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A 1045 hot rolled steel rod undergoes axial cyclic loading from a minimum stress of 2...
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)
1) Determine unmodified fatigue strength (units = MPa) of hot-rolled 1020 steel shaft in axial loading...
1) Determine unmodified fatigue strength (units = MPa) of hot-rolled 1020 steel shaft in axial loading for a design life of 100,000 cycles. Do not apply any fatigue correction factors. SN _______________ 2) Determine unmodified fatigue strength (units = ksi) for a normalized 4140 steel shaft in bending for a design life of 107 cycles. Do not apply any fatigue correction factors. SN _______________ 3) Determine unmodified fatigue strength (units = MPa) for heat-treated 6061 aluminum rod in torsion for...
Problem 1 The machined steel bar shown in the figure undergoes fully reversed axial loading at...
Problem 1 The machined steel bar shown in the figure undergoes fully reversed axial loading at a nominal alternating stress of 30 ksi. 1. Find the safety factor for an infinite life of the bar if the critical section of this filleted bar in tension is assumed at the shoulder fillet. 2. How many cycles of stress can be expected? Given: The corrected endurance limit Se = 35 ksi. Material Ultimate Tensile Strength Sut = 100 ksi. Material Yield Strength...
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...
PLEASE MAKE SURE THE ANSWERS MATCH THE ONES GIVEN BETWEEN PARENTHESES 1. Fluctuating loading. The cold-drawn...
PLEASE MAKE SURE THE ANSWERS MATCH THE ONES GIVEN BETWEEN
PARENTHESES
1. Fluctuating loading. The cold-drawn AISI 1040 steel bar (S590 MPa, S 490 MPa) shown in the figure is subjected to the following different cyclic loading conditions. Estimate the fatigue factor of safety based on achieving infinite life (use Modified Goodman method) and the yielding factor of safety. If infinite life is not predicted, estimate the number of cycles to failure. The fatigue strength modification factor f 0.87. For...
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)
Problem 1 The machined steel bar shown in the figure undergoes fully reversed axial loading at a nominal alternating stress of 30 ksi. 1. Find the safety factor for an infinite life of the bar if the critical section of this filleted bar in tension is assumed at the shoulder fillet. 2. How many cycles of stress can be expected? Given: The corrected endurance limit Se = 35 ksi. Material Ultimate Tensile Strength Sut = 100 ksi. Material Yield Strength...
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...
PLEASE MAKE SURE THE ANSWERS MATCH THE ONES GIVEN BETWEEN
PARENTHESES
1. Fluctuating loading. The cold-drawn AISI 1040 steel bar (S590 MPa, S 490 MPa) shown in the figure is subjected to the following different cyclic loading conditions. Estimate the fatigue factor of safety based on achieving infinite life (use Modified Goodman method) and the yielding factor of safety. If infinite life is not predicted, estimate the number of cycles to failure. The fatigue strength modification factor f 0.87. For...
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