Two plates 20 mm thickness are fastened by a number of 25 mm diameter rivets, a tensile load of 500 KN was applied, find the number of rivets required if the shearing stress is limited by 70 MPa and the bearing stress of plates is limited by 105 MPa
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- Two plates 20 mm thickness are fastened by a number of 25 mm diameter rivets, a tensile load of 500 KN was applied, find the number of rivets required if the shearing stress is limited by 70 MPa and the bearing ?stress of plates is limited by 105 MPatwo plates are fastened by a number of rivets and a tensile load of 300 KN is applied, find the number of rivets required if the shearing stress is limited by 65 MPa, and the bearing stress is limited by 95 ?MPa 300 KN 300 KN 125 mm 30 mm Dia. 25 mm 300 KN 25 mm 300 KNFind stress of a aluminum cylinder of diameter 12.8mm and gauge length 50.8mm. The force applied is 47,500N.
- The lap joint is fastened with four 3/5 in-diameter rivets. The allowable normal stress in the plates is 30 ksi, allowable shearing stress is 24 ksi for the rivets and 28 ksi for the plates in bearing. Find the maximum safe axial load P that can be applied to the joint. Assume that the load is equally distributed among the rivets. Include the necessary FBDs showing the involved internal forces in the exploratory sections. Your solutions are invalidated without the required FBDs.Find the value of strain if initial length of rod is 100 m and change in length of rod due tensile load is 0.0023 mTwo circular rods of 50mm diameter are connected by a knuckle joint, by a pin of 40 mm in diameter. If a pull of 120 kN acts at each end, find the tensile stress in the rod and shear stress in the pin.
- You are in charge of designing a new fixture for a “universal testing machine” that will attach a tensile specimen to the machine using a clevis—a U-shaped piece with holes drilled through the two arms—and a cylindrical pin that passes through the clevis and the specimen. If the maximum load exerted by the machine is 30 kN and the pin is to be made of some sort of steel, what is the minimum pin diameter needed to ensure that the shear stress in the pin does not exceed 600 MPa? Assume that the steel has similar elastic properties to pure Fe.A metal tube with inside diameter of 100mm is subjected to a tensile lad of 500kN. Find the outside diameter if the ultimate tensile stress is 600MPa and a factor of safety is 5.A lap joint, consisting of 250 mm × 75 mm wooden plates, is fastened with two(2) rows of 20 mm diameter rivets . There are three(3) rivets in a row. The working stresses are 70MPa for rivets in shear and 140 MPa for plates in bearing. Find the maximum safe axial load P that can be applied to the joint. Assume that the load is equally distributed among the rivets.
- 2) A machine frame is made of steel having Sy = 400 MPa and Ssy = 250 MPa. When loaded in a test fixture, the stresses were found to vary linearly with load. Two points on the surface were found to be most critical. With a 4-kN test load, stresses at these points were: point a, 0₁ = 200 MPa, 0₂ = 100 MPa; point b, 0₁ = 150 MPa, 0₂ = -100 MPa. Compute the test load at which the frame will experience initial yielding according to the (a) maximum-normal-stress theory, (b) maximum-shear-stress theory, and (c) maximum-distortion-energy theory. Discuss briefly the relative validity of each theory for this application. Considering all the information available, what is your best judgment of the value of the test load at which yielding would actually be expected to begin? 02= 100 MPa a 02 02=-100 MPa b 02 0₁ = 200 MPa 01 = 150 MPaA double riveted lap joint is made between 15mm thick plates. The rivet diameter and pitch are 25 mm and 75 mm, respectively. If the ultimate stresses are 400 MPa in tension, 320 MPa in shear and 640 MPa in crushing, find the minimum force per pitch which will rupture the joint. If the above joint is subjected to a load such that the factor of safety is 4, find out the actual stresses developed in the plates and rivets.The P load applied to a steel bar is transferred to the board by an annular washer. The diameter of the rod is 34mm and the inner diameter of the washer is 35.7 mm. Since it is known that the axial normal stress on the steel bar is 119 MPa, and the average bearing stress between the washer and the board should not exceed 34 MPA, how many mm is the smallest allowable outer diameter of the washer?