Homework 2
MCG5138 Materials Selection in Engineering Design
Fall2016
Homework 2 (to be submitted by Monday 24th October)

1. You have been charged to providing the very best of vaulting poles.
International standards require the pole to be cyli
A.2
477
A.2 Moments of sections
of sections
Moments
Z =I/ym
Section shape
h
Area A
Moment I
Moment K
Moment Z
Moment Q
Moment Z p
bh
b h3
12
b h3
b
(10.58 )
3
h
(h > b)
b h2
6
b2 h2
(3h +1.8b)
( h > b)
b h2
4
32 3
3 a4
80
a3
32
a3
20
3a3
64
4
r
4
MCG5138 Materials Selection in Engineering Design
Exercises (to be discussed in class)

1. A compact disc (CD) case is rated according to the materials properties
(transparency, fracture toughness, stiffness, processing and cost). Table 1
sh
Homework 2
MCG5138 Materials Selection in Engineering Design
Fall2016
Homework 2 (to be submitted by Monday 24th October)

1. You have been charged to providing the very best of vaulting poles.
International standards require the pole to be cyli
Homework 1
that
dhat
a
a
)
e
ne
arine
marine
stic
astic,
MCG5138 Materials Selection in Engineering Design
Fall2016
th
Homework 1 (to be submitted by Tuesday 11
October)
CES EduPack Exercises
with Worked Solutio
CES EduPack Exercises with Worked So
MCG5138 Materials Selection in Engineering Design
Exercises (to be discussed in class)  Solutions

1a.
Show that the best material choice for the longest cantilever beam with a given
cross section (t x t) which will not fail under its own weigh
MCG5138 Materials Selection in Engineering Design
Exercises No. 3 (to be discussed in class)

Derive
expression
for
the shapeefficiency
factor
eB for
stiffnesslimited
E9.2the
Deriving
shape
factors
for stiffnesslimited
design
(Figure
de
Homework 3
MCG5138 Materials Selection in Engineering Design
Fall2016
E9.2 Deriving shape factors for stiffnesslimited
design (Figure
th
Homework 3 (to be submitted by Sunday 20
November)
E22). Derive the expression for the shapeefficiency
factor Be
M A T E R I A L
I N S P I R A T I O N
00
100
0
Tu
ca ngs
rb te
id n
e
et
M
ys
lo
Co
al pp
oy er
s
N
Si
Al
ic
s
osit
ad
al
lo
ys
g
al
oy
W
G s
oo
d P P PA PE FRP
EK
M C
M
A
PE
T
lo
al
nc
Zi
te
re
nc
Co
S
el ilico
as n
to e
m
ers
0
r
AlN
ns
Al al
lo
Sili
Po