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Pure bending occurs at sections A-A and C-C where the shear force is zero. The maximum bending stress occurs at the extreme fibers (top and bottom surfaces) farthest from the neutral axis and is given by σmax = My/I = (10kN)(0.5m)/(6x10^6 mm^3) = 83.3 MPa. Since this exceeds the yield stress of 80 MPa, failure will occur if the loads are increased. The maximum each load can be increased to before failure is Pmax = (80 MPa)(6x10^6 mm^3)/(0.5m) = 9.6 kN.
- Author
- jzhong_7
- Language
- EN