Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
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Chapter 10, Problem 10.22QP
a)
To determine
Draw the graph between load and deflection using spread sheet.
b)
To determine
Plot the proportional limit on the graph.
c)
To determine
The modulus of rupture of the wood lumber.
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A wood specimen was subjected to bending until failure by applying a load inthe middle of its span. The specimen has a cross section of 25 mm * 25 mm(actual dimensions) and a span of 350 mm between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).
A wood specimen was subjected to bending until failure by applying a loadin the middle of its span. The specimen has a cross section of 1 in. * 1 in.(actual dimensions) and a span of 14 in. between the simple supports. Theload and the deflection in the middle of the span were recorded as shown inTable P10.22.a. Using a computer spreadsheet program, plot the load–deflectionrelationship.b. Plot the proportional limit on the graph.c. Calculate the modulus of rupture (flexure strength).
Three wooden beams and two steel plates are securely bolted together to form the composite member shown. Using the data given in
the table, determine the largest permissible bending moment when the member is bent about a horizontal axis. Take x = 6.5 in.
Modulus of elasticity
Allowable stress
Wood
2 x 10° psi
2000 psi
2 in. 2 in. 2 in.
Lin.
X
Steel
29 × 10° psi
22,000 psi
The largest permissible bending moment when the member is bent about a horizontal axis is
134.770 kip-in.
Chapter 10 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 10 - What are the two main classes of wood? What is the...Ch. 10 - Prob. 10.2QPCh. 10 - Prob. 10.3QPCh. 10 - Discuss the anisotropic nature of wood. How does...Ch. 10 - Prob. 10.5QPCh. 10 - Prob. 10.6QPCh. 10 - Prob. 10.7QPCh. 10 - Prob. 10.8QPCh. 10 - Prob. 10.9QPCh. 10 - Prob. 10.10QP
Ch. 10 - Prob. 10.11QPCh. 10 - Prob. 10.12QPCh. 10 - Prob. 10.13QPCh. 10 - Prob. 10.14QPCh. 10 - Prob. 10.15QPCh. 10 - Prob. 10.16QPCh. 10 - Prob. 10.17QPCh. 10 - Prob. 10.18QPCh. 10 - Prob. 10.19QPCh. 10 - Prob. 10.20QPCh. 10 - Prob. 10.21QPCh. 10 - Prob. 10.22QPCh. 10 - Prob. 10.23QPCh. 10 - A wood specimen was prepared with actual...Ch. 10 - A pine wood specimen was prepared with actual...Ch. 10 - Prob. 10.26QPCh. 10 - Prob. 10.27QPCh. 10 - Prob. 10.28QPCh. 10 - Prob. 10.29QPCh. 10 - Prob. 10.30QPCh. 10 - Prob. 10.31QPCh. 10 - Prob. 10.32QPCh. 10 - Prob. 10.33QP
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- Determine the y-bar centroid of the composite figure shown. Where: y = 20mm and x = 10 mmarrow_forwardThe composite A-36 steel bar shown is made from two segments, AB and BD, having cross-sectional areas of AB = 616 mm2 and BD = 1243 mm². Determine the vertical displacement (in mm) of B relative to D. Modulus of Elasticity = 210 GPa. X = 1026 mm, Y = 786 mm, Z= 545 mm NOTE: Input the MAGNITUDE ONLY. Compute and express your final answer in 5 decimal places. 75 kN A 20 KN 40 kN d D X 20 kN 40 kN Zarrow_forwardA wood specimen was prepared with actual dimensions of 25 mm * 25 mm * 150 mm and grain parallel to its length. Displacement was measured over a 100 mm gauge length. The specimen was subjected to compression parallel to the grain to failure. The load-deformation results are as shown in Table P10.24. TABLE P10.23 Deflection Load (N) (10 3 mm) 445 709 890 1412 1335 2113 1779 2825 2224 3556 2669 4234 3114 4935 3559 5644 4003 6353 4448 6995 4893 7996 5338 9131 5783 10287 6228 11902 (failure) TABLE P10.2 4 Load (N) Displacement (mm) 31 0.30 45 1.73 387 4.17 2358 4.57 7584 5.28 12740 5.99 16859 6.81 20489 7.62 23745 8.23 22757 9.14 19875 9.75 19265 10.5 a. Using a computer spreadsheet program, plot the stress-strain relationship. b. Calculate the modulus of elasticity. c. What is the failure stress?arrow_forward
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