Draw SFD and BMD of cantilever beam carrying load whose intensity vari...
SFD and BMD of Cantilever Beam with Uniformly Varying Load
Introduction:
A cantilever beam is a type of beam that is supported at one end and has a free end. When a load is applied to the free end, the beam will bend and deform. The shear force diagram (SFD) and bending moment diagram (BMD) are essential tools for analyzing the behavior of the beam under load.
Calculation:
For a cantilever beam with a uniformly varying load, the intensity of the load varies from zero at the free end to 'w' per unit length at the fixed end. The SFD and BMD can be calculated using the following steps:
1. Determine the reaction force at the fixed end of the beam. This can be found by taking the integral of the load intensity over the length of the beam.
2. Draw the SFD by starting at the free end of the beam and moving towards the fixed end. At the free end, the SFD will be zero since there is no load. As the load intensity increases towards the fixed end, the SFD will increase linearly. At the fixed end, the SFD will be equal to the reaction force.
3. Draw the BMD by starting at the fixed end of the beam and moving towards the free end. At the fixed end, the BMD will be zero since there is no bending moment. As the load intensity increases towards the free end, the BMD will increase quadratically. At the free end, the BMD will be equal to the maximum bending moment.
4. Verify the SFD and BMD by checking that the area under the SFD is equal to the change in elevation of the BMD.
Conclusion:
In conclusion, the SFD and BMD are important tools for analyzing the behavior of a cantilever beam under load. For a cantilever beam with a uniformly varying load, the SFD and BMD can be calculated by determining the reaction force, drawing the SFD and BMD, and verifying the results.
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