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 3, Problem 3.48QP
How can the flaws in steel and welds be detected? Discuss the concept of a nondestructive test used for this purpose.
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Chapter 3 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 3 - What is the chemical composition of steel? What is...Ch. 3 - Why does the ironcarbon phase diagram go only to...Ch. 3 - Draw a simple ironcarbon phase diagram showing the...Ch. 3 - What is the typical maximum percent of carbon in...Ch. 3 - Calculate the amounts and compositions of phases...Ch. 3 - Briefly discuss four heat treatment methods to...Ch. 3 - Define alloy steels. Explain why alloys are added...Ch. 3 - Prob. 3.8QPCh. 3 - Specifically state the shape and size of the...Ch. 3 - What are the typical uses of structural steel?
Ch. 3 - What is the range of thicknesses of cold-formed...Ch. 3 - Why is coil steel used for cold-formed steel...Ch. 3 - If a steel with a 33 ksi yield strength is used...Ch. 3 - Why is reinforcing steel used in concrete? Discuss...Ch. 3 - What is high-performance steel? State two HPS...Ch. 3 - Name three mechanical tests used to measure...Ch. 3 - The following laboratory tests are performed on...Ch. 3 - Sketch the stress-strain behavior of steel, and...Ch. 3 - Three steel bars with a diameter of 25 mm and...Ch. 3 - Three steel bars with a diameter of 0.5 in. and...Ch. 3 - Draw a typical stressstrain relationship for steel...Ch. 3 - Getting measurements from Figure 3.18, determine...Ch. 3 - A steel specimen is tested in tension. The...Ch. 3 - A steel specimen is tested in tension. The...Ch. 3 - A No. 10 steel rebar is tested in tension. By...Ch. 3 - A mild steel specimen originally 300 mm long is...Ch. 3 - A tension stress of 70 ksi was applied on a 12-in....Ch. 3 - A tensile stress is applied along the long axis of...Ch. 3 - A cylindrical steel alloy rod with a 0.5 in....Ch. 3 - A round steel alloy bar with a diameter of 0.75...Ch. 3 - A 19-mm reinforcing steel bar and a gauge length...Ch. 3 - Testing a round steel alloy bar with a diameter of...Ch. 3 - During the tension test on a steel rod within the...Ch. 3 - A grade 36 round steel bar with a diameter of 0.5...Ch. 3 - A high-yield-strength alloy steel bar with a...Ch. 3 - Estimate the cross-sectional area of a 350S125-27...Ch. 3 - An ASTM A615 grade 60 number 10 rebar with a gauge...Ch. 3 - A 32-mm rebar with a gauge length of 200 mm was...Ch. 3 - A steel pipe having a length of 3 ft. an outside...Ch. 3 - A steel pipe having a length of 1 m, an outside...Ch. 3 - A drill rod with a diameter of 10 mm is made of...Ch. 3 - A drill rod with, a diameter of 1/2 in. is made of...Ch. 3 - Prob. 3.43QPCh. 3 - An engineering technician performed a tension test...Ch. 3 - A Charpy V Notch (CVN) test was performed on a...Ch. 3 - Prob. 3.46QPCh. 3 - Prob. 3.47QPCh. 3 - How can the flaws in steel and welds be detected?...Ch. 3 - Determine the welding zone classification of A36...Ch. 3 - Briefly define steel corrosion. What are the four...Ch. 3 - Discuss the main methods used to protect steel...
