A shaft needs to withstand at least 107cycles and its
made of steel.
applied load =22,000 lb
shaft length = 70 in
what's the shaft diameter?
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A shaft needs to withstand at least 107cycles and its
made of steel.
applied load =22,000...
Consider the fatigue properties of tool steel as shown below. Assume the data and endurance limit...
Consider the fatigue properties of tool steel as shown below.
Assume the data and endurance limits represent the fatigue
properties when R = 0. Find the endurance limits when R = 0.3 and R
= -0.3.
APTER 7 Mechanical Properties: Part Two 120 100 80 100,000 cycle fatigue life at 90,000 psi applied stress Tool steel Endurance limit 60,000 psi 3 60 40 20 0 Aluminum alloy 104 105 106 107 Number of cycles Figure 7-17 The stress-number of cycles...
The shaft shown is made of AISI 1040 CD steel
The shaft shown is made of AISI 1040 CD steel. It is machine finished and is subjected to a repeated bending stress of 15ksi. The diameter at the shoulder is 1.3in and will be used at a temperature of 400F. Estimate: (a) The endurance limit at 95% reliability (b) Endurance strength at 105 cycles and show on S-N plot 10 (c) Plot the design region by Modified Goodman theory and determine if failure is by yield or fatigue (d) Find the factor of safety...
For our fatigue experiment, the minimum diameter of the specimen is 0.25 inch. Based on the...
For our fatigue experiment, the minimum diameter of the specimen is 0.25 inch. Based on the endurance limit, what is your estimation of the ultimate strength (Sw) of this material? 550 500 I 450 400 350 amplitude (MPa) 300 . 250 200 200 Stress a 150 100 50 102 107 103 104 105 106 Fatigue life (cycles) 210 MPa 420 MPa 490 MPa 540 MPa For our fatigue experiment, the minimum diameter of the specimen is 0.25 inch. If the...
A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected to reversed...
A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected to reversed tension-compression load cycling along its axis of +7400 N to -2250N. Determine the fatigue life using the data shown below. 500 400 1045 steel 300 2014-T6 aluminum alloy 200 100 Red brass 10 103 104 106 105 108 10° 1010 Cycles to failure, N Stress amplitude, S (MPa)
A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected to reversed...
4 a) 4 a) continued b) c) Based on the following figures, the material that exhibits...
4 a)
4 a) continued
b)
c)
Based on the following figures, the material that exhibits an endurance limit of 10 MPa is: 700 600 Ti-5A1-2.5Sn titanium alloy 4340 steel 500 400 Maximum stress, S (MPa) 1045 steel 300 Ductile cast iron 200 70Cu-30Zn brass 2014-T6 Al alloy 100 EQ21A-T6 Mg alloy 0 104 105 108 10 106 107 Cycles to failure, N 25 PS PET 3 20 15 PMMA 2 Stress amplitude (MPa) Stress amplitude (ksi) 10 PP Nylon...
6. For the bearing with the largest radial load and without knowing the shaft diameter, what...
6. For the bearing with the largest radial load and without
knowing the shaft diameter, what would be the catalog rating for a
radially loaded ball bearing to withstand 1000 x 10e6 cycles with
90% reliability. The bearing manufacturer rates its bearing for a
million cycles.
7. A 10 mm diameter steel shaft is subject to bending stresses
only. The material has Sut = 1100 MPa and Sy = 950 MPa and a
fine-ground surface finish.
1. Determine the factor...
Q-1. You are testing a circular beam of two metals, 1045 steel and 2014-T6 aluminum, in...
Q-1. You are testing a circular beam of two metals, 1045 steel and 2014-T6 aluminum, in a rotating-cantilever beam fatigue test. If you need to choose one of these metals so that you can essentially design a part made of that metal, and subject the part to a repetitive stress- amplitude without ever failing due to fatigue, which one would you choose. (See the attached figure) 700 600 Ti-5Al-2.5Sn titanium alloy 4340 steel 500 400 Maximum stress, S (MPa) 1045...
There are 2 questions here. The first picture is the diagram used for both questions. Questions...
There are 2 questions here. The first picture is the diagram
used for both questions.
Questions 2 and 3 pertain to either 2024-T4 aluminum alloy used for lightweight automobile components or a 1308 titanium alloy used in nuclear attack submarines. The S-N endurance data (50% survival) for the alloys is shown below. Their tensile strengths are 70,000 psi and 155,000 for aluminum and titanium respectively 120 T 3100 O 80 60 D 40 Aluminu g 20 103 104 105 106...
A simply supported shaft is shown in Figure. A constant-magnitude transverse load P is applied as...
A simply supported shaft is shown in Figure. A constant-magnitude transverse load P is applied as the shaft rotates subject to a time-varying torque that varies from Tmin to Tmax. For ihe data in the row(s) assigned from Table, find the diameter of shaft required to obtain a safety factor of 2 in fatigue loading if the shaft is steel of Sut = 108 kpsi and Sy = 62 kpsi. The dimensions are in inches, the force in pounds, and...
