Macromechanical Analysis of a Laminate
The sixth program conducts the macromechanical analysis of a laminate. The laminate can consist of a single type of lamina, hybrids, and sandwich panels. The material properties for the lamina are selected from the material database of the second program. Next you enter the orientation of the plies and the corresponding material number of each ply in the laminate. You can also read laminate stacking sequences from a data file. Now you can display the orientation and ply properties, the stiffness and the compliance matrices, and the equivalent plate properties of the laminate. Enter the mechanical and hygrothermal loads to calculate the global and local stresses and strains, strength ratios at the top, middle and bottom surface of each ply in the laminate.
A Quick Example
Determine the uniaxial stress you can apply in the x-direction to a (0/45/60/90) Graphite Epoxy laminate. The x-direction is parallel to the fibers in the 0° ply. Use the maximum stress criterion as a basis for your answer. Use the properties of unidirectional Graphite/Epoxy from the lamina properties database.
After inputing the given directions, Promal produces the following outputs
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