Read and Solve carefully please Write clearly and Box the Final answer Express your answer to 3 Significant figures and include appropriate units. Suppose a steel part is subject to two stress states: state 1 has a completely-reversing stress amplitude of 37 ksi and state 2 has a completely-reversing stress amplitude of 43 ksi. Further, suppose that in the high-cycle finite life region of the S-N diagram, the relationship between stress andlife is given by S = 95.1 N-0.0851 where S is in ksi and N is in cycles.According to our methods, if this part is subjected to 36,259 cycles at state 1, how many cycles of remaining life can we expect at state 2? Give youranswer in cycles, but do not include a unit--just type a number.

Given: A part subjected completely reverse load S1=37 ksi S2=43 ksi S=95.1N-0.0851 To determine: If…

Answered: According to our methods, if this part…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Suppose a steel part is subject to to stress states: State one has a completely reversing stress amplitude of 32 ksi and state two have a completely reversing stress amplitude of 41 ksi. Further, suppose that in high cycle finite life region of the S-N diagram the relationship between stress and life is given by S = 95.1N^-0.0851 where S is in ksi and N is in Cycles. According to our methods, if this part is subjected to 29506 cycles at state one how many cycles of remaining life can we expect at state two? Answer must be in cycles
In the Haigh diagram depicted in figure, point A represents the fatigue stress in a standard screw. Suppose the same screw is cold I rolled and then subjected to thes same fatigue l We A moves: expect point C A B O in D O in B O in C 246595 03mchd 3246598 03mehade dreamstime 10 010704650s 03mchu 24 5036 5.03men 2-699643mchado21 O 070 6246585 03cnoco 246595 03oh
An S-N plot from fatigue testing of a steel is provided below. Use the plot to determine the following values for this steel. 1. Fatigue limit: 2. Fatigue lifetime at a stress amplitude of: 415 MPa: 275 MPa: 3. Fatigue strength at: 5x104 cycles: 5x105 cycles 500 400 300 200 100 0 1.E+04 Stress Amplitude (MPa) 1.E+05 1.E+06 Cycles to Failure 1.E+07 1.E+08
A material presents S-N fatigue behaviour shown on the right with the fatigue limit being 100 MPa. If a cylindrical bar made from the material has a diameter of 20 mm is subjected to repeated tensile stress along its axis, calculate the maximum allowable tensile load to ensure no occurrence of fatigue failure. Stress amplitude, S Fatigue limit 103 104 105 106 107 Cycles to failure, N (logarithmic scale) 108 10⁹ 1010
(d) Figure Q2 (d) shows a typical aluminum stress-strain curve. A mechanical engineer has to carry out a tensile test for a rod of aluminum that can withstand an applied force of 20kN. To ensure safety, the maximum allowable stress on the rod is limited to 400 MPa, which is below the yield strength of the aluminum. The rod must be at least 380 cm long and must deform elastically not more than 0.8 cm when the force is applied. Design the appropriate rod.
Q5/ The Stress-strain diagram of any ductile metal or alloys reveals several critical points. Based on your understanding of this diagram, plot it schematically (without scale) and specify the following points: 1. Tensile streng th 2. Yield strength 3. At what stage the necking occurs 4. The fracture strength 5. The elastic zone 6. The Plastic zone 7. Young modulus of elasticity
1. A ductile hot-rolled steel bar has a yield strength in tension and compression of 350 MPa. Using the distortion-energy and maximum-shear-stress theories, determine the factors of safety for the following plane stress state: 75 MPa 50 MPa 50 MPa 2. Consider a bar of AISI 1015 cold-drawn steel. Using the distortion-energy and maximum-shear-stress theories to determine the factors of safety for a stress state with the following plane principal stresses: 0A = 30 kpsi, OB = 15 kpsi.
The S-N curve which represents the fatigue strength, which is measured as a stress amplitude, as a function of number of stress cycles, can be approximated by a straight line in therange of 103cycles to 106cycles when plotted as log(S) versus log(N). Beyond 106cycles,the fatigue strength remains constant. The fatigue strength of a certain alloy at 103cyclesis given as 80 % of the ultimate tensile strength and its endurance limit is 50 % of theultimate tensile strength.(a) The alloy part fails in 15 000 cycles. Calculate the percent change (increase or decrease)of the maximum applied cyclic stress amplitude if the life of the part needs to beextended by 3.5 times. Is this considered under a high or low cycle fatigue failure?State any assumptions made. (12 marks)(b) If the applied cyclic stress amplitude remains unchanged when the life is extended by3.5 times, calculate the percent change (increase or decrease) of the ultimate tensilestrength of a new alloy required. (8 marks)(c) If the…
The fatigue (endurance) limit of a 1045 (plain carbon) stcel is about 300 MN/m² when the mean stress is zero. The tensile strength of this steel is 750 MPa. Using the Goodman equation, estiniate the safe stress amplitude for 1045 steel for the situation of a mean stress of 250 MPa.
3. A steel tape is calibrated at 20°C. On a cold day when the temperature is -15°C,what will be the percent error in the tape?
The answer to this question in the selected end chapter answers is the following: w_1= 35.2 rad/s w_2 = 42.3 rad/s, w_3= 85.0 rad/s Please show me the solution. Thank you.
Project 3: Table 4 shows the fatigue data of a ductile cast iron to be used for an automobile axle that rotates at an average rotational speed of 750 revolutions per minute: Tuble 4: Fuligue dula of u duclile cust iron Stress Amplitude (МPa) Cycles to Failure 248 1 X 105 236 ЗX 105 224 1X 106 ЗX 106 1 X 107 3 X 107 1 X 108 3 X 108 213 201 193 193 193 a) Make an S-N plot (stress amplitude versus logarithm cycles to failure). b) What is the fatigue limit for this alloy? c) Determine the fatigue lifetimes at stress amplitudes of 230 MPa and 175 MPa? d) Discuss your results.

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According to our methods, if this part is subjected to 36,259 cycles at state 1, how many cycles of remaining life can we expect at state 27