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- A 12.5-mm round structural steelrod is loaded in tension to fracture. The 200-mm gagelength of the rod was marked off in 25-mm lengthsbefore loading. After the rod broke, the strain in the50-mm containing the fracture was found to be 0.45mm/mm, and the total elongation of the other 150 mmwas found to be 37.5 mm. Determine the averagestrain for the 200-mm gage length.Subject: Steel design- Bolted Steel Connection *Use NSCP 2015 formula/guide to solve this problem *Use Handwritten A plate having a width of 400 and a thickness of 20mm is to be connected to two plates with thickness of 12mm by four rivets. The allowable shear stress for the rivets is 150 MPa and for bearing is 1.35 Fy. If the yield strength and the ultimate strength is 248 MPa and 400 MPa respectively. Determine the Following: a.) Required diameter of rivets w/o exceeding the aloowable stress in the shear. b.) Required diameter of rivets w/o exceeding the allowable stress in bearing. c.) Required diameter of rivets w/o exceeding the allowable stress in tension.Problem 7-29 7-29 Two materials with 10 mm² contact area have been tested to determine how much adhesive wear takes place when they are run together. Table P7-1 shows the test parameters and average depth-of-wear results for 350 tests. Find the average wear coefficient if the Brinell hardness of the softer of the two materials tested is HB 277 Table P7-1 Data for Problem 7-29 F No. m mm Tests 100 5 000 0.180 100 200 5 000 0.372 75 200 7 500 0.550 75 400 10 000 1.470 100
- Suppose the welded steel bracket shown in the figure is bolted underneath a structural-steel ceiling beam to support a fluctuating vertical load imposed on it by a pin and yoke. The bolts are made of 2-in coarse thread SAE grade 8, tightened to recommended preload for nonpermanent assembly. The stiffnesses have already been computed and are kp= 4 MIbf/in and km = 16 Mlbf/in. The fatigue design factor nfis given as 3.5. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. Variable Name Value Symbol Bolt Stiffness 4 MIbf/in Kb Material Stiffness 16 MIbf/in Km Fatigue Design Factor 3.5 nf Grip Length 1.5 in Bolt Grade SAE 8 G Bolt Diameter 1/2 d Find the yielding factor of safety no, the load factor n, and the joint separation factor no. The yielding factor of safety np is The load factor nį is The joint separation factor no isH.W (2): A 37.5 mm round bar has been machined from AISI 1050 cold-drawn round bar Su =689 MPa. This part is to withstand a fluctuating tensile load varying from 0 to 72.5 kN. Because of the design of the ends and the fillet radius, a fatigue stress-concentration factor of 1.85 exists. Find the factor of safety F.S.A flanged bolt coupling is used to connect a solid shaft 100 mm in diameter to a hollow shaft 100 mm in outside diameter and 90 mm in inside diameter. If the allowable shearing stress in the shafts and in the bolts is 53 MPa, how many 16 mm-diameter steel bolts must be used on a 300 mm-diameter bolt circle so that the coupling will be as strong as the weaker shaft? This is an exception to our two decimal rule -- so our answer here must be rounded to the NEXT whole number.
- A 15" long rod, pinned at both ends, with radius of 1/2 ", made from 6061 T6 Aluminum is subjected to a compressive axial load of 10 Kips. Question 4 of 6: What is the axial strain in the rod? ( in percent) O .0013 O .13 O 1.3 O 13Q1: Choose the correct answer 1. If the control column slenderness (KL/r) for W12x72 section column equal to 47.73. The elastic critical buckling stress (F.) is a) 127.6 ksi b) 58.7 ksi c) 100 ksi 2. If the size of welding equal to 0.25" and length of weld equal to 5 then the value of ß is a) 0.8 b) 2 c) 1 3. If The tension member is a 4 in. x 3/8 in. thick rectangular bar. It is welded to a 1/2 in. thick gusset plate then the minimum size of welded is a)3/8" b) 1/2" c) none of a or b 4. If The tension member is a 4 in. x 3/8 in. thick rectangular bar. It is welded to a 1/2 in. thick gusset plate then the minimum size of welded is a)1/4" b) 7/16" c) none of a or b 5. If Fexx for used welded connector is 70 ksi then Fw is equal to b) 42 a) 18 c) 70You are to evaluate the feasibility of a cencrete infill in a hollow structural steel section subjected only to pure berding Specifically, you are tasked to determine if there will be an increase in the bending mament capacity from a hollow structural square steel section with the following dimensions shown to a concrele filled steel tube 6 mm 100 mm Material Properties: Yield stress af Steet fy, steel - 420MPa Etaul = 200G Pa Maximum compressive strength of Concrete: fe = 27M Pa Eurede = 4700VT.(e und Eanerate in MPa Under elastic stress analysis, the stress distribution within the concrete filed steel tube is as follows, NA o, - EE, Steel Stress Concrete below the NA Is not considered for analysis Concrete Stress Distribution Distribution This stress distribution is for the untransformed cross section. Moreover, since concrele carry little to na tensile stresses, the portion of the concrete below the neutral axis which resist tensile stresses will nat be considered in the anahlysis…
- A flanged bolt coupling consists of 9-16-mm-diameter steel bolts on a bolt circle 400 mm in diameter, and 5-16-mm-diameter steel bolts on a concentric bolt circle 200 mm in diameter. What torque can be applied without exceeding a shearing stress of 68 MPa in the bolts? Answer must be in kN-m. « Previous Next » Not saved Submit Quiz ENG USA flanged bolt coupling is used to connect a solid shaft 110 mm in diameter to a hollow shaft 100 mm in outside diameter and 80 mm in inside diameter. If the allowable shearing stress in the shafts and in the bolts is 58 MPa, how many 16 mm-diameter steel bolts must be used on a 300 mm-diameter bolt circle so that the coupling will be as strong as the weaker shaft? This is an exception to our two decimal rule -- so our answer here must be rounded to the NEXT whole number. Previous Next ENG USa.)What torque can be applied without exceeding the shearing stress of 60 MPa in the steel bolts and 40 MPa in the aluminum bolts? (in kNm) b.)Using the Torque calculated above, what is the maximum shearing stress in the steel bolts? (in MPa) c.)Using the Torque calculated above, what is the maximum shearing stress in the aluminum bolts? (in MPa)