6 Macromechanics

The Macromechanics chapter contains most, if not all, of the formulas in chapter Macromechanics of the textbook. Here you can predict how a laminate will behave from the point of view of stiffness and deformation. First you have to build the object laminate from more basic objects, namely laminas, that of course you have defined earlier. You build laminas in My Documents/My Laminas. You build laminates in My Documents/My Laminates.

The underlying idea of Macromechanics is to represent a laminate as closely as possible to an orthotropic plate. This an appealing idealization because it allows us to think of the laminate in simpler terms, like we would think of a sheet metal plate. This abstraction does not require us to loose any details about the laminate. The software can go back to the details, including stress/strain/damage in the laminas, and even down to fibers and their surrounding matrix. Another motivation is that solutions to boundary value problems for orthotropic plates are available in handbooks such as Roark’s Formulas for Stress and Strain.

On left menu tree, if you expand \includegraphics[width=14pt]{./Images/expand.png}Macromechanics, then you expand \includegraphics[width=14pt]{./Images/expand.png}Intact Material, you get something like this:

\includegraphics[]{./Images/Macromechanics.png}

Figure 6.1: Macromechanics in the tree view. Click the Back button on your browser to return to your previous page.

Next, we describe the features available in each link, one by one, for Intact Material. The pages for Degraded Material are identical except for the value of damage factor.