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Script Author: Ian Rivard
Description: Converts between FEMAP property types. v1.01 supports two conversions: PSHELL membrane ↔ plate (toggles the bending behavior on existing PSHELL records) and PCOMP → equivalent isotropic PSHELL via CLT. The PCOMP-to-equivalent path computes the laminate A-matrix, derives equivalent E and t, and creates a new PSHELL record with element references migrated.
Use Instructions: Run the tool. Pick conversion direction. Pick the source properties (multi-select). For PCOMP→equivalent, pick the new material (or let the tool create one). Confirm.
Requirements: Open FEMAP model. For PCOMP→equivalent, the source PCOMP must have valid ply materials with E1/E2/G12/nu12 defined (CLT input).
Notes: The CLT path produces a representative isotropic plate — useful for quick analytical comparisons, fastener stiffness derivations (feeds Make Rutman Fastener when laminates are involved), and as a v1.04 candidate for laminate Rutman support.
Advanced Users: The CLT derivation uses Cholesky on the 6x6 normal equations (same numeric pattern used in ILT Calc's quadric fit). For non-symmetric laminates the equivalent-isotropic projection loses the B-matrix coupling — flagged in the message window. To our users: We appreciate feedback on our tools and encourage you to modify them to your specific needs. If you make an improvement you feel would be valuable to others, please submit it through our contribution page. |
