# Shear Force and Bending Moment

Essay by   •  July 6, 2011  •  Essay  •  541 Words (3 Pages)  •  8,403 Views

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For both the concentrated load's experiment and non-symmetrical load's experiment, as the load increases, the bending moment and the shear force also increases. If there is the presence of a graph for the two experiment, we can observe that as the shear force increases(with decreasing x),the slope of the bending moment also increases. However, for the symmetrical load's experiment, as the load increases, the shear force does not show many changes in the value and almost all the readings are nearly zero yet the bending moment increases. The bending moment is maximum when its derivative, the shear force is zero. Zero shear force will lead to the zero principal stress at the neutral axis as the shear force are equal to the integration of the shear stress over the section.

There are some precautions need to be taken during this experiment. In order to prevent the disturbance from surrounding such as wind, this experiment must be done at a less windy place. This is because wind is able to affect the readings and make the results inaccurate. Make sure that the beam is aligned horizontally when each load is added to the hanger so that the beam is balanced and an accurate results can be obtained. Moreover, the load must place in the exact center of the beam in order for it to balance. We also must ensure that we do not cause the unbalancing of the beam when we align the beam horizontally or add load to the hanger.

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