Three-Dimensional NOn linear Laminate Media Analysis

Materials Input Window

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The material properties window is where the user assigns the various properties to the material(s) used in the analysis.

The materials will save and load to a *.mat file for constant material properties.

The number of materials used in the analysis is entered on the top left. The drop down menu gives known material properties for LAM3D. The Apply to material option has a number to the right. By pressing the Apply button the material properties selected in the drop down menu are applied to that particular material ID.

The View Moduli & Poisson's ratio button displays these properties.

The load and save button can be used to load and save a material to a *.mat file in their currently working directory. The program will load and save a material pertaining to the Material ID being selected. In the window shown above, clicking the save button will save mat. ID 1 to a *.mat file while clicking the load button will populate Mat ID 1 with the material properties from your *.mat file. 

All materials can be can be edited, loaded and saved while the program is running to actively explore potential materials for the laminate design being studied. You will be "warned" in the error window (bottom right on main window) if there is an empty cell in this table. Some Empty cells can cause crashes depending on the property left empty.

Material Properties Table

The following are the inputs used for the constant material property window. All units are imperial units. (Metric units can be used if all units throughout the program are input in metric form)

E1,E2,E3: Young's moduli along the principal ply directions (psi).
v23,v13,v12: Poisson's Ratio in 2-3, 1-3, 1-2 direction respectively.
G23,G13,G12: Shear Moduli in 2-3,1-2,1-3 planes respectively (psi).
a1,a2,a3: Coefficient of thermal expansion
SIG_O_1,SIG_O_2,SIG_O_3: Sigmas
SIG_O_23,SIG_O_13,SIG_O_12: Sigmas
N_1,N_2,N_3: Shape factor
N_23,N_13,N_12: Shape factor

Failure Criteria Table

X1T: Tensile strength of material in principle (1) direction (psi).
X1C: Compressive strength of material in principle (1) direction (psi).
X2T: Tensile strength of material in principle (2) direction (psi).
X2C: Compressive strength of material in principle (2) direction (psi).
X3T: Tensile strength of material in principle (3) direction (psi).
X3C: Compressive strength of material in principle (3) direction (psi).

Y1T: Tensile failure in the fiber (1) direction.
Y1C: Compressive failure in the fiber (1) direction.
Y2T: Tensile failure in the transverse (2) direction.
Y2C: Compressive failure in the transverse (2) direction.
Y3T: Tensile failure in the through-the-thickness (3) direction.
Y3C: Compressive failure in the through-the-thickness (3) direction.
Y23: Interlaminar shear in the 23 direction.
Y13: Interlaminar shear in the 13 direction.
Y12: In-plane shear (12 direction).

For further information on failure theories look at the Theory section.