1
Phy 2053 Announcements
±
Good luck on Exam 2!
±
Exam 2 grades – grades should be
available by Monday, April 6 on UF e
Learning web site.
±
Exam 2 solutions will be posted early
next week
±
HW Assignment 9 next Wednesday,
April 8
±
Stress
 force per unit area
causing the deformation
±
Strain
 measure of the
amount of deformation
±
The
elastic modulus
is the
constant of proportionality
between stress and strain
±
Three types of moduli:
±
Young’s modulus, shear modulus,
bulk modulus
Elastic Properties of Solids
o
FL
Y
AL
Δ
=
Young’s Modulus:
Y
Strain
Stress
=
Stress = Y x Strain
or
Stress (
F/A
) has units of N/m
2
1 N/m
2
= 1 Pascal (Pa)
Young’s Modulus:
Elasticity in Length,
Hooke’s Law redux
F
A
L
0
Δ
L
Stress = F/A
Strain =
Δ
L/L
0
L
L
Y
A
F
L
L
Y
A
F
Δ
=
⇒
Δ
=
0
0
k
Determine the elongation of the
rod shown below if it is under a
tension of 5.8
×
10
3
N.
Example
#911
Y
Al
=
7 x 10
10
Pa
11 x 10
10
Pa
Shear Modulus
±
±
S is the shear
modulus
±
A material having a
large shear modulus
is difficult to bend
F
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '06
 Buchler
 Physics, Shear modulus, Bulk Modulus, Patm Patm

Click to edit the document details