5 a) b) c) d) The size of an internal crack that can be tolerated in...
5 a)
b)
c)
d)
The size of an internal crack that can be tolerated in alloy steel 4340 tempered at 425C for a stress of 100 MPa is (use any needed data from Chapter 8): 487 mm 80.5 mm O 246 mm 40.25 mm 161 mm 287 mm 492 mm 368 mm 122 mm 413 mm The fatigue strength after 100 million cycles in 2014-T6 aluminum alloy is (see the figure shown below): 700 600 Ti-5Al-2.5Sn titanium alloy 4340...
Consider the fatigue properties of tool steel as shown below.
Assume the data and endurance limits represent the fatigue
properties when R = 0. Find the endurance limits when R = 0.3 and R
= -0.3.
APTER 7 Mechanical Properties: Part Two 120 100 80 100,000 cycle fatigue life at 90,000 psi applied stress Tool steel Endurance limit 60,000 psi 3 60 40 20 0 Aluminum alloy 104 105 106 107 Number of cycles Figure 7-17 The stress-number of cycles...
For our fatigue experiment, the minimum diameter of the specimen is 0.25 inch. Based on the endurance limit, what is your estimation of the ultimate strength (Sw) of this material? 550 500 I 450 400 350 amplitude (MPa) 300 . 250 200 200 Stress a 150 100 50 102 107 103 104 105 106 Fatigue life (cycles) 210 MPa 420 MPa 490 MPa 540 MPa For our fatigue experiment, the minimum diameter of the specimen is 0.25 inch. If the...
A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected to reversed tension-compression load cycling along its axis of +7400 N to -2250N. Determine the fatigue life using the data shown below. 500 400 1045 steel 300 2014-T6 aluminum alloy 200 100 Red brass 10 103 104 106 105 108 10° 1010 Cycles to failure, N Stress amplitude, S (MPa)
A 6.4 mm diameter cylindrical rod fabricated from a 2014-T6 aluminium alloy is subjected to reversed...
4 a)
4 a) continued
b)
c)
Based on the following figures, the material that exhibits an endurance limit of 10 MPa is: 700 600 Ti-5A1-2.5Sn titanium alloy 4340 steel 500 400 Maximum stress, S (MPa) 1045 steel 300 Ductile cast iron 200 70Cu-30Zn brass 2014-T6 Al alloy 100 EQ21A-T6 Mg alloy 0 104 105 108 10 106 107 Cycles to failure, N 25 PS PET 3 20 15 PMMA 2 Stress amplitude (MPa) Stress amplitude (ksi) 10 PP Nylon...
6. For the bearing with the largest radial load and without
knowing the shaft diameter, what would be the catalog rating for a
radially loaded ball bearing to withstand 1000 x 10e6 cycles with
90% reliability. The bearing manufacturer rates its bearing for a
million cycles.
7. A 10 mm diameter steel shaft is subject to bending stresses
only. The material has Sut = 1100 MPa and Sy = 950 MPa and a
fine-ground surface finish.
1. Determine the factor...
Q-1. You are testing a circular beam of two metals, 1045 steel and 2014-T6 aluminum, in a rotating-cantilever beam fatigue test. If you need to choose one of these metals so that you can essentially design a part made of that metal, and subject the part to a repetitive stress- amplitude without ever failing due to fatigue, which one would you choose. (See the attached figure) 700 600 Ti-5Al-2.5Sn titanium alloy 4340 steel 500 400 Maximum stress, S (MPa) 1045...
There are 2 questions here. The first picture is the diagram
used for both questions.
Questions 2 and 3 pertain to either 2024-T4 aluminum alloy used for lightweight automobile components or a 1308 titanium alloy used in nuclear attack submarines. The S-N endurance data (50% survival) for the alloys is shown below. Their tensile strengths are 70,000 psi and 155,000 for aluminum and titanium respectively 120 T 3100 O 80 60 D 40 Aluminu g 20 103 104 105 106...
A simply supported shaft is shown in Figure. A constant-magnitude transverse load P is applied as the shaft rotates subject to a time-varying torque that varies from Tmin to Tmax. For ihe data in the row(s) assigned from Table, find the diameter of shaft required to obtain a safety factor of 2 in fatigue loading if the shaft is steel of Sut = 108 kpsi and Sy = 62 kpsi. The dimensions are in inches, the force in pounds, and...
5 a)
b)
c)
d)
The size of an internal crack that can be tolerated in alloy steel 4340 tempered at 425C for a stress of 100 MPa is (use any needed data from Chapter 8): 487 mm 80.5 mm O 246 mm 40.25 mm 161 mm 287 mm 492 mm 368 mm 122 mm 413 mm The fatigue strength after 100 million cycles in 2014-T6 aluminum alloy is (see the figure shown below): 700 600 Ti-5Al-2.5Sn titanium alloy 4340...
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