Question 1: Design a 15 ft long rod subjected to a tensile load of 30 kips. Using a factor of safety of 1.85 based on the yield stress, calculate the required rod diameter if it is to be made of steel with a yield stress of 45 ksi.
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A: given- original length L=200 mmFinal length Lf=200.2 mmLoad P=20 KN
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A: αal=12.8×10-6/°Fαbr=9.6×10-6/°Fαst=9.6×10-6/°FEal=10.6×106 lb/inEbr=15×106 lb/inEst=128×106 lb/in
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A: Cross-section of steel bar = 0.55x4.05 in2 Thickness (t) = 0.55 inBreadth (b) = 4.05 inLoad P = 30.5…
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A: aWe knowΔL=PLAE0.1=5.851000100π4102EE=74,485Nmm2E=74,485Mpa
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- A tensile test was performed on a metal specimen having a circular cross section with a diameter 0. 510 inch. For each increment of load applied, the strain was directly determined by means of a strain gage attached to the specimen. The results are, shown in Table: 1.5.1. a. Prepare a table of stress and strain. b. Plot these data to obtain a stress-strain curve. Do not connect the data points; draw a best-fit straight line through them. c. Determine the modulus of elasticity as the slope of the best-fit line.A high-strength steel band saw, 27 mm wide, runs over pulleys 1100 mm in diameter. What minimum thickness of the steel band can be used without exceeding a flexural stress of 350? Assume E = 210 GPa. Answer must be in mm.SHOW COMPLETE ANSWER AND ILLUSTRATION FINAL ANSWER IN 3 DECIMAL PLACES Problem 3: A steel wire 10 m long, hanging vertically supports a tensile load of 2 kN. 1. Determine the required diameter if the stress is not to exceed 140 MPa and the total elongation is not to exceed 5 mm. Use E = 200 GPa. Neglect the weight of the rod. 2. Determine the required diameter if the stress is not to exceed 140 MPa and the total elongation is not to exceed 5 mm. Use E = 200 GPa. Consider the weight of the bar and = 7,850 kg/m3
- A drill rod with a diameter of 1/2 in. is made of high-strength steel alloy with a shear modulus of 11.6 * 106 psi. The rod is to be subjected to a torque T.What is the minimum required length L of the rod so that the cross section at one end can be rotated 60° with respect to the other end without exceeding an allowable shear stress of 45 * 103 psi?Tensile test data for wires, used to support the beam, is shown in table-1. Gauge length during tensiontest was kept 20mm and the diameter of wire was 8mm. Draw the stress-strain diagram at suitable scalefor given data and determine the yield strength, ultimate strength, modulus of elasticity, modulus oftoughness and modulus of resilience.An SSTM A36 strucural steel beam 3.6 m long is placed between two rigid supports when the temperature is 15 0C. What is the stress developed in the beam if the temperature rises to 50 0C? ___ MPa. Assume that the proportional limit is 235 MPa, and that lateral buckling is prevented. Calculate your answer to 1 decimal place.
- A 5ft long rod with a 0.63 inch diameter is subjected to a 10,661lb tensile load. What is the tensile stress in ksi? Answer to two decimal places.If the yield stress in part c is considered failure stress, what is the maximumworking stress to be applied to this material if a factor of safety of 1.5 is used?Calculate the stress in a No. 7 rebar subjected to a tensile load of 10,600 lb.
- A 2500 lb horizontal bar is supported by three 3/16-inch diameter wires as shown. The wires are symmetrically spaced and 20 feet long. The two outer wires are steel and the middle wire is brass. Calculate: a) Stresses in the wiresA rectangular steel bar 0.5 inch thickness by 1.5 inches width and 220 ft long is subjectedto a 6000 lbs tensile load acting along its width. Find the deformation along its length andthickness if poison’s ratio is 0.27.A steel rod with a cross sectional area of 120〖mm〗^2 is stretched between two fixed points. The tensile load at 20°C is 4200N. What will be the stress at-25°C? α=11.7x〖10〗^(-6)/°C and E = 200GPa. See figure 06