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A) using reliability of 90% assuming full notch
sensitivity determine the fatigue factor of safety at...
The rotating shaft in the glven figure is machined from AISI 1020 CD steel. It is...
The rotating shaft in the glven figure is machined from AISI 1020 CD steel. It is subjected to a force of F=7 kN. Find the minimum factor of safety for fatigue based on Infinite life. Be sure to check for yielding. 500 175 23 D. 35 D. -3R. 50 D -23 D. 20 -180 What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress concentration-factor? The value of the theoretical stress-concentration factor is The...
The rotating shaft in the glven figure is machined from AISI 1020 CD steel. It is subjected to a force of F= 7 kN.
The rotating shaft in the glven figure is machined from AISI 1020 CD steel. It is subjected to a force of F= 7 kN. Find the minimum factor of safety for fatigue based on Infinite life. Be sure to check for yielding. What are the values of the theoretical stress-concentration factor, the notch sensitivity. and the fatigue stress concentration-factor? The value of the theoretical stress-concentration factor is _______ The value of the notch sensitivity is _______ The value of the fatigue stress-concentration factor is...
Problems 1. (Subtotal: 21 points) A steady torque of 1500 Ibf in is transmitted by a...
Problems 1. (Subtotal: 21 points) A steady torque of 1500 Ibf in is transmitted by a machined shaft made of steel with an ultimate tensile strength of 100 kpsi. The transverse cross section at the location of a shoulder against which a gear sits is subjected to a bending moment which is a sinusoidal function of time with a maximum of 800 lbf-in. Furthermore, this cross section is the location for the maximum von Mises stress. The smaller diameter at...
Question 1: A rotating shaft with a diameter of 30 mm is made of 1018 cold-rolled...
Question 1: A rotating shaft with a diameter of 30 mm is made of 1018 cold-rolled steel. The stress concentration factor is 2.366, and the shear stress concentration factor is 1.75 respectively. The notch sensitivity is 0.78 and for shear it's 0.96 Estimate the factor of safety guarding against fatigue failure using modified-Goodman and Soder- berg for each of the following loading conditions: a) The shaft is subjected to a completely reversed torque of 120 N.m in phase with a...
Problem 2: A hot-rolled shaft shoulder has a large diameter D is 45 mm, the small...
Problem 2: A hot-rolled shaft shoulder has a large diameter D is 45 mm, the small diameter d is 30 mm, and the fille (notch) radius is 3 mm. The bending moment, and the steady torsion moments are 100 N.m, and 75 N. respectively. The reliability goal for the endurance limit is 0.90. If the shaft is made of AISI 1030 hot-roll steel, (a) Determine the fatigue stress concentration factors (Ks, and Ks). (b) Determine endurance limit (Se). (c) Determine...
Sut = 80 ksi, Sy= 60 ksi, Si = 40 ksi, q=0.85 (notch sensitivity), steel E...
Sut = 80 ksi, Sy= 60 ksi, Si = 40 ksi, q=0.85 (notch sensitivity), steel E = 30e6 psi Remember we use Modified-Goodman for all calculations A3 inch hollow tube with 1/16 inch wall thickness is used to make a 4 foot long drive shaft. The maximum torque on the is 400 ft-lbf. The shaft is loaded cyclically from 0 to max torque. a) Calculate the fatigue and yield factor of safety b) Assume that there is a 0.3 in...
The rotating shaft shown below is supported by self aligning bearings at A and D. The diameter of...
The rotating shaft shown below is supported by self aligning bearings at A and D. The diameter of the shaft changes from D-1.5" to d-1.0" at the midpoint of the shaft. The radius of the fillet at the diameter change is r-0.2" and all surfaces are machined. The shaft is made of normalized 1020 steel having . 64.0 ksi and S, = 50.3 ksi . The shaft is loaded with 250-lb forces at B and C as shown to create...
The cold drawn AISI 1040 steel bar with 25-mm width and 10-mm thick has a 6-...
The cold drawn AISI 1040 steel bar with 25-mm width and 10-mm thick has a 6- mm diameter thru hole in the center of the plate. The plate is subjected to a completely reversed axial load that fluctuates from 12kN to 28kN. Use notch sensitivity of 0.83. (40 points) a. Estimate the fatigue factor of safety based on yielding criteria. b. Estimate the fatigue factor of safety based on Goodman and Morrow criteria.
PROBLEM 4: Calculate the diameter D of the rotating shaft, supported on each end by a...
PROBLEM 4: Calculate the diameter D of the rotating shaft, supported on each end by a radial bearing, to obtain infinite life with a safety factor of 1.2. The shaft is machined from AISI 1040 HR steel, and is subject to a bending moment caused by a static force F-4 KN. The radius r is 0.05D. The length of the shaft L 0.5 m. The shaft rotates at in 1 ㄧㄒㄨ D. In 1000 RPM. Assume full notch sensitivity q...
