Please answer all parts Review section 8.12 (Fatigue Life Prediction with Randomly Varying Loads), particularly problem 8.6.Consider a part made from aluminum: S, = 480 MPa, S= 410 MPa, SUTy5x10= 120 MPa (allfactors included). The material is subjected to a 10 s cycle where loads are applied as shown below:σ(MPa)340210160120-40-6010t(s)a) Find the oem'ea'm'and the number of cycles (n) for each specific overstress level (Remember thebasic definition of σ and σ in this scenario oσ = σ and σ = 0)memaeab) Construct the Modified Goodman diagram for this material and find the lines of constant life foreach load point, noting the stress level where σ for each line intersects the axis (correspondingto σ = 0).emeac) Find the number of cycles to failure for each of the lines of constant life (from part b). Hint: Youneed to use the log log Slog log N plot.d) Estimate the lifetime given the 10 s cycle.

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Answered: Review section 8.12 (Fatigue Life…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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An NDT examination of a steel component reveals the presence of a 5 mm long edge crack. If plane - strain conditions prevail (KIC = 75 MPa.m0.5), what would be the residual service lifetime of the steel part if it were subjected to repeated stresses of 400 MPa? The Paris law equation for the steel has parameters of A=4X10-37 and m = 4
The following creep data were taken on an aluminum alloy at 480 C (900 F) and a constant stress of 2.75 MPa (400 psi). Plot the data as strain versus time, a) then determine the steady-state or minimum creep rate. Note: The initial and instantaneous strain is not included. b) Identify at what time can a secondary creep region occur and at what time would it end to start the tertiary region in a creep curve: (see attachment).
The following creep data were taken on an aluminum alloy at 480 C (900 F) and a constant stress of 2.75 MPa (400 psi). Plot the data as strain versus time, a) then determine the steady-state or minimum creep rate. Note: The initial and instantaneous strain is not included. b) Identify at what time can a secondary creep region occur and at what time would it end to start the tertiary region in a creep curve: (see attachment).
The fluctuating stresses listed in the table are found at a critical location of a component made of steel with Se = 40 ksi, Sy = 80 ksi, Sut = 110 ksi and f= 0.87. These stresses are applied on the part within 10 s. What is the accumulative damage of this part? What is the life of the part in hours if this stress pattern continues to repeat for the remained of the part's life? Use Goodman criterion and Miner's rule in your solution. Loading order |Omin o max |Number of cycles -20 30 -10 50 1 3. -30 30 1
Please calculate each material individually Steel 4340 Maraging Steel A1 7075
120 MPa 100 MPa 110 MPa 130 MPa which is true?
d) Based on fatigue diagram below, find all value intersection at X and Y axis and give the name of all the line. (Fill all related calculation below) --- [2 marks] Fatigue diagram H B D Value for 'A' in fatigue diagram above? (MPa) - (1DP} Your answer Value for 'B' in fatigue diagram above? (MPa) - (1DP} Your answer Value for 'C' in fatigue diagram above? (MPa) - (1DP} Your answer
Consider an S-590 alloy component as shown in following figure that is subjected to a stress of 200 MPa (29,000 psi). At what temperature will the rupture lifetime be 500h?
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
1. Determine working stresses for the two alloys that have the stress–strain behaviors shown in Figures 6.22.
answer this question and show me the working outs

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