FEA Step by Step with Algor
Figure 93 Composite Element Notation
Composite Element Coordinate System
Table 91 identifies the notation for the four coordinate systems that are used in the definition of composite elements.
Table 91 Composite Element Coordinate Systems 

Notation  Description 
X, Y, Z  Global Axes (The axes you used for drawing) 
a, b, c  Local element axes 
x, y, z  Laminate axes 
1, 2, 3  Lamina axes 
Of the above descriptions, the Global Axes should be straightforward. These are X, Y and Z axes that we used when drawing the model. The local element axes (a, b, c) are defined by the following:
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