Laminate Stiffness
To define a laminate stiffness shell property type, you must specify values for various properties on the Shell Property Definition dialog box on the following tabs:
• Stiffness—The components of the following stiffnesses are relative to the
material orientation you have assigned to the shell. Entries in the fields on this dialog box are optional unless stated otherwise. You define them using the equations described in
Shell Property Equations:
◦ Extensional Stiffness—Type positive real numbers for A11, A22, and A66.
◦ Coupling Stiffness—Entries in these fields are optional.
◦ Bending Stiffness—Type positive real numbers for D11, D22, and D66.
◦ Transverse Stiffness—Type positive real numbers for A44 and A55.
◦ Thermal Resultant Coefficients—The thermal resultant coefficients reflect the additional load applied to the laminate shell as a result of a difference in thermal properties in the ply materials. Creo Simulate assumes that the temperature distribution is uniform through the thickness of the shell. Keep this in mind when typing values in the Thermal Resultant Coefficients area for:
▪ Force
▪ Moment
You can assign a unit to each component from the dropdown list.
• Mass and Rotary Inertia—To perform a modal analysis of your model or if this shell property contributes to the total mass of the model, specify these values:
◦ Mass Per Unit Area
◦ Rotary Inertia Per Unit Area

Laminate stiffness is not available in FEM mode.

For ease of use when modelling composites and the ability to compute ply stresses in the postprocessor, use Laminate Layup rather than Laminate Stiffness