Answer (2):. Given data:. Stress at point (A). Find, sh

Added on - 21 Sep 2019

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Answer (2):Given data:d=0.2mL=1mT=20πStress at point (A)Fx=0Vx20π=0Fy=0Vy=20πMy=0σyb=NA=200.1π=200π=63.66σy=MyII=πR44=π(0.1)44=0.25πx104m4y=4R3πσyb=20πx1x4x0.13πx0.25πx104¿3.395305x104σy=63.66+33953.05σy=34016.71Find, shear stressτBy=VyQItQ=A1y1¿π(0.1)2(4R3π)¿π(0.1)2(4x0.13π)
Q=13.33x104I=πR44=π(0.1)44=0.25πx104m4τA=20πx13.33x1040.25πx104x0.2τA=5332kN/m2Answer (B)Yielding not occur at point “A”.τmax=±(σx+σy2)2+τxy2¿(80000+02)2+53322¿40353.81kNm2¿40.353MpaAs per given condition if maximum shear stress greater then yield stress then yield occur, but valueof maximum shear stress is lower than yield stress therefore yielding not occur at point “B”Principal stress at point A,σ1,2=(σx+σy2)±(σx+σy2)2+(τxy)2¿34016.71+02±(34016.71+02)2+(5332)2¿17008.355±34432.060σA=51440.4153kNm2(Tensile)σA=17423.705kNm2(Compressive)Answer (c)Yielding not occur at point “A”.τmax=±(σx+σy2)2+τxy2
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