Next: Changes in Shape
Up: Deformation of Solids
Previous: Deformation of Solids
To stretch or compress something you must exert a force on it at
Tensile Stress is the force per unit cross-sectional area
on the ends. (Note the surface whose area we wish to measure is
perpendicular to the force. See Fig.9.1)
Tensile Strain is the fractional change in length.
Young's Modulus ( Y ) is the ratio of tensile stress to
where F is the applied force, LO is the original length of the
is the cross-sectional area of the object, and L is the
change in the
length of the object. Notice that Y has S.I. units of N/m 2.