Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 8, Problem 8.1P
To determine
The best material for bolt.
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a. Which of the following gives the approximate modulus elasticity of the
The stress-strain diagram for a steel alloy having an original diam. of 12 mm and a
material?
gauge length of 50 mm is given in the figure.
b. Which of the following gives the load on the specimen that causes
yielding?
c. Which of the following gives the ultimate load the specimen will
(8) MPa
ultimate strength-
80
support?
70
60
repture' strength
yäerd põint-
50+
40
propórtional limit
30
20+
10+
0 .0005 .001.0015 .002 .0025 .003 .0035
E(mm/mm)
The light rigid bar ABCD shown is pinned at C and connected to two vertical rods. The bar
was initially horizontal, and the rods were stress-free before the load P = 20 KN is applied.
%3D
Steel
E200 GPa
A-600mm
L1 m
2.0 m
0.6 m
1.5 m
Pa20 KN
Aluminum
E-70 GPa
A=900mm
L-1.5 m
What is the ratio of the deformation of steel to deformation of aluminum?
An AISI 1040 hot-rolled steel [E = 207 GPa; α = 11.3×10–6/°C] bar is held between two rigid supports. The bar is stress free at a temperature of 30°C. The bar is then heated uniformly. If the yield strength of the steel is 429 MPa, determine the temperature at which yield first occurs.
Chapter 8 Solutions
Materials Science And Engineering Properties
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- A tensile test was performed on a metal specimen having a circular cross section with a diameter of 1 2 inch. The gage length (the length over which the elongation is measured) is 2 inches. For a load 13.5 kips, the elongation was 4.6610 3 inches. If the load is assumed to be within the linear elastic rang: of the material, determine the modulus of elasticity.arrow_forwardEstimate the elastic and plastic strain at the ultimate tensile strength in the low-carbon steel specimen in Figure 6.16.arrow_forwardCompare the engineering and true secant elastic moduli for the natural rubber in Example Problem 6.2 at an engineering strain of 6.0. Assume that the deformation is all elastic.arrow_forward
- A strip of high-strength steel has a length of 30 cm and a cross section of 1 mm by 20 mm. The modulus of elasticity is 200 GPa and Poison’s ratio is 0.27. It is subjected to an axial load of 15000 N, and it is instrumented with two axial strain gauges with R= 120 Ω and a gauge factor of 2.10. The two fixed resistors are also 120 Ω, and the supply voltage is 2.5 V. The bridge is adjusted to zero voltage output before load is applied. Find the output of the bridge with load applied.arrow_forwardThe aluminum (E=15x10^10psi, α=11.6x10^-6/°F) shell is fully bonded to the brass (E=10.6x10^6psi, α=12.9x10^-6/°F) sore, and the assembly is unstressed at a temperature of 78°F. Considering only axial deformations, determine the stress when the temperature reaches 180°F (a) in the brass core (b) in the aluminum shellarrow_forwardSteel, Brass, and Copper rods are connected as shown in the figure. Initially, the temperature was 15 degrees Celsius and the stress on the bars is zero. Eventually, the temperature increased to 25 degrees Celsius. Determine the total deformation on the brass. Steel Brass Copper Est = 200 GPa 12(10-)/°C apr Ebr Ecu 17(10-)/°C 120 GPa 100 GPa %3D ast = 21(10-6)/°C acu Acu = 515 mm? |Ast 200 mm2 Abr = 450 mm2 300 mm -200 mm 100 mm O -0.0109mm O 0.0241mm O -0.0241mm O 0.0109mm oooOarrow_forward
- (b) (i) A tensile test specimen made from 0.4% C steel has a circular cross section of diameter d mm and a gauge length of 25 mm. When a load of 4500 N is applied during the test, the gauge length of the specimen extends to 25.02 mm. If the Young's Modulus of the steel is 199 GPa, calculate the diameter of the tensile test specimen used. 4arrow_forward2. The tensile link shown is flat, is 5 mm. thick, and carries an axial load P = 1350 N. a. Compute the maximum stress in the link. b. This link is to be made of plastic. From the list of plastics listed as follows, select an appropriate material. Allowable Stress (MPa) 15 55 Plastic Material Acronym HDPE High-density polyethylene Polycarbonate Polypropylene High-impact polystyrene c. For your choice of material from (b), what is the maximum load P that can be carried by the link? PC PP HIPS 25 30 30 mm 10 mmarrow_forwardSample: Malleable Steel (AISI 4145) Original Diameter: 6.14mm Gauge Length: 55 mm Final Length: 68.12 mm Final Diameter: 3.54mm Load (kN) Deformation (mm) Stress (MPa) 12.95 Strain (%) 0.3838 0.54 0.7841 0.95 26.48 1.3899 1.63 1.9485 2.07 3.3090 3.10 4.5821 4.22 5.9359 5.03 7.0340 5.51 8.2413 6.22 10.9446 7.22 13.1951 8.18 12.8228 8.77 12.2583 9.11 12.5915 9.61 13.2536 10.33 13.6636 10.71 13.9772 11.35 14.5433 12.63 15.1155 13.88 15.4970 15.10 15.6484 17.09 15.4031 17.79 14.7655 18.73 13.6721 19.28 10.4617 19.88arrow_forward
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