A shaft made of material has stress-strain curve is given by 110+120 60.23 MPa .The shaft is subjected to tensile force until the necking in tension occurs. Determine redundant work factor ?
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- Find factor of safety if the Ultimate Stress of a ductile material is 250.94 MPa. If the material is subjected to a loading condition that generates the working stress of 151.27 MPaThe coefficient of friction between the belt and the pulley is 0.3 and the maximum stress in the belt is limited to 14 N/mm width. If the larger pulley rotates at 120 r.p.m., find the maximum power that can be transmitted. Q2 Find the diameter of a shaft made of 37 Mn 2 steel having the ultimate tensile strength as 600 MPa and yield stress as 440 MPa. The shaft is subjected to completely reversed axial load of 200 kN. Neglect stress concentration factor and assume surface finish factor as 0.8. The factor of safety may be takenas 1.5. Q3 a) An universal coupling is used to connect two mild steel shafts transmitting a torque of 6000 N- m. Assuming that the shafts are subjected to torsion only, find the diameter of the shaft and the pin. The allowableshear stresses for the shaft and pin may be taken as 55 MPa and 30 MPa respectively.The cylinder of a four stroke diesel engine has the followin, specifications : Cylinder bore :150 mm Maximum pressure : 3.5 MPa Cylinder material : GCI FG200 Factor of safety : 6 Poisson's ratio : 0.25 Determine the thickness of the cylinder wall. Also calculate the apparent and net circumferential stresses in the cylinder wall.
- Two rods are connected by means of a pin joint. The axial force Pacting on the rod is 25 kN. The rods are made of plain carbon steel 45C8 (Syt = 380 N/mm²) and the factor of safety is 2.5. Take the allowable shear stress based on distortion energy theory. What is the diameter of the pin? Pin RodA steel shaft has a diameter of 25 mm. The shaft rotates at a speed of 600 r.p.m. and transmits 30 kW through a gear. The tensile and yield strength of the material of shaft are 650 MPa and 353 MPa respectively. Taking a factor of safety 3, select a suitable key for the gear. Assume that the key and shaft are made of the same material.A flywheel made of AISI 1040 HR steel has inner and outer diameters of 1.5m and 2m, respectively. a. Determine the maximum rotational speed (rpm) it can be subjected to before failure. b. Plot the tangential, radial, and total stress as a function of radius at that 2000 rpm. Take the material density as 7800kg/m3 and Poisson’s ratio 0.292. Yield strength is 290 MPa
- A clamp coupling is to transmit a power of 13 kW to a shaft rotating at a speed of 511 rpm. Calculate the diameter of the shaft if the allowable shear stress on the shaft is 45 MPa. The number of bolts connecting the two halves is six. The permissible tensile stress for the bolts is 76 MPa. The coefficient of friction between the coupling and the shaft surface may be taken as 0.3. Also, find the diameter of the bolt. Torque in Nm Diameter of shaft in mm Diameter of bolt in mmNeed help with this mechanical engineering problem. The principal stresses are: 36.276MPa, 21.003MPA, and 0 MPa ) The below 304-stainless steel cylindrical pressure vessel has an inner diameter of 100 mm and a wall thickness of 2.5 mm. The pressure vessel is subjected to an internal pressure of 18 bar'. an external pressure of 0 bar, an axial load of F = 2640 N, and a torque of T = 82 N m. -F v. (" vi. ( vii. ( viii. (4 Compute the Factor of Safety according to distortional energy (DE) theory. \ Compute the Factor of Safety according to maximum shear stress (MSS) theory. True or False. If the direction of the axial load is reversed, the FOS will be unchanged. ) True or False. If the direction of the torque is reversed, the FOS will be unchanged.A workshop crane is lifting a load of 28 kN through a wire rope and a hook. The weight of the hook etc is 15 kN. The rope drum diameter may be taken as 30 times the diameter of the rope. The load is to be lifted with an acceleration of 1.2 m/sec2. Take a factor of safety of 6 and Young's modulus for the wire rope is 80 kN/mm2. The ultimate stress may be taken as 1800 MPa. The cross-sectional area of the rope may be taken as 0.38 times the square of the wire rope diameter. Neglect the effect of impact load. Calculate the diameter of the wire rope.
- Bearing stress 4. Please provide proper discussion and illustration also complete solution and clear solution please thank you Determine the length of a square key to be used for a 3.73 kW, 1800 rpm electric motor if the motor shaft diameter is 35 mm and the width of the key is approximately one-fourth of the shaft diameter. The allowable shearing stress on the key is 2.45 MPaQuestlon 4 The drive from a motor to a machine is by means of a crossed flat belt. The shat of the motor and the machine are parallel and 1.2 meter apart. The motor pulley A turns at 1440rpm and has a diameter of 250mm. The machine B rotates at 450rpm. The belt is made of lether. The safe tensile stress is 7MPA and the density is 900kg/m. The dimensions of the belt are 50mm x 6mm. p = 0.2. Dermine: The length of the belt required The maximum power that can be transmitted The maximum torque on the driving pulley The maximum torque on the driven pulley1 %YY . 1:1. 1 docs.google.com Q بريدك الإلكتروني A vertical shaft is supported by a 5 نقاط thrust collar and bearing plate, as shown in Figure. Calculate the maximum axial stress of the shaft if the average punching shear stress in the collar and the average bearing stress between the collar and the plate are limited to 100 and 125 MPa, .respectively F100 mm- 150 mm Collar 25 mm إضافة ملف یالا - غرف الدردشة المجانية )aD( الصوتية المجانية: الدردشة الحية مع أصدقائك II