The shaft shown in figure is subjected to a reversed bending torque .The moment is distributed along the shaft as if...
The shaft shown in figure is subjected to a reversed bending torque .The moment is distributed along the shaft as iflustra values 2000N.m and 3000 transmitted torque T-4000 N.m .The shaft is made of hardened steel having (Sy-900 MP, Su-1200 MP. ),and all important surfaces are finished by grinding For reliability of 99% and a safety factor of 2.5. (a) Determine the diameter d against static failure (b) Determine the diameter d against fatigue failure using Goodman approach if D-1.1d...
The rotating shaft in the glven figure is machined from AISI 1020 CD steel. It is subjected to a force of F=7 kN. Find the minimum factor of safety for fatigue based on Infinite life. Be sure to check for yielding. 500 175 23 D. 35 D. -3R. 50 D -23 D. 20 -180 What are the values of the theoretical stress-concentration factor, the notch sensitivity, and the fatigue stress concentration-factor? The value of the theoretical stress-concentration factor is The...
Problems 1. (Subtotal: 21 points) A steady torque of 1500 Ibf in is transmitted by a machined shaft made of steel with an ultimate tensile strength of 100 kpsi. The transverse cross section at the location of a shoulder against which a gear sits is subjected to a bending moment which is a sinusoidal function of time with a maximum of 800 lbf-in. Furthermore, this cross section is the location for the maximum von Mises stress. The smaller diameter at...
Question 1: A rotating shaft with a diameter of 30 mm is made of 1018 cold-rolled steel. The stress concentration factor is 2.366, and the shear stress concentration factor is 1.75 respectively. The notch sensitivity is 0.78 and for shear it's 0.96 Estimate the factor of safety guarding against fatigue failure using modified-Goodman and Soder- berg for each of the following loading conditions: a) The shaft is subjected to a completely reversed torque of 120 N.m in phase with a...
Problem 2: A hot-rolled shaft shoulder has a large diameter D is 45 mm, the small diameter d is 30 mm, and the fille (notch) radius is 3 mm. The bending moment, and the steady torsion moments are 100 N.m, and 75 N. respectively. The reliability goal for the endurance limit is 0.90. If the shaft is made of AISI 1030 hot-roll steel, (a) Determine the fatigue stress concentration factors (Ks, and Ks). (b) Determine endurance limit (Se). (c) Determine...
Sut = 80 ksi, Sy= 60 ksi, Si = 40 ksi, q=0.85 (notch sensitivity), steel E = 30e6 psi Remember we use Modified-Goodman for all calculations A3 inch hollow tube with 1/16 inch wall thickness is used to make a 4 foot long drive shaft. The maximum torque on the is 400 ft-lbf. The shaft is loaded cyclically from 0 to max torque. a) Calculate the fatigue and yield factor of safety b) Assume that there is a 0.3 in...
The rotating shaft shown below is supported by self aligning bearings at A and D. The diameter of the shaft changes from D-1.5" to d-1.0" at the midpoint of the shaft. The radius of the fillet at the diameter change is r-0.2" and all surfaces are machined. The shaft is made of normalized 1020 steel having . 64.0 ksi and S, = 50.3 ksi . The shaft is loaded with 250-lb forces at B and C as shown to create...
The cold drawn AISI 1040 steel bar with 25-mm width and 10-mm thick has a 6- mm diameter thru hole in the center of the plate. The plate is subjected to a completely reversed axial load that fluctuates from 12kN to 28kN. Use notch sensitivity of 0.83. (40 points) a. Estimate the fatigue factor of safety based on yielding criteria. b. Estimate the fatigue factor of safety based on Goodman and Morrow criteria.
PROBLEM 4: Calculate the diameter D of the rotating shaft, supported on each end by a radial bearing, to obtain infinite life with a safety factor of 1.2. The shaft is machined from AISI 1040 HR steel, and is subject to a bending moment caused by a static force F-4 KN. The radius r is 0.05D. The length of the shaft L 0.5 m. The shaft rotates at in 1 ㄧㄒㄨ D. In 1000 RPM. Assume full notch sensitivity q...
The shaft shown in figure is subjected to a reversed bending torque .The moment is distributed along the shaft as iflustra values 2000N.m and 3000 transmitted torque T-4000 N.m .The shaft is made of hardened steel having (Sy-900 MP, Su-1200 MP. ),and all important surfaces are finished by grinding For reliability of 99% and a safety factor of 2.5. (a) Determine the diameter d against static failure (b) Determine the diameter d against fatigue failure using Goodman approach if D-1.1d...
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