the screw assuming compressive and shear strength of screw material to be 450 MPa and
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A load of 120 KN is to be lifted by a bottle type screw jack with lifting height of 500 mm. Design only the screw assuming compressive and shear strength of screw material to be 450 MPa and 220 MP's respectively. Assume screw is single start and having a pitch equal to 16% of the core diameter Also check the design for combined stresses
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- Write legibly, provide manual step by step solution, and diagram for below given problem. A 5 in diameter 4 splines shaft ( d= 0.85D, w= 0.24D, h= 0.075D ) and permanent fit has a compressive force of 3000 lb. Find the compressive stress if hub length is 2 1/2 in. Ans. 800 psiThe overhung crank of an engine having a cylinder diameter of 250 mm and stroke 400 mm. The connecting rod is 5 times the crank, the maximum explosion pressure in the cyl- inder is 1.7 MPa and engine runs at 200 r.p.m. Assuming a suitable stress for the material design the overhung crank. Also calculate the maximum stress in the crank arm when the crank is at 30° to the I.D.C position and the gas pressure is 0.8 MPa. Take modulųs of sec- tion for rectangular section as 0.269 bt².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
- 4. Determine the design stress for bolts in a cylinder cover where the load is fluctuating due to gas pressure. The maximum load on the bolt is 50 kN and the minimum is 30 kN. The load is unpredict- able and factor of safety is 3. The surface of the bolt is hot rolled and the suface finish factor is 0.9. During a simple tension test and rotating beam test on ductile materials (40 C 8 steel annealed), the following results were obtained : Diameter of specimen =12.5 mm; Yield strength= 240 MPa; Ultimate strength= 450 MPa; Endurance limit = 180 MPa. [Ans. 65.4 MPa]PROBLEM:1 A gas engine valve spring is to have a mean diameter of 55 mm. The maximum load it will have to sustain is 584 N with a corresponding deflection of 7.18 mm. The spring is to be made of tempered wire. Since the material is to be subjected to repeated loading and fatigue must be considered a low working stress of 650 N/mm? will be used. Find the size for wire and number of coils used. Take modulus of rigidity as 0.84 x 105 N/mm? .Assume the spring coil is squared and ground. Take shear stress Concentration factor as 1.15.1. load of F = 50000 N. A snap-ring groove is machined into the OD as shown and a hole is machined in the right end The round shaft shown below is subjected to an axial impact/shock direct tensile %3D (a) What diameter can the hole be ("ID" on the drawing) so that the stress at the snap ring groove and the stress at the hole are equal? (b) Would the shaft be suitable for impact loading if it is made from SAE 1040 WQT 900 alloy steel? A ID Ø35 F. F ID | 041 RO.2 (TYP) -041 A SECTION A-A
- The pin in the image shown below must transfer an axial tension force of 12.7 kN. Calculate the minimum pin diameter. Use Shear stress=0.4*Yield strength. Assume material is 1020 hot-rolled steel.The pin in the image shown must transfer an axial tension force of 12.7 kN. Calculate the minimum pin diameter. Use Shear Stress = 0.4*Yield strength. Assume material is 1020 hot-rolled steel.A drill drills a hole in a leg of a furniture. Uses a hand-operated drill with a bit of diameter equal to 5.79mm. If the resisting torque supplied by the table is equal to 0.36 N.m, what is the maximum shear stress of the drill bit? If the allowable shear stress in the drill bit is 44.215MPa, what is the maximum resisting toque before the drill binds up?
- The ultimate stress for the hitch ball is 60,000 ksi. (Capacity) The advertisement information is listed in the photos. 1) What is the maximum shear stress? (Demand) (Note you'll need to use half circle for Q) 2) What is the demand capacity stress ratio? V POWER TORQUE. PTWO011 HITCH BALL BOLA DE ENGANCHE 2" BALL DIAMETER 6000 LB. RATING 3-1/4" SHANK LENGTH PTWO011 POWER TORQUE. HITCH BALL BOLA DE ENGANCHE 1" SHANK DIAMETERthe propeller on a ship shown in figure qi is subjected to a compressive axial force f of 180 kn as it pushes the water backward and a torsional load t of 15 kn.m as it turns through the water. the solid shaft has a diameter of 150 mm. it is made of c1018 steel with yield strength of 220 mpa, young's modulus of 200 gpa and poisson's ratio of 0.3. a) at the most critical material point of the shaft, calculate the stress state and sketch the corresponding stress element. b) what is the factor of safety of the shaft if it is designed according to:i) tresca criterion?ii) von mises criterion? c) by sketching the principal stresses on the tresca and von mises yield loci, briefly explain the reason for the difference in the factor of safety according to both criteria. d) without performing any calculation, would the factor of safety become higher, lower or the same according to tresca criterion if a hollow shaft with an inner diameter of 130 mm and an outer diameter of 150 mm of the same…Q6 A screw clamp as shown in the figure, exerted load (30KN), and the type of thread is (Tr.70×8.5). Design stress for the nut is 60MPa and the length of the nut is 40mm. Requirements: 1) Determine the crushing stress and shearing stress for the screw. 2) Calculate the dimensions of the nut. 3) Sketch the full sections with all details for this screw clamp.