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Problem 1 The machined steel bar shown in the figure undergoes fully reversed axial loading at...
3. A steel bar undergoes cyclic loading such that Omax = 413MPa and Omin = -138MPa,...
3. A steel bar undergoes cyclic loading such that Omax = 413MPa and Omin = -138MPa, for the material, Sut = 551MPa and Sy = 448MPa and a fully corrected endurance limit of Se=275.5MPa and fatigue strength ratio f=0.9. Estimate the number of cycles to a fatigue failure using Modified Goodman criterion. (30 pts)
answer E,F,G and H please 2. A bar of steel undergoes cyclic loading such that max...
answer E,F,G and H please
2. A bar of steel undergoes cyclic loading such that max = 60 kpsi and Omin = -20 kpsi. For the material, Sut = 80 kpsi, 5y = 65 kpsi,ka = 1.107. ky = 0.858, ke = ka = k, = k, = 1, and f = 0.9. (a) Calculate the alternating stress. (2 points) (b) Calculate the meani median) stress. (2 points) (c) Calculate the fully corrected endurance limit. (6 points) (d) Calculate the...
(15 marks) Question Four The fully machined steel connecting link is made from a steel with...
(15 marks) Question Four The fully machined steel connecting link is made from a steel with an ultimate tensile strength of 700MPa. The holes at either end of the link are to carry pin connectors. The link is 10mm thick The link is axially loaded, with a fully reversed load. Assuming infinite life and a safety factor of 2, estimate the maximum load that may be applied to the link. Note that as axially loaded members will only need to...
A 1045 hot rolled steel rod undergoes axial cyclic loading from a minimum stress of 2...
A 1045 hot rolled steel rod undergoes axial cyclic loading from a minimum stress of 2 kpsi to a maximum of 10 kpsi. The rod has a hole in the center of bar, with a Kt 1.7, and notch sensitivity factor 0.9. The yield strength of bar is 45 kpsi, ultimate strength 82 kpsi, fully endurance limit of 20 kpsi, fatigue strength fraction 0.85. 1. a. Using modified goodman criteria, find FOS b. lfinfinite life is not predicted estimate the...
: A 1 in-diameter solid round bar has a groove with a 0.1-in radius machined into...
: A 1 in-diameter solid round bar has a groove with a 0.1-in radius machined into it. The bar is made of steel with an ultimate strength of 120 ksi and it is subjected to an axial force that fluctuates between-5.15 kip and 12.85 kip. The static stress concentration factor at the groove is Kt 2.1. (40 points) a) Classify the problem type based on the loading condition. b) Determine the fatigue factor of safety using the Goodman failure criterion....
Problem#2: (20 pts) A cantilever beam undergoes following fatigue load conditions: a fully reversed first cycle...
Problem#2: (20 pts) A cantilever beam undergoes following fatigue load conditions: a fully reversed first cycle with maximum and minimum bending stress at 47 and 47 kpsi respectively for 5000 cycles; a fully reversed second cycle with maximum and minimum bending stress at 40 and -40 kpsi respectively for 65000 cycles; a fully reversed third cycle with maximum and minimum bending stress at 33 and -33 kpsi. How many cycles of operation can be expected at this stress level? For...
The solid cireular cross-section bar shown is machined from AISI 1040 CD steel and is subjected t...
show all work and steps
The solid cireular cross-section bar shown is machined from AISI 1040 CD steel and is subjected to a t60 kip fuctuating axial load as shown. 18 in 8 in 8 in 0.20 in rad." L- 2-in dia. 3-in dia. +60 kip НН -60 kip 1. Estimate the fully corrected endurance limit. Express your answer in ksi. 2. Determine the minimum factor of safety based on achieving infinite life 3. Determine the factor of safety against...
Question Four (15 marks) The fully machined steel connecting link is made from a steel with...
Question Four (15 marks) The fully machined steel connecting link is made from a steel with an ultimate tensile strength of 700MPa. The holes at either end of the link are to carry pin connectors. The link is 10mm thick. The link is axially loaded, with a fully reversed load. Assuming infinite life and a safety factor of 2, estimate the maximum load that may be applied to the link. Note that as axially loaded members are generally not sensitive...
2. Tensile and fully reversed loading fatigue tests were conducted for a certain steel alloy and...
2. Tensile and fully reversed loading fatigue tests were conducted for a certain steel alloy and revealed the tensile strength and endurance limit to be 1200 and 550 MPa, respectively. If a rod of this material supply were subjected to a static stress of 600 MPa and oscillating stresses whose total range was 700 MPa, would you expect the rod to fail by fatigue processes? Use the Gerber relation for the analysis.
