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 10.26QP
To determine
The engineering stress, the engineering strain, and the toughness of the wood specimen.
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A wood specimen was prepared with actual dimensions of 25 mm * 25 mm *150 mm and grain parallel to its length. Displacement was measured over a100 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.
a. Using a computer spreadsheet program, plot the stress–strain relationship.b. Calculate the modulus of elasticity.c. What is the failure stress?
Q.2.
The stress-strain diagram of a reinforcement steel having a cross-sectional diameter of 12 mm
diameter and 100 mm gage length is determined after its tensile strength test as follows. Based on the stress-
strain diagram determine the followings properties of the material (Poisson's ratio of the material is 0.32) :
600
a) Modulus of elasticity
550
500
b) Yield strength
450
c) Toughness
400
350
d) Resilience
300
e) Shear modulus
250
200
f) Bulk modulus
150
g) Ductility as described by
100
percent change in length
50
0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
0.11 0.12
0.13 0.14 0.15 0.16 0.17 0.18
Strain
Note: Show your methods and calculations clearly.
Stress, MPa
A wood beam is strengthened using two steel plates as shown in the figure below.
*Inserted Photo*
The beam has simple supports and an overhang and is subjected to a point load and a uniform load as shown in the figure below.
Calculate the maximum tensile and compressive stresses of the beam. Assume that Ew = 11 GPa and Es = 200 GPa. (Enter your answers in MPa. Use the deformation sign convention.)
maximum tensile stress in wood ? MPa
maximum tensile stress in steel ? MPa
maximum compressive stress in wood ? MPa
maximum compressive stress in steel ? MPa
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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