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ENGR 213001 Sp17 / HW CH 12
*P12.081 GO Multipart
*Part 1
Correct
Consider a point in a structural member that is subjected to plane stress. Normal and shear stress
magnitudes acting on horizontal and vertical planes at the point are Sx = 330 MPa, Sy = 105 MPa,
and Sxy = 65 MPa. Assume .
Construct Mohr’s circle for this state of stress on paper and use the results to answer the questions
in the subsequent parts of this GO exercise.
For this Mohr’s circle, point x, which represents the state of stress on the x face of the stress
element, should appear:
*Part 2
Correct
For the given state of stress at a point in a structural member, determine the center C and the
radius R of Mohr’s circle.
Answers: C = MPa, R = MPa.
Below and to the right of the circle center.
Above and to the left of the circle center.
Above and to the right of the circle center.
Below and to the left of the circle center.
217.5 129
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Answer *1: the tolerance is +/2%
Answer *2: the tolerance is +/2%
*Part 3
Correct
Determine the principal stresses ( ) for this state of stress.
Answers: MPa, MPa.
Answer *1: the tolerance is +/2%
Answer *2: the tolerance is +/2%
*Part 4
Incorrect
Use the coordinates of point x and the center C of the circle to determine the acute central
angle. The other central angle is 180° minus the acute angle.
For this Mohr’s circle, determine the magnitude of the central angle between:
(a) point x and the point representing the principal stress .
(b) point x and the point representing the principal stress .
Answers:
(a) Angle = °,
(b) Angle = °.
Answer *1: the tolerance is +/2%
Answer *2: the tolerance is +/2%
Part 5
Correct
Angles measured in Mohr’s circle are double angles . The orientation of the principal planes in
the x–y coordinate system is defined by an angle . If the acute angle determined in Part 4 is
used for , which sketch correctly defines the orientation of the principal planes?
88.5 346.5
4.09 *1
175.91 *2
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*Part 6
(a) Determine the magnitude of the maximum inplane shear stress.
(b) Determine the normal stress that acts on planes of maximum inplane shear stress. Give the
stress value including sign if any.
Answers:
(a) MPa.
(b) MPa.
Answer *1: the tolerance is +/2%
Answer *2: the tolerance is +/2%
*Part 7
To determine the normal and shear stresses.
2024.03.23 What do successful readers do - Sandy Millin for PARK.pptx
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ENGR 213-001 Sp17 / HW CH 12
*P12.081 GO Multipart
*Part 1
Correct
Consider a point in a structural member that is subjected to plan
e stress. Normal and shear stress
magnitudes acting on horizontal and vertical planes at the point
are Sx = 330 MPa, Sy = 105 MPa,
and Sxy = 65 MPa. Assume .
Construct Mohr’s circle for this state of stress on paper and use
the results to answer the questions
in the subsequent parts of this GO exercise.
For this Mohr’s circle, point x, which represents the state of str
ess on the x face of the stress
2. element, should appear:
*Part 2
Correct
For the given state of stress at a point in a structural member, d
etermine the center C and the
radius R of Mohr’s circle.
Answers: C = MPa, R = MPa.
Below and to the right of the circle center.
Above and to the left of the circle center.
Above and to the right of the circle center.
Below and to the left of the circle center.
-217.5 129
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Answer *1: the tolerance is +/-2%
3. Answer *2: the tolerance is +/-2%
*Part 3
Correct
Determine the principal stresses ( ) for this state of stress.
Answers: MPa, MPa.
Answer *1: the tolerance is +/-2%
Answer *2: the tolerance is +/-2%
*Part 4
Incorrect
Use the coordinates of point x and the center C of the circle to d
etermine the acute central
angle. The other central angle is 180° minus the acute angle.
For this Mohr’s circle, determine the magnitude of the central a
ngle between:
(a) point x and the point representing the principal stress .
(b) point x and the point representing the principal stress .
Answers:
(a) Angle = °,
(b) Angle = °.