A ground steel shaft with a shoulder fillet has dimensions: D= 30 mm, d=25 mm and...
A ground steel shaft with a shoulder fillet has dimensions: D= 30 mm, d=25 mm and r= 2 mm. It is subjected to a combined nominal loading of 40 to 190 MPa bending stress and torsional stress of 20 to 70 MPa, which are in phase. Find the safety factor for infinite life if ultimate tensile strength is 965 MPa, state all assumptions.
3. A steel bar undergoes cyclic loading such that Omax = 413MPa and Omin = -138MPa, for the material, Sut = 551MPa and Sy = 448MPa and a fully corrected endurance limit of Se=275.5MPa and fatigue strength ratio f=0.9. Estimate the number of cycles to a fatigue failure using Modified Goodman criterion. (30 pts)
answer E,F,G and H please
2. A bar of steel undergoes cyclic loading such that max = 60 kpsi and Omin = -20 kpsi. For the material, Sut = 80 kpsi, 5y = 65 kpsi,ka = 1.107. ky = 0.858, ke = ka = k, = k, = 1, and f = 0.9. (a) Calculate the alternating stress. (2 points) (b) Calculate the meani median) stress. (2 points) (c) Calculate the fully corrected endurance limit. (6 points) (d) Calculate the...
(15 marks) Question Four The fully machined steel connecting link is made from a steel with an ultimate tensile strength of 700MPa. The holes at either end of the link are to carry pin connectors. The link is 10mm thick The link is axially loaded, with a fully reversed load. Assuming infinite life and a safety factor of 2, estimate the maximum load that may be applied to the link. Note that as axially loaded members will only need to...
A 1045 hot rolled steel rod undergoes axial cyclic loading from a minimum stress of 2 kpsi to a maximum of 10 kpsi. The rod has a hole in the center of bar, with a Kt 1.7, and notch sensitivity factor 0.9. The yield strength of bar is 45 kpsi, ultimate strength 82 kpsi, fully endurance limit of 20 kpsi, fatigue strength fraction 0.85. 1. a. Using modified goodman criteria, find FOS b. lfinfinite life is not predicted estimate the...
: A 1 in-diameter solid round bar has a groove with a 0.1-in radius machined into it. The bar is made of steel with an ultimate strength of 120 ksi and it is subjected to an axial force that fluctuates between-5.15 kip and 12.85 kip. The static stress concentration factor at the groove is Kt 2.1. (40 points) a) Classify the problem type based on the loading condition. b) Determine the fatigue factor of safety using the Goodman failure criterion....
Problem#2: (20 pts) A cantilever beam undergoes following fatigue load conditions: a fully reversed first cycle with maximum and minimum bending stress at 47 and 47 kpsi respectively for 5000 cycles; a fully reversed second cycle with maximum and minimum bending stress at 40 and -40 kpsi respectively for 65000 cycles; a fully reversed third cycle with maximum and minimum bending stress at 33 and -33 kpsi. How many cycles of operation can be expected at this stress level? For...
show all work and steps
The solid cireular cross-section bar shown is machined from AISI 1040 CD steel and is subjected to a t60 kip fuctuating axial load as shown. 18 in 8 in 8 in 0.20 in rad." L- 2-in dia. 3-in dia. +60 kip НН -60 kip 1. Estimate the fully corrected endurance limit. Express your answer in ksi. 2. Determine the minimum factor of safety based on achieving infinite life 3. Determine the factor of safety against...
Question Four (15 marks) The fully machined steel connecting link is made from a steel with an ultimate tensile strength of 700MPa. The holes at either end of the link are to carry pin connectors. The link is 10mm thick. The link is axially loaded, with a fully reversed load. Assuming infinite life and a safety factor of 2, estimate the maximum load that may be applied to the link. Note that as axially loaded members are generally not sensitive...
2. Tensile and fully reversed loading fatigue tests were conducted for a certain steel alloy and revealed the tensile strength and endurance limit to be 1200 and 550 MPa, respectively. If a rod of this material supply were subjected to a static stress of 600 MPa and oscillating stresses whose total range was 700 MPa, would you expect the rod to fail by fatigue processes? Use the Gerber relation for the analysis.
A ground steel shaft with a shoulder fillet has dimensions: D= 30 mm, d=25 mm and r= 2 mm. It is subjected to a combined nominal loading of 40 to 190 MPa bending stress and torsional stress of 20 to 70 MPa, which are in phase. Find the safety factor for infinite life if ultimate tensile strength is 965 MPa, state all assumptions.
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