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SPRING SEMESTER 2013
SUBJECT NAME
MECHANICS OF
Mechanics of solids Online Quiz 2part 2
Question 1
Find the maximum bending stress (tensile) at section above B in the overhanging beam shown below (in
Mpa). The beam is supported by a pin at A and a roller at B. The following data apply:
c = 4 m, d = 2
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AUTUMN SEMESTER 2015
SUBJECT NAME
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MECHANICS OF SOLIDS
SUBJE
Welcome to:
48331 MECHANICS of SOLIDS
for Spring 2015
Subject informaCon
48331 Mechanics of Solids
Credit Points 6
Lecture Thursday 2.30pm or
Friday 11am
Tutorial Monday 9am,
Mechanics of Solids
 Bending stress in composites cross sections
o For a fully composite beam: the cross sectional area
interface will remain straight after bending
o Bending stress
Linear distribution with jump at interface
At interface: strain is the
Mechanics of Solids
 Shear stress
o Transverse shear stress
For beams with only shear, no bending
o Transverse and longitudinal stress
 Generalised expression for shear stress

Mechanics of Solids Online Quiz 2 part 1
Question 1
Two axes are parallel to each other. The first axis is at a distance d1 from the centroid of an
area A and the second axis is at a distance d2 from the centroid. The second moment of
area of the area A
NORMAL STRAIN
Defining average normal strain using avg (epsilon)
When is positive, initial structural element will elongate, if is negative then
it will contract
UNITS
Normal strain is a dimensionless quantity, as its a ratio of two lengths
But common pra
SHEAR STRAIN
Defined as the change in angle that occurs between two line segments that
were originally perpendicular to one another
This angle is denoted by (gamma) and measured in radians (rad)
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Most engineering designs involve applications for which on
Mid Semester Spring 2014 Main Exam
STUDENT NUMBER:
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SURNAME:
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(FAMILY NAME)
UNIVERSITY DF TECHNOLOGY, SYDNEY
OTHER NAME$:
LECTURER/TUTORIAL DETAILS:
(IF KNOWN)
This paper and all materials issued must be returned at the end of the ex
Autumn 2015 Main Exam
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STUDENT NUMBER:
iUTS
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SURNAME:
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Thikpaper and all materials issued must be. retuil"'ed at the end of the examination.
They are not to be reOOV'd from the exam centre.
Examination Conditions:
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Spring 2015  Main Exam
STUDENT NUMBER:
iUTS
I I I I I I I I I
SURNAME:
(FAMILY NAME)
UNIVERSITY OF TECHNOLOGY, SYDNEY
OTHER NAMES:
This paper and all materials issued must be returned at the end of the examination.
They are not to be removed from the e
NORMAL STRESS
Normal because this is stress with direction normal to the plane of the crosssection
Also known as axial stress
Symbol used for normal stress is
Tensile stress: normal
force pulls or stretches the area element A
Compressive stress: normal f
ELASTIC BEHAVIOUR
Starts with a straight line (linearly elastic) i.e. stress is proportional to strain
Upper stress limit for linearly elastic behavior is the proportional limit; pl
Elastic limit is the maximum stress at which elastic behavior still occur
SHEAR STRESS
Intensity of the force, or force per unit area, acting tangent to A
Symbol used for shear stress is (tau)
Shear stress is the stress component that acts in the plance of the sectioned
area
Consider a force F acting on the bar shown below
For
THE PRINICPLE OF SUPERPOSITION
This principle can be used as long as the following conditions are satisfied:
o Each effect is linearly related to the load which produces it
o The deformation resulting from any given load is small and does not
affect the c
MECHANICS OF SOLIDS
(48331)
WEEK 1
STRESS
Pressure and Stress are very much related
External loads and reactions generate internal forces in structures
For trusses these are axial forces
The intensity of these internal forces acting over a finite crossse
THERMAL STRAIN
Generally when solid materials are heated they expand and when they are
cooled they contract
Experimental data have been collected and analysed to describe the change
in length per unit of the original length of a bar of material for each d
GENERALISED HOOKES LAW
In generating the generalized expressions for Hookes Law we first considered
separately the effect of each stress component
And then combined the results
This process is based on the principle of superposition
CONVENTIONAL STRESSSTRAIN DIAGRAM
Using the recorded data, we can determine nominal or engineering stress by
DIAGRAMS
Likewise, nominal or engineering strain is found
directly from strain gauge reading, or below:
Mechanics of solids
 Pure bending
o Relate the internal bending moment to the sttesses it
cases in a beam.
 First moment of area
o Centroid is the geometric centre of the cross section
soeullowS
Student/Group Name
Student No.
48321 ENGINEERING MECHANICS Autumn 2014
UIZ 2 EQUILIBRIUM & TRUSSES
For the questions listed below circle the letter next to the most correct
answer. For questions where calculations are required, no marks will be