Bending motion and shear force

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SUMMARY

The discussion centers on calculating the reactions Ra and Rb for a cantilever beam measuring 2 meters in length with a 5 kN load applied at point A. The user attempts to derive the distance to point X, located halfway along the beam, using the equations Ra x 2 = 5 x X and Ra = 5X/12 = 0.416X kN. However, the accuracy of these equations is questioned, and the importance of creating a free body diagram and applying static equilibrium principles is emphasized for proper analysis of bending motion and shear force.

PREREQUISITES
  • Understanding of cantilever beam mechanics
  • Knowledge of static equilibrium principles
  • Familiarity with free body diagrams
  • Basic concepts of bending moment and shear force calculations
NEXT STEPS
  • Study the process of creating free body diagrams for cantilever beams
  • Learn how to apply static equilibrium equations to solve for reactions in beam structures
  • Research bending moment and shear force diagrams for cantilever beams
  • Explore the Engineering Toolbox resource on cantilever beams for practical examples
USEFUL FOR

Structural engineers, civil engineering students, and anyone involved in analyzing cantilever beam structures will benefit from this discussion.

lee123456789
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A cantilever beam 2 meter in length, 5KN act at point (A) of the beam. There is point x it looks like half way along the beam. how do i workout the distance of point X so work out the magnidues of Ra and Rb so i can go onto working out bending motion and shear force?ruff idea i had
1) Ra x 2 = 5 x X = 5X
2) Ra = 5X/12 = 0.416XkN
 
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I can’t understand the diagram only by the description.
Could you show some drawing, please?
 
Lnewqban said:
I can’t understand the diagram only by the description.
Could you show some drawing, please?
Screenshot 2020-10-28 180157.png
 
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There is no Ra in your case.
First, complete a free body diagram and the equations of static balance for the vertical forces and the moments.
 

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