Answer *1: the tolerance is +/-2%
Answer *2: the tolerance is +/-2%
4. Part 5
Correct
Angles measured in Mohr’s circle are double angles
. The orientation of the principal planes in
the x–y coordinate system is defined by an angle
. If the acute angle determined in Part 4 is
used for
, which sketch correctly defines the orientation of the principal
planes?
-88.5 -346.5
-4.09 *1
175.91 *2
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*Part 6
(a) Determine the magnitude of the maximum in-plane shear str
ess.
(b) Determine the normal stress that acts on planes of maximum
in-plane shear stress. Give the
stress value including sign if any.
Answers:
(a) MPa.
(b) MPa.
Answer *1: the tolerance is +/-2%
Answer *2: the tolerance is +/-2%
*Part 7
To determine the normal and shear stresses on the indicated pla
ne, we must first determine the
orientation of the inclined plane relative to the x face of the stre
ss element. Determine the
magnitude of the counterclockwise angle
between the x face and the inclined plane. Assume Sx
= 330 MPa, Sy = 105 MPa, Sxy = 65 MPa, and .
Answer: °.
6. the tolerance is +/-2%
*1
*2
*1
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*Part 8
For Mohr’s circle, all angular measures are doubled; therefore,
point n (which represents the state
of stress on the n plane) on Mohr’s circle is rotated
counterclockwise from point x. From the
Mohr’s circle that you constructed on a piece of paper, determin
e the central angle between
point n and the principal stress .
Answer: °.
8. *2
*1
1
BIT 3444
Homework 3: A DataReader Application
Homework 3 Submission: This is an individual homework
assignment. Compress your
complete VB project folder into a .zip file. Upload the .zip file
to our homework
submission site.
In this assignment, you will implement an electronic stock
trading system. Your system
will accept trading orders and based on those orders, it will
keep track of pending orders,
and execute trades when possible.
1. Database design (20 points)
9. Use Microsoft Access to design a database for the stock trading
system. You should
determine the tables to be created, the attributes in each table,
and the primary key in
each table. DO NOT define foreign keys in this assignment even
they do exist. It will be
easier for you to debug your VB program when foreign keys are
absent.
The system maintains common stocks records. Each stock is
described by a ticker symbol
(e.g., BAC), a company name, exchange venue (e.g., NYSE),
listing date, sector, and
industry.
The system also keeps track of stocks’ daily closing records.
Each closing record consists
of a ticker symbol, a date, opening price, highest price of the
day, lowest price of the day,
the closing price, trading volume on that day, and 1 day price
change %.
Users can use the system to place market order requests for
stock trading. A market order
is a request to purchase or sell a stock at the current market
10. price. Each order request
should include a ticker symbol, date and time of the request,
type of order (buy or sell),
quantity of stock to be traded, and order status (pending,
completed, or cancelled).
2. Database population (10 points)
Use Microsoft Access to populate at least 10 records into each
of the database tables created
above. You must pick at least 10 stocks from this web site:
http://www.1stock1.com/1stock1_112.htm , where you can find
last year’s return rate % for each
stock. For other stock information, please use the Yahoo!
Finance
(http://finance.yahoo.com/stock-center/) and search by the stock
ticker symbol. The sector and
industry information can be found from the company profile
page on Yahoo! Finance. Please
make sure that you have at least 2 sectors and 2 industries per
sector, and that each industry has at
least 2 stocks.
After you populate the stocks table, you should populate daily
11. records and trading requests based
on either true market data or your imagination. Please make
sure that you have a mixture of
different order types and statuses for different stocks. A
minimum of 10 records is required for
each table.
3. SimpleBroker v1.0: A DataReader Application (70 points).
http://www.1stock1.com/1stock1_112.htm
http://finance.yahoo.com/stock-center/
2
MB v1.0 is a DataReader application for placing stocking
trading request. You must use a
DataReader object to retrieve records from the database and a
Command object to update the
database. The following describes the components needed for
the development.
