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Shear Force

Essay by   •  June 28, 2011  •  Essay  •  668 Words (3 Pages)  •  2,275 Views

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Shear force is the force in the beam acting perpendicular to its longitudinal (x) axis. The bending moment M is a moment where the bending effect of any load is measured by the product value of the perpendicular distance from any section of the beam. In this experiment, two types of load which are known as the concentrated load and the symmetrical load are being used.

Based on this experiment, the shear force and the bending moment for the concentrated

load are 1.722N and 0.534Nm respectively. The percentage error for both the shear force and the

bending moment for the concentrated load compared to their theoretical value are 5.12% and

5.15%. One of the reasons to get such percentage error is due to the surroundings, where the set-

ups are affected by the wind, making it less stable and therefore getting less accurate than the

actually results. Besides, random errors are too made during the experiment, such as not placing

the load properly in the middle.

Another type of load which is used is the symmetrical load. This load has a bending

moment of 0.51Nm and has a percentage error of 6.70%. Almost the same reasons as of the

concentrated load, the distance between the loads and the end of the span is not equal. Other

factors such as unstable positioning of the load do affect the reading. Therefore, the readings for

both theoretical and experimental value differ from each other.

While carrying out the experiment, several precaution steps should be to account. Firstly, avoid parallax error taking the readings using the shear force apparatus, including the measuring tape. Secondly, makesure that the all the readings taken using dynamometer should not have any zero error. Finally, avoid disturbance from the surroundings such as wind which is able to affect the readings.

Conclusion: The shear force and the bending moment for the concentrated load are 1.722N and 0.534Nm, which yields some percentage error of 5.12% and 5.15% comparing to the theoretical values. The bending moment for the symmetrical load id 0.51Nm and the percentage error is 6.70%

Shear force is the force in the beam acting perpendicular to its longitudinal (x) axis. The bending moment M is a moment where the bending effect of any load is measured by the product value of the perpendicular distance from any section of the beam. In this experiment, two types of load which are known as the concentrated load and the symmetrical load are being used.

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