Draw bending moment diagram, Mechanical Engineering

Draw bending moment diagram:

Draw the shear force diagram (SFD) & bending moment diagram (BMD) for the beam illustrated in Figure .

Solution

Reaction at the support A, RA = + 4 + (1.5 × 6) = + 13 kN.

Shear Force

SF at A, FA = + 13 kN (considering right side)

SF at C, FC = + 13 - 1.5 × 6

                      = + 4 kN

SF just left of D = + 13 - 1.5 × 6

                          = + 4 kN

SF just right of D = + 4 - 4 = 0

29_Draw bending moment diagram.png

Figure

Bending Moment

BM at B, MB = 0  (As, the moment at the free end is equal to zero)

BM at D, MD = 0 (letting right side of D, there is no loading on BD)

BM at C, MC = - 4 × 2 = - 8 kN m (- ve sign because of right anticlockwise)

BM at A, MA = - 4 × 8 - 1.5 × 6 ×(6/2) = - 59 kN m.

Posted Date: 1/22/2013 12:32:43 AM | Location : United States







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