Shear breaking strength of the solder used in the brazing joint in the figure. tIK=15daN/mm2 since the factor of safety is s=3, the torsion that the connection can transmit statically Find the value of the moment. dişli çark d=5 mim mil b=6 sert lehim
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- TT α = 15° Pin- Cable- Figure 1 A lifeboat hangs from a ship's two davits, as shown in Figure 1. A pin of diameter d=20 mm passes through each davit and supports two pulleys, one on each side of the davit. Cables attached to the lifeboat pass over the pulleys and wind around winches that raise and lower the lifeboat. The lower parts of the cables are vertical and the upper parts make an angle a=15° to the horizontal. The allowable tensile force in each cable is 8 kN, and the allowable shear stress in the pins is 27.5 MPa. The weight P that will be carried in the lifeboat and the weight of the boat, W-6.7 kN, have a common line of action which passes through the middle of the two small pulleys attached to the boat. a. Draw the free body diagram (FBD) of the lifeboat and express the tensile force of the cables I as a function of the useful load P. b. Draw the FBD of the bow pin and express the external force V which the davit applies to the pin as a function of the tensile force of the…Two plates of which (2.5 d) and d as outer and inner diameter respectively and thickness 25 mm each are held together by means of a bolt. The bolt material S-400 N/mm² and E210000 N/mm² while plate material E= 72000 N/mm². The initial preload in the bold is 6.0 KN and force on the joint is 12 kN. Find out size of bolt assuming factor of safety 2.0.Repeat 1.3-9 but use the method of sections go find member forces in AC and BD.
- A lifeboat hangs from two ship's davits. as shown in the figure. A pin of diameter d = 0.80 in. passes through each davit and supports two pulleys. are on each side of the davit. Cables attached to the lifeboat pass over the pulleys and wind around winches that raise and lower the lifeboat. The lower parts of the cables are vertical and the upper parts make an angle a =15° with the horizontal. The allowable tensile force in each cable is 1800 lb, and the allowable shear stress in the pins is 4000 psi. If the lifeboat weighs 1500 lb, what is the maximum weight that can be carried in the lifeboat?Repeat Problem 11.2-14 using L = 12 ft, ß = 0.25 kips/in., ßRl= 1.5ßL2, and ßR2= 2 ßR1.Two steel wines support a moveable overhead camera weighing W = 28 lb (see figure part a) used For close-up to viewing of field action at sporting, events. At some instant, wire I is at an angle a = 22° to the horizontal and wire 2 is at angle fi = 40°. Wires I and 2 have diameters of 30and 35 mils, respectively. (Wire diameters are often expressed in mils; one mil equals 0.001 in.) (a) Determine the tensile stresses s and s2 in the two wires. (b) If the stresses in wires 1 and 2 must be the same, what is the required diameter of wire 1 ? (c) To stabilize the camera for windy outdoor conditions, a third wire is added (see figure part b). Assume the three wires meet at a common point coordinates (0, 0. 0) above the camera at the instant shown in figure part b. Wire I is attached to a support at coordinates (75 ft, 48 ft, 70 Ft). Wire 2 is supported at (-70 ft. 55 ft, 80 Ft). Wire 3 is supported at (-10 ft. -85 Ft, 75 ft). Assume that all three wires have a diameter of 30 mils. Find the tensile stresses in all three wires
- Two cables, each having a length i. of approximately 40 m, support a loaded -container of weight W (see figure). The cables, which have an effective cross-sectional area A = 48.0 mm2 and effective modulus of elasticity E = 160 GPa. are identical except that one cable is longer than the other when they are hanging separately and unloaded. The difference in lengths is d = 100 mm. The cables are made of steel having an elastoplastic stress-strain diagram with a r= 500 MPa. Assume that the weight ft' is initially zero and is slowly increased by the addition of material to the container. (a) Determine the weight Wythat lirsl produces yielding of the shorter cable. Also, determine the corresponding elongation 5 of the shorter cable. (b) Determine the weight Wpthat produces yielding of both cables. Also, determine the elongation Spof the shorter cable when the weight W just reaches the value Wp. (c) Construct a load-displacement diagram showing the weight W as ordinate and the elongation2.4-11 Three steel cables jointly support a load of 12 kips (see figure). The diameter of the middle cable is 3/4 in. and the diameter of each outer cable is 1/2 in. The tensions in the cables are adjusted so that each cable carries one-third of the load (ie., 4 kip). Later, the load is increased by 9 kips to a total load of 21 kips. (a) What percent of the total load is now carried by the middle cable? (b) What are the stresses crvand 0 in the middle and outer cables, respectively? Note: See Table 2-1 in Section 2.2 for properties of cables.The rigid beam shown in Figure AN- 12 is suspended by three cables. The beam is horizontal prior to being connected to the cables and is to remain horizontal after being attached to the cables. The beam weighs 176.4 kN. 0.6 m Steel A 600 mm E 200 GPa Bronze A 900 mm E- 83 GPa Steel A= 600 mm E 200 GPa 1.0 m Figure AN-12 Which of the following most nearly gives the ratio of the force in the bronze cable to the force in the steel cables?
- Using Methods of Joints Find the force acting in all members of the truss shown in Figure T-01. B 80KN 2m A F D 2m 2m 2m 50kN100 mm 100 mm -300 mm 400 N 250 mm 400 N B D A 150 mm -500 mm- 4) If member ABC supports the shown loads and itached to a wire B0, the tension in wire B0 equs OA 1416 N MacBook Pro 1448 N 55 %24 W 2Q 2: The homogeneous wire ADOBC is bent into a semicircular arc and two straight section as shown. It is attached to a ball and socket at O and also to the cable AE. Dimensions are BC=20mm, BO=40mm,OE=90mm, R=60mm. Load conditions are; F=20 N single load direction E to D point , V=10 N force couple at B and C point , q N/mm distributed load on OB , homogeneous wire weight is neglected. Determine a) The reaction force at O point is a ball and socket b) The tension in cable AE. c) q (N/mm) distributed load value. E D 40 mm 60 my 20 mm