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What is the difference between steel and GFRP in terms of properties? Find out about the current use of GFRP in RC structures all around the globe.,

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter8: Engineering Materials

Section: Chapter Questions

Problem 6ETSQ

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The frame of a space shuttle type vehicle must have a high yield strength and high stillness, and the most important design factor is weight. Of all the materials presented in this chapter, what material might be the most suitable for the frame of a space shuttle? Assume that there will be both tensile and compressive stresses. For a space shuttle, cost is not a limiting factor. (a) You can eliminate entire classes of materials from consideration with a brief statement about their unsuitability. (b) What material has the highest specific yield strength? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (c) What material has the highest specific elastic modulus? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (d) Compare the materials with the highest specific yield strength and highest specific elastic modulus for suitability in the space shuttle frame. (C) Discuss the suitability of the top-rated material for this design from the viewpoint of the ability to produce a frame.
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Task (3) you are asked to perform tensile test on specimens of two different materials (A and B) and you obtained the stress-strain diagram of the two specimens as shown in Figure 2: 400 350 300 250 Material A 200 150 100 50 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 Strain (mm/mm) 50 Material B 30 20 10 0.02 0.04 0.06 0.08 0.1 Strain (mm/mm) Figure 2: Tensile Test Analysis Stress (MPa) Stress (MPa)
A 250 mm long rod with a 15×30 mm cross section consists of a brass layer joined by welding in the middle of 2 aluminum layers. If the magnitude of the axial and centripetal P force is 45 kN and Ea=70 GPa and Ep - 105 GPa, find the stresses in th e aluminum and brass layer.
Sketch the stress–strain behavior of steel, and identify different levels of strength. What is a typical value for yield strength of mild steel? What is theeffect of increasing the carbon content in steel on each of the each of thefollowing items?a. Yield strengthb. Modulus of elasticityc. Ductility
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PROBLEM 1) An aluminum bar carries the axial loads at the positions shown. If E=70GPA, compute the total deformation of the bar. Assume that the bar is suitably braced to prevent buckling. 0.4m D 10KN 0.8m 0.4m 5KN 0.6m A 20KN 3) What is the deformation &cn in mm? A=800 mm? A=1,200 mm²
What is the range of thicknesses of cold-formed steel structural members?
To get adequate strength and ductility for mild steel, up to What percentage of corbon content is required? а. 0.3 % b. 0.4 % О с. 1% O d. 0.6 %
A combined section of steel and copper is subjected to a compressive load. Refer to the table below for the properties of each Steel Copper Area, A 900 mm2 1,200 mm2 Modulus of elasticity, E 200 GPa 120 GPa Allowable compressive stress 140 MPa 70 MPa If the allowable strain for both materials is 0.0005, which of the following most nearly gives the maximum load the member can carry so that this allowable strain is not exceeded? Select the correct response 162.00 kN 185.00 kN 205.00 kN 175.00 kN
A combined section of steel and copper is subjected to a compressive load. Refer to the table below for the properties of each Steel Copper Area, A 900 mm2 1,200 mm2 Modulus of elasticity, E 200 GPa 120 GPa Allowable compressive stress 140 MPa 70 MPa Which of the following most nearly gives the load, in percent, carried by the copper? Select the correct response: 44.44% 55.56% 66.67% O33.33%
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)