(1) User interface: You should design your user interface to
support the following functions.
Label objects should be used appropriately to make your
interface user-friendly. (10 points)
(2) Populate the stock ticker ComboBox control: The user
12. should start with a ComboBox
control (StocksComboBox) that displays the complete list of
stock tickers retrieved from
the database. (15 points)
(3) Populate the stock closing price ListBox control: After the
user selects a stock ticker from
StocksComboBox, a ListBox control (ClosingPricesListBox)
should display a list of past
closing prices of the selected stock. Each past closing price
should indicate both a date and
a closing price (e.g., “03/20/2013-$90.23”). The list should be
ordered by descending dates.
(15 points)
(4) Populate a ListBox control: After the user selects a stock
ticker from StocksComboBox,
another ListBox control (TradingRequestsListBox) will display
a list of currently pending
stock trading requests for the selected stock. Each request
should indicate the order type
and stock quantity (e.g., “BUY-2000”). The list is ordered by
the order type first and then
by quantity. (15 points)
(5) Placing a new order request (15 points):
13. ComboxBox control
(TradeTypeComboBox), and enters a stock quantity to be traded
in a TextBox
control (QuantityTextBox).
request record to
the database.
4. Bonus questions (20 points):
(6) Sector selection: Another ComboBox control
(SectorsComboBox) should be used to
display all sectors in the database. The user starts with selecting
a specific sector from
SectorsComboBox. StocksComboBox will then only display
those stock stickers in the
selected sector. (10 points)
(7) Error handling: Use data validation or exception handling to
prevent the following
runtime errors from interrupting the program execution:
a. Non-numeric values in QuantityTextBox (5 points)
b. OleDbException when populating the ListBox and ComboBox
controls.
You can get such an exception if your database table is open
14. from Access in
the Design View when you try to execute your VB program. (5
points)
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*Part 1
The cantilever beam shown consists of a rectangular structural s
teel tube shape [E = 200 GPa; I
= 350 × 106 mm4]. Assume P = 55 kN, w = 15 kN/m, LAB = 1.5
0 m, and LBC = 2.50 m. For the
loading shown, determine:
(a) the beam deflection at point A.
(b) the beam deflection at point B.
Determine the component of the beam deflection at point A due
to only the uniformly distributed
15. load of w = 15 kN/m.
Answer: vA,w = mm.
the tolerance is +/-2%
*Part 2
Determine the component of the beam deflection at point B due
to only the concentrated load of P
= 55 kN.
Answer: vB,P = mm.
the tolerance is +/-2%
*Part 3
Determine the component of the rotation angle of the beam at p
oint B due to only the concentrated
load of P = 55 kN.
Answer: rad.
the tolerance is +/-2%
*1
*1
*1
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*Part 4
Determine the component of the beam deflection at point A due
to only the concentrated load of P
= 55 kN.
Answer: vA,P = mm.
the tolerance is +/-2%
*Part 5
Determine the total beam deflection at point A due to the combi
ned effects of the concentrated load
P and the uniformly distributed load w.
Answer: vA = mm.
the tolerance is +/-2%
*Part 6
Determine the component of the beam deflection at point B due
to only the uniformly distributed
load of w = 15 kN/m.
Answer: vB,w = mm.
18. ENGR 213-001 Sp17 / HW CH 10
*P10.050 GO Multipart
*Part 1
Correct
You will analyze four different beams. For each beam and loadi
ng, determine the beam deflection at
point H. Assume that EI = 1.5 × 10
7
kip-in.
2
is constant for each beam. Remember that a positive
deflection is up and a positive rotation is counterclockwise.
Here is Beam 1.
Assume LAB=7 ft, LBH=9 ft, MB=45 kip-ft.
For Beam 1, determine the deflection and rotation angle at point
B.
Answers: vB1 = in., rad.
