Q3 Figure 3 Figure 3 shows a steel plate subject to a varying load, P that cycles between 0 and 19.2 kN. The plate has w

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Q3 Figure 3 Figure 3 Shows A Steel Plate Subject To A Varying Load P That Cycles Between 0 And 19 2 Kn The Plate Has W 1 (97.5 KiB) Viewed 52 times

Q3 Figure 3 Figure 3 shows a steel plate subject to a varying load, P that cycles between 0 and 19.2 kN. The plate has width, W = 40 mm and thickness, t = 6 mm. It has a centrally located hole, diameter 8mm. Assume the stress concentration factor, Kt, for the hole is 2.5. The steel has UTS of 680 MPa and yield strength of 525 MPa. Its fatigue life (for zero mean stress) is given by the expression: De = 1080 NOC. The endurance stress. Os has units of MPa. (a) Calculate the applied cyclic stress range, stress amplitude and mean stress in MPa). Calculate the maximum static stress and show on a sketch of the component where the maximum stress would occur. (b) Calculate the notch sensitivity factor, q and fatigue notch factor, Kf (assume a = 0.25 mm) and explain how Kf is used. Apply it to the loaded component. (c) Briefly state the effect of non-zero mean stress on fatigue life. Calculate the number of cycles to failure, Ne, using the Goodman method. (d) Briefly describe how you would create a static 2-D FEA model of this part loaded in tension. Include element type, boundary conditions, meshing strategy and any limitations.