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Circle
The solid circular structural shape has a completely filled, round cross-section. Its key characteristic is isotropic behaviour in bending, meaning its resistance to bending is uniform in all directions perpendicular to its axis. It possesses good compressive strength and is also effective in resisting torsional loads, although hollow circular sections are generally more efficient for torsion per unit of material. Common applications include shafts, pins, columns, and foundation piles.
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Calculations
Description
Symbol Name
Value
Unit
Comment
Circle
Radius
5.00
Diameter
10.00
Area
78.54
Circumference
31.42
Distance to centroid (x-axis)
5.00
Distance to centroid (x-axis)
5.00
Second moment of area about x-axis
490.87
Second moment of area about y-axis
490.87
Second moment of area about x1-axis
2454.37
Second moment of area about y1-axis
2454.37
Polar moment of inertia about centre
981.75
Polar moment of inertia about vertex
4908.74
Radius of gyration about x-axis
2.50
Radius of gyration about y-axis
2.50
Radius of gyration about z-axis
3.54
Radius of gyration about x1-axis
5.59
Radius of gyration about y1-axis
5.59
Radius of gyration about z1-axis
7.91
Elastic section modulus
98.17
Plastic section modulus
166.67