constant C coefficient of viscous damping, Ns/m or N/v (lbfs/in or...

24.1 CRANKSHAFTS [2], [3] SYMBOLS A area of cross section, m 2 (in 2) b width of crank cheek, m (in) c distance from the neutral axis of section to outer fiber, m (in) d diameter (also suffixes),...

SYMBOLS [3], [4] a radius of circular area of contact, m (in) A acceleration of the follower, m/s 2 (in/s 2) follower overhang, m (in) A c arc of pitch circle, m (in) b half the band of width of...

SYMBOLS [1], [2], [3] A area of cross section, m 2 (in 2) d diameter of shaft, m (in) diameter of cylinder, m (in) E modulus of elasticity, GPa (Mpsi) E c modulus of elasticity of cast iron, GPa...