You must sum moments equal to 0 for equilibrium, so when drawing a free body diagram of AE and summing moments about the cut section at A, the applied loading is 10 kNm anticlockwise, so the moment in the beam at A in that diagram must be 10 kNm clockwise.fonseh said:
Do you mean that to produce sum of moment = 0 , the moment should counter The moment at AE= 5(2) - 10(2) = -10(anticlcockwise) , so , the moment is clockwise ?PhanthomJay said:
The moment is clockwise , so they it's neagtive -10 as stated by the author , right ? anything wrong with it ?PhanthomJay said:
I'm not sure what the author is stating. The internal moment at A acting on Section AE is clockwise. The picture is confusing I think. Clockwise moments acting on left hand sections are negative, by convention. But the author goes against convention when drawing the moment diagram, and shows the moment as positive. You can argue that being unconventional is ok, but it is wrong as far as I am concerned, because it does not follow the calculus of dM/dx = Vfonseh said:
Can you explain why the internal moment is clockwise of 10 ?PhanthomJay said:
Since internal moment = reaction moment , so at left of A , the moment resultant = 10Nm anticlockwise , reaction moment has to be 10NM clockwise, in order to satisfy the equilibrium requirement that the sum of all moments about any point must equal 0.fonseh said:
The sign convention for fixed end moment at cantilever beam follows the right-hand rule, where a clockwise moment is considered positive and a counterclockwise moment is considered negative.
The fixed end moment at cantilever beam is calculated by multiplying the applied load by the distance from the fixed end to the point where the moment is being calculated.
The sign convention for fixed end moment at cantilever beam is used to determine the direction and magnitude of bending moments and shear forces in the beam, which are crucial in structural analysis and design.
No, the sign convention for fixed end moment at cantilever beam is specifically used for cantilever beams, where one end is fixed and the other end is free to rotate.
The sign convention for fixed end moment at cantilever beam determines the direction of the bending moment, which in turn affects the direction and magnitude of the deflection of the beam. A positive moment will result in a concave upward deflection, while a negative moment will result in a concave downward deflection.