Answer *1: the tolerance is +/-2%
Answer *2: the tolerance is +/-2%
*Part 2
Correct
19. For Beam 1, determine the deflection at point H.
Answer: vH1 = in.
the tolerance is +/-2%
*Part 3
-0.127 -0.00302
-0.45
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Incorrect
In Appendix C, see the simply supported beam with a concentrat
ed force P which does not act
at beam midspan. Here, for the purpose of calculating the rotati
on angle at point C due to P,
the portion of the beam from C to H can be ignored, and the bea
m can be treated as a simply
supported beam of length AC. Be careful with units and the sign
20. convention.
Here is Beam 2
Assume LAB=13 ft, LBC=8 ft, LCH=5 ft, P=15 kips.
For Beam 2, determine the rotation angle at point C.
Answer: rad.
the tolerance is +/-2%
*Part 4
For Beam 2, determine the deflection at point H.
Answer: vH2 = in.
the tolerance is +/-2%
*Part 5
Correct
Here is Beam 3.
Assume LAH=5 ft, LHB=10 ft, w=2.0 kips/ft.
0.084 *1
*1
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For Beam 3, determine the deflection at point H.
Answer: vH3 = in.
the tolerance is +/-2%
*Part 6
Incorrect
In Appendix C, see the cantilever beam with a uniformly distrib
uted load. For this calculation,
the portion of the beam from A to B can be ignored. The beam i
s treated as a cantilever beam
of length AB that is fixed at A. Be careful with units and the sig
n convention.
Here is Beam 4.
Assume LHA=9 ft, LAB=23 ft, w=4.0 kips/ft.
For Beam 4, determine the cantilever deflection of the beam at
point H due to the uniformly
distributed load 4.0 kips/ft between point A and point H. This is
the deflection that would be
calculated at point H assuming a fixed support at A.
22. Answer: vH4a = in.
the tolerance is +/-2%
*Part 7
-0.816
0.472 *1
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For Beam 4, determine the magnitude (report a positive number)
of the bending moment at point A
due to the uniformly distributed load 4.0 kips/ft between point
H and point A.
Answer: MA = kip-ft.
the tolerance is +/-2%
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ENGR 213-001 Sp17 / HW CH 9
*P9.001
Incorrect
For the following problem, a beam segment subjected to internal
bending moments at sections A
and B is shown along with a sketch of the cross-sectional dimen
sions. Consider area (1) of the
20-in.-long beam segment, which is subjected to internal bendin
g moments of MA = 25kip-
ft and MB = 34kip-ft. Assume b=3.1 in., t=0.85 in. and d=16.25
in.
(a) Sketch a side view of the beam segment and plot the distribu
tion of bending stresses acting at
sections A and B. Indicate the magnitude of key bending stresse
s on the sketch.
(b) Determine the resultant forces acting in the x direction on A
rea (1) at sections A and B and
show these resultant forces on the sketch.
25. (c) Is the Area (1) in equilibrium with respect to forces acting i
n the x direction? If not, determine
the horizontal force required to satisfy equilibrium for the speci
fied area and show the location and
direction of this force on the sketch.
Answer Section
(a) On paper, sketch a side view of the beam segment and plot t
he distribution of bending stresses
acting at sections A and B. Indicate the magnitude of key bendi
ng stresses on the sketch. Below,
enter the normal stresses at the specified locations. For your ent
ries below, follow the sign
convention for normal stresses.
Answers:
At the top of the upper flange, section A:
psi
At the bottom of the upper flange, section A:
psi
At the top of the lower flange, section A:
psi
At the bottom of the lower flange, section A:
2346 *1
-1173 *2
26. 1173 *3
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psi
At the top of the upper flange, section B:
psi
At the bottom of the upper flange, section B:
psi
At the top of the lower flange, section B:
psi
At the bottom of the lower flange, section B:
psi
(b) Below, enter the magnitudes of the resultant forces acting in
the x direction on Area (1) at
sections A and B. Since you are entering force magnitudes belo
w, enter positive values.
FA =
lb
FB =
lb