# Macromechanics of a Lamina

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15 Νοε 2013 (πριν από 4 χρόνια και 7 μήνες)

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Chapter 2

Macromechanics of a Lamina

http://numericalmethods.eng.usf.edu

Identify the picture of your instructor

A.
B.
C.
D.
0%
0%
0%
0%
A.

B.

C.

D.

A simply supported
isotropic beam
with a
square
cross
-

The
vertical deflection at the center (along the length) of
the beam is measured to be 16 mm.

If
the beam thickness is doubled, the vertical deflection
at the center
of
the beam
in mm will
be measured to be

A.
1

B.
2

C.
4

D.
8

1
2
4
8
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A simply supported
isotropic beam
with a
square
cross
-

The maximum shear stress in the beam is measured to
be 80
kPa
.

If
the beam thickness is doubled,
the maximum shear
stress in
kPa

in the beam would be

A.
10

B.
20

C.
40

D.
80

10
20
40
80
0%
0%
0%
0%
The number of nonzero elements in a
stiffness matrix for an orthotropic material in
3
-
D is

A.
4

B.
9

C.
12

D.
21

4
9
12
21
0%
0%
0%
0%
The number of independent constants in a
stiffness matrix for an orthotropic material in
3
-
D is

A.
4

B.
9

C.
12

D.
21

4
9
12
21
0%
0%
0%
0%
How many strain gages would it take to find
the strain state at a particular point on a
plane?

A.
1

B.
2

C.
3

D.
Depends on the
problem

1
2
3
Depends on the problem
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If normal axial load is applied along the
length to a prismatic circular rod, shear
stresses __________ in the rod.

A.
do not exist

B.
exist

do not exist
exist
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Transformation of stresses at a point in a
coordinate system to another coordinate
system is dependent
on

A.
the elastic properties of the
material

B.
the angle between the two co
-
ordinate systems.

C.
the elastic properties of the
material and the angle between
the two co
-
ordinate systems

the elastic properties of ...
the angle between the t..
the elastic properties of ...
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