2.4 My Laminates

\includegraphics[width=14pt]{./Images/Laminate.png} My Laminates holds your laminates. Laminates are easy to define in the Edit Laminate page, like this:

You just pick what laminas to stack, at what angle, and what thickness each.

Laminates are defined from the bottom up. Layer #1 is always at the bottom. You can simplify your work if the laminate is symmetric with respect to the middle surface by checking the Symmetric check box, but the software always computes the whole laminate.

Besides the laminate stacking sequence (LSS), a laminate has three intrinsic properties:

$\alpha $ is the load factor. CADEC implements partial safety factor design, also called load resistance factor design (LRFD), to handle design for reliability as described in [2, §1.4]. The load factor $\alpha \ge 1$ multiplies the loads to take into account the uncertainty and variability of the loads.

$\phi $ is the resistance factor. The resistance factor $\phi \le 1$ multiplies the material strength values to take into account the uncertainty and variability of the material strength. Methods to estimate both $\alpha $ and $\phi $ in terms of stochastic representation of the experimental data is presented in [2, §1.4].

$d_ f$ is the damage factor. This factor $0\ge d_ f<1$ is used to compute last play failure (LPF) in Chapter Strength.

A Laminate can be used to build Beams and Stiffened Panels, but often it is analyzed just as a Laminate. To analyze a Laminate, go to Chapters/Macromechanics, or Strength, or Damage.