A cylindrical bar of ductile cast iron is subjected to reversed
and rotating-bending tests, test results (i.e., S-N
behavior) are shown in Animated Figure 8.21. If the bar diameter is
8.52 mm, determine the maximum cyclic load that may be applied to
ensure that fatigue failure will not occur. Assume a factor of
safety of 2.21 and that the distance between loadbearing points is
55.3 mm.
answer in N 
References Cycles to failure 3.2E 3 Maximum stress 0 Mpa 2 700 Ti-5Al-2.5Sn titanium alloy 600 4340 steel 500 с 400 1045 steel E 300 Ductile cast irorn 2 200 70Cu-30Zn brass 2014-T6 Al alloy 100 EQ21A-T6 Mg alloy 104 105 10' Cvcles to failure. N 0 108 109
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A cylindrical bar of ductile cast iron is subjected to reversed and rotating-bending tests, test results (i.e., S-N behavior) are shown in Animated Figure 8.21. If the bar diameter is 8.52 mm, determi...
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...
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...
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...
DUC. TUJU, NUVCHULI 20, 2013 Problem 8.18 A cylindrical 4340 steel bar is subjected to reversed...
DUC. TUJU, NUVCHULI 20, 2013 Problem 8.18 A cylindrical 4340 steel bar is subjected to reversed rotating-bending stress cycling, which yielded the test results presented in Animated Figure 8.21. If the maximum applied load is 5,000 N, compute the minimum allowable bar diameter to ensure that fatigue failure will not occur. Assume a factor of safety of 2.25 and that the distance between loadbearing points is 55.0 mm. T-SAI-2.55n titanium alloy Maximum streSMP) 1045 steel Ductile cast iron 700 30...
A cylindrical bar of ductile cast iron is subjected to reversed and rotating-bending tests, test results (i.e., S-N behavior) are shown in Animated Figure 9.27. If the bar diameter is 10.3 mm, determi...
A cylindrical bar of ductile cast iron is subjected to reversed and rotating-bending tests, test results (i.e., S-N behavior) are shown in Animated Figure 9.27. If the bar diameter is 10.3 mm, determine the maximum cyclic load that may be applied to ensure that fatigue failure will not occur. Assume a factor of safety of 2.18 and that the distance between load-bearing points is 52.4 mm.
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...
Chapter 08, Problem 8.23 Suppose that the fatigue data shown in the Animated Figure: S-N Plot...
Chapter 08, Problem 8.23 Suppose that the fatigue data shown in the Animated Figure: S-N Plot for Brass is for a brass alloy that was tested using bending-rotating tests. A rod of this alloy is to be used for an automobile axle that rotates at an average rotational velocity of 700 revolutions per minute. Give the maximum bending stress amplitude possible for each of the following lifetimes of the rod: (a) 1 year, MPa [The tolerance is +/-1096] (b) 1...
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...
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...
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...
DUC. TUJU, NUVCHULI 20, 2013 Problem 8.18 A cylindrical 4340 steel bar is subjected to reversed rotating-bending stress cycling, which yielded the test results presented in Animated Figure 8.21. If the maximum applied load is 5,000 N, compute the minimum allowable bar diameter to ensure that fatigue failure will not occur. Assume a factor of safety of 2.25 and that the distance between loadbearing points is 55.0 mm. T-SAI-2.55n titanium alloy Maximum streSMP) 1045 steel Ductile cast iron 700 30...
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...
Chapter 08, Problem 8.23 Suppose that the fatigue data shown in the Animated Figure: S-N Plot for Brass is for a brass alloy that was tested using bending-rotating tests. A rod of this alloy is to be used for an automobile axle that rotates at an average rotational velocity of 700 revolutions per minute. Give the maximum bending stress amplitude possible for each of the following lifetimes of the rod: (a) 1 year, MPa [The tolerance is +/-1096] (b) 1...
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