Concept explainers
(a)
Find the average strength-to-weight ratio for the aluminum alloy.
(a)
Answer to Problem 29P
The average strength-to-weight ratio for the aluminum alloy is
Explanation of Solution
Given data:
Use Table 17.3 in the textbook.
Specific weight of aluminum alloy is
Use Table 17.4 in the textbook.
Yield strength of aluminum alloy is
Calculation:
For Aluminum alloy:
Given,
Substitute
Substitute the unit
Thus, the average strength-to-weight ratio for the aluminum alloy is
Conclusion:
Hence, the average strength-to-weight ratio for the aluminum alloy is
(b)
Find the average strength-to-weight ratio for the titanium alloy.
(b)
Answer to Problem 29P
The average strength-to-weight ratio for the titanium alloy is
Explanation of Solution
Given data:
Use Table 17.3 in the textbook.
Specific weight of titanium alloy is
Use Table 17.4 in the textbook.
Yield strength of titanium alloy is
Calculation:
For titanium alloy:
Given,
Substitute
Substitute the unit
Thus, the average strength-to-weight ratio for the titanium alloy is
Conclusion:
Hence, the average strength-to-weight ratio for the titanium alloy is
(c)
Find the average strength-to-weight ratio for the steel.
(c)
Answer to Problem 29P
The average strength-to-weight ratio for the steel is
Explanation of Solution
Given data:
Use Table 17.3 in the textbook.
Specific weight of steel is
Use Table 17.4 in the textbook.
Yield strength of steel (structural) is
Calculation:
For steel:
Given,
Substitute
Substitute the unit
Thus, the average strength-to-weight ratio for the steel is
Conclusion:
Hence, the average strength-to-weight ratio for the steel is
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Chapter 17 Solutions
EBK ENGINEERING FUNDAMENTALS: AN INTROD
- Consider a 1 m-long bar of 2024-T81 aluminum alloy with a 20mm-diameter and the following property data: E=70GPa Y.S.=410MPa T.S.=480MPa %Elongation at failure=8% What will be the length of the bar under a structural load of 1.2×10^5N in tension? Your answer should be in units of meters (m).arrow_forwardMeasurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01, 0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported? Deformation of a steel specimen during the tension test (in.) Tensile strength of steel (psi) Modulus of elasticity of aluminum (MPa) Weight of aggregate in a sieve analysis test (grams) Compressive strength of portland cement concrete (psi) Moisture content in a concrete masonry unit (percent) Asphalt content in hot-mix asphalt (percent) Specific gravity of wood Distance between New York City and Los Angeles (miles) Dimensions of a computer microchip (mm)arrow_forwardConsider the 1040 carbon steel listed in the textbook's Table 6.1: A 20mm-diameter bar of this alloy is used as a structural member in an engineering design. The unstressed length of the bar is precisely 1m. The structural load on the bar is 1.2×10^5N in tension. What will be the length of the bar under this structural load (in meters)? Values from table: E [GPa (psi)] = 200(29*10^6) Y.S [MPa (ksi)] = 600(87) T.S [MPa (ksi)] = 750(109) Percent Elongation at failure = 17arrow_forward
- A brass alloy has a yield strength of 280 MPa, a tensile strength of 390 MPa,and an elastic modulus of 105 GPa. A cylindrical specimen of this alloy 12.7 mm in diameter and 250 mm long is stressed in tension and found to elongate 7.6 mm. On the basis of the information given, is it possible to compute the magnitude of the load that is necessary to produce this change in length? If so, calculate the load. If not, explain why.arrow_forward3. What is the weight of a steel ball whose radius is 20 inches? The density of steel is 7.8 g/cm³.arrow_forwardAnswer the following questions based on the given information in the table and further calculation (if needed for any missing parameter, e.g. strain at yield point). Assume all metals started with the same shape and size before the tensile tests occurred. Material A B C D E Yield Strength (MPa) 105 600 430 355 The material that experienced the greatest percent reduction in area is material The hardest material is material The hardest material has Tensile Strength (MPa) The material that experienced the greatest percent reduction in area has 135 850 The material that experienced the largest change in shape before plastic deformation occurred is material The stiffest material is material The stiffest material has 535 365 Fracture before yielding The material that experienced the largest change in shape before plastic deformation occurred has Strain at Fracture [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] [Choose ] 0.45 0.15 0.20 0.25 Fracture Strength (MPa)…arrow_forward
- A homogenous steel rod has a diameter of 1.5 inches. When a load is applied, it deformed to about 0.045 inches. If the length of the rod is 6 ft and the modulus of elasticity is E=29x10^6 psi. Determine the force applied in kilopounds (kips).arrow_forwardThe rectangular metal block shown in Figure is subjected to tension within the elastic range. The increase in the length of a is 0.05 mm and the Poisson’s ratio for the material is 0.33. If the original lengths of a and b were 50 mm and 25 mm, respectively, what is the change in the length of b? Is this change expansion or contraction?arrow_forward2. In engineering, the modulus of elasticity is a way to measure how much an object deforms along an axis when opposing forces are applied among that axis. The formula can be expressed as E (F2-F)Lo where E is (82-81)A' %3D the modulus of elasticity, F is the axial force, & is a deformation measure, Lo is the original length of the object, and A is the cross-sectional area. Part A: Reaange the elasticity formula to find the cross-sectional area, A.arrow_forward
- 1.19 A brass alloy has a yield strength of 280 MPa, a tensile strength of 390 MPa, and an elastic modulus of 105 GPa. A cylindrical specimen of this alloy 12.7 mm in diameter and 250 mm long is stressed in tension and found to elongate 7.6 mm. On the basis of the information given, is it possible to compute the magnitude of the load that is necessary to produce this change in length? If so, calculate the load. If not, explain why.arrow_forwardSubject: STRENGTH OF MATERIALS (Civil Engineering) Round off to three decimal placesarrow_forwardThe density (mass>volume) of aluminum is 5.26 slug/ft3. Determine its density in SI units. Use an appropriate prefix.arrow_forward
- Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning