Version 1.0, August 31, 2001, Copyright, Hugh Jack 1993-2001

14.3 CENTROIDS

 

· This is also known as the geometric centre, or first moment of area.

 

· The fundamental definition for Centroids is given below, although a more efficient method for problems with simple geometries is discussed later.

 

 

· When finding centroids, look for symmetry, the centroids will be in the center of symmetrical sections.

 

 

 

· A simple example of application for these relationships is given below,

 

 

· Lets try a more practical problem using the centroid, ([Hibbeler, 1992], prob. 9-16, pg. )

 

 

 

· Consider the example below,

 

 

 

 

 

14.3.1 Finding Centroids Using Composite Shapes

14.3.2 Pappus and Guldinus - Rotated Sections

14.3.3 Practice Problems