I CD is said to be the moment of inertia of the rectangular section about the CD line.

D is said to be the depth of the ABCD rectangular section.

B is said to be the width of the ABCD rectangular section.

Now we’ll calculate the area moment of inertia for the rectangular section centered on this line CD. We would then assume that one of the lines will pass through the rectangular section’s base. We’ll start with one rectangular section ABCD, as shown in the figure below. I y = hb 3/ 12 Calculating Moment of Inertia of Rectangle Section We’ll get the following equation as a result: (3) A Centroidal Axis Perpendicular to Its Baseīy alternating the dimensions b and h from the first equation given above, we can determine the moment of inertia of a rectangle by taking the centroidal axis perpendicular to its base.

D is said to be the perpendicular distance between the x and x’ axes.

I x = moment of inertia in arbitrary axis.

If we recognize the moment of inertia of the non-centroidal axis with respect to a centroidal axis parallel to the first, we can find it here.

The parallel axis theorem could be used to calculate the area moment of inertia of any shape present in any parallel axis. It is seamlessly determined by applying the Parallel Axis Theorem because the rectangle centroid is located at a distance equal to h/2 from the base. The moment of inertia of a rectangle has been expressed as follows when an axis passes through the base: (2) Moment of Inertia of Rectangle An Axis Passing Through Its Base The rectangle width (a dimension parallel to the axis) has been denoted by b, and the height is denoted by h (dimension perpendicular to the axis).

Derive area moment of inertia circle