# Which shape of the beam is the best against bending?

## Which shape of the beam is the best against bending?

The most efficient shape for both directions in 2D is a box (a square shell); the most efficient shape for bending in any direction, however, is a cylindrical shell or tube. For unidirectional bending, the I or wide flange beam is superior.

## Which is more stronger in bending equal area square or circular beam?

So for the same cross-section area, a square section is better than the circular section in bending.

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Which beam is strongest?

There is no such thing as a “stronger beam” in engineering design. Whether the beam is steel, reinforced concrete, timber, or any other material, it can be sized to withstand whatever load is applied to it (up to a practical limit).

### Which is the most economical section for beam?

tubular section
So tubular section is the most economical section.

### Why do we prefer rectangular cross section to circular cross section for beams?

Abdulmuttalib Said, you preferred the rectangular section while Mr. Diar Askari said “Circular cross-sections have higher resistance to bending moment and deflection than rectangular cross-sections”.

Which of the following section is the most efficient in carrying bending moment?

One is greater than 2 , meaning square section is stiffer than circular section when it comes to bending resistance. Forces act perpendicular to the center of gravity. Hence your most eficient section has the most force in the farthest section regarding the center of gravity.

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## Which cross section gives maximum strength in bending?

1. Circular cross-sections have higher resistance to bending moment and deflection than rectangular cross-sections.

## Why are I beams used instead of rectangular beams?

I beams are the choice shape for structural steel builds because of their high functionality. The shape of I beams makes them excellent for unidirectional bending parallel to the web. The horizontal flanges resist the bending movement, while the web resists the shear stress.

How do you find the shear stress of a circular beam?

The maximum shear stress occurs at the neutral axis of the beam and is calculated by: where A = b·h is the area of the cross section. Note that the maximum shear stress in the cross section is 50\% higher than the average stress V/A. Shear Stresses in Circular Sections. A circular cross section is shown in the figure below:

### Where does the maximum bending stress occur on a beam?

The maximum bending stress occurs at the extreme fiber of the beam and is calculated as: where c is the centroidal distance of the cross section (the distance from the centroid to the extreme fiber).