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- 35. What grade of steel is most commonly used today in the production of W-shapes, and what are its yield stress and tensile stress?arrow_forwardWhat is the key element that influences the properties of iron?arrow_forwardA 32-mm rebar with a gauge length of 200 mm was subjected to tension to fracture according to ASTM E-8 method. The load and deformation data were as shown in Table P3.33. Using a spreadsheet program obtain the following: a. A plot of the stress-strain relationship. Label the axes and show units. b. A plot of the linear portion of the stress-strain relationship. Determine modulus of elasticity using the best-fit approach. c. Proportional limit. d. Yield stress. e. Ultimate strength. f. If the rebar is loaded to 390 kN only and then unloaded, what is the permanent change in length? TABLE P3.3 3 Load (kN) Displacement (mm) Load (kN) Displacement (mm) 472.9 8.4 62.2 0.1 487.1 9.7 188.9 0.2 496.4 11.1 329.8 0.4 505.7 12.4 383.4 1.7 512.8 13.7 426.0 4.0 522.6 15.3 447.3 5.9 532.4 18.5 462.5 7.2 525.9 22.4arrow_forward
- Calculate the steel ratio that will produce a tension-controlled failure if compressivestrength f’c = 28 MPa and steel yield strength fy the answer is 0.02167 but i don't know how to solve it please helparrow_forwardA No. 10 steel rebar is tested in tension. By monitoring the load reading of the testing machine, it was found that the specimen yielded at a load of 41,600 lb and fractured at 48,300 lb.a. Determine the tensile stresses at yield and at fracture.b. Estimate how much increase in length would occur at 70% of the yield stress in a 2-in. gauge length.arrow_forwardExplain/Draw Stress-Strain graph of mild steel when subjected to tensile force. Also write down the minimum Tensile (yield, ultimate strengths) and Ductility (percent elongation) requirements for Grade 60 (G60) as per ASTM A615arrow_forward
- What is the approximate value of the tensile strength governed by yielding of the cross- section of a roof truss diagonal 100 x 75 x 6 mm (fy = 250 MPa) connected to the gusset plate by 4 mm welds as shown in figure? (Take partial safety factor as 1.10) 1 H 100 4 mm weld, 140 mm long 75 A₂ = 1010 mm² Weld 310 mm longarrow_forwardIdentify the following weld defects if it is a Structural or Dimensional Defect. Porosity Warpage Slag inclusion Crack Undercut - Longitudinal distortion Spatter Angular distortion Transverse shrinkage Bulking distortionarrow_forwardA bar made of high strength low-carbon steel of GRade 50 (yield strength gauge 50 ksi) , is 0.5 inchthick and 1.2 inch wide. The ultimate tensile strength of the steel is 70 ksi. Determine the load at whichthe bar starts to yield and also determine the load when the bar is likely to fracture. Taking the originalgauge length to as 5 inches and Young’s modulus of steel as 30 x 10^6 psi, estimate the new gauge lengthwhen the specimen is stressed at 2/3 of the yield stress.arrow_forward
- 412/2021. HW:No.2 (The deadline for submitting your homework on Snday 042814). Three steel bars with a diameter of 25 mm and carbon contents of 0.2, 0.5, and 0.8%, respectively. The specimens were subjected to tension until rupture. The load versus deformation results were as shown in Table below If the gauge length is 50 mm, determine the following: a. The tensile stresses and strains for each specimen at each load increase. b. Plot stresses versus strains for all specimens on one graph. c. The modulus of elasticity for each specimen. d. ultimate strength for each specimen. e. The strain at rupture for each specimen. f. the percentage of the total elongation. 3 Specimen No. Carbon Content (%) 1 2 0.2 0.5 0.8 Deformation (mm) Load (kN) 0.00 0. 0. 0. 0.07 133 133 133 0.10 137 191 191 0.15 • 142 196 285 0.50 147 201 324 1.00 140 199 383 2.50 155 236 447 5.00 196 295 491 (Rupture) 7.50 226 336 10.00 241 341 12.50 218 304 (Rupture) 13.75 196 (Rupture) Stress Strain Curve and Explanation…arrow_forward*please answer all questions* and write a proper free body diagram and answer in complete solution. Thank youarrow_forwardPuzzler: Most steel reinforcing bars manufactured in the U.S. exhibit a sharp yield plateau. Two exceptions, however, are bars that are quenched and tempered and bars that are coiled immediately after they are hot rolled. The coiled bars are later straightened by a fabricator. Both (1) quenched-and-tempered bars and (2) straightened bars have stress-strain curves that are initially linear, but yielding is gradual, producing what is described as a "round-house" curve. The reason for the round-house behavior is the same for both types of steel. Why do these two types of reinforcing steel exhibit gradual yielding rather than a sharp yield plateau even if the same steel exhibits a sharp yield plateau if it is not quenched and tempered or coiled?arrow_forward
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