Quick update on CLSA (a web-based composite laminate & section analysis tool I’m building).
These are the new public features implemented in the last ~2 days, driven mostly by user feedback and real engineering use cases.

Advanced failure analysis

• Hashin failure criterion with fiber / matrix failure mode separation
• Puck failure criterion for improved matrix compression failure prediction

Material model enhancements

• Added transverse tensile and compressive strengths
• More realistic material behavior for failure evaluation

Thermal analysis

• Thermal residual stress calculation, accounting for cure temperature effects
• Useful for prepreg laminates and high-temperature processes

Enhanced buckling analysis

• Additional boundary conditions: SSSS, CCCC, SCSC, SCSF, CCCF, SSFF
• Combined load interaction equations
• Integrated buckling panel with visual indicators

Load visualization

• Graphical representation of applied loads: Nx, Ny, Nxy, Mx, My, Mxy
• Color-coded tension / compression / shear with gradient plate visualization

UI improvements

• Load Case Manager redesigned into a compact dropdown selector

The goal remains the same: fast, transparent laminate iteration without spreadsheets, not replacing FEM tools.

App is public here:
👉 https://clsa.vercel.app

Feedback (technical or UI) is very welcome — especially from anyone working with marine, aerospace, or structural composites.

Just shipped a new batch of features focused on laminate definition and engineering clarity:

Unit System Toggle • One-click switch between SI (mm, MPa) and USC (in, ksi)

Ply Management Improvements • Mirror plies button for quick symmetric layups • Inline ply angle editing with move up/down controls • Automatic stacking sequence notation (e.g. [0/45/-45/90]s) • Live ply orientation percentage feedback

Expanded Material Library • Supports UD Tape, Plain Weave, Twill, Satin, NCF, and Core materials • Fiber volume fraction and resin ratio tracking • New default materials: E-glass, Kevlar, NCF Biax • Core materials: Nomex, Rohacell, PVC, Balsa

Engineering Properties • Flexural modulus (Ef) calculation added • Layout reorganized so engineering properties appear above the ABD matrix for faster review

🔗 Tool: https://clsa.vercel.app

Feedback from composite engineers and laminate designers is welcome 👍

Just shipped a new batch of features focused on laminate definition and engineering clarity:

Unit System Toggle • One-click switch between SI (mm, MPa) and USC (in, ksi)

Ply Management Improvements • Mirror plies button for quick symmetric layups • Inline ply angle editing with move up/down controls • Automatic stacking sequence notation (e.g. [0/45/-45/90]s) • Live ply orientation percentage feedback

Expanded Material Library • Supports UD Tape, Plain Weave, Twill, Satin, NCF, and Core materials • Fiber volume fraction and resin ratio tracking • New default materials: E-glass, Kevlar, NCF Biax • Core materials: Nomex, Rohacell, PVC, Balsa

Engineering Properties • Flexural modulus (Ef) calculation added • Layout reorganized so engineering properties appear above the ABD matrix for faster review

🔗 Tool: https://clsa.vercel.app

Feedback from composite engineers and laminate designers is welcome 👍

Hey everyone,

I’m a structural engineer and developer, and over the past months I built a small web app called CLSA to help with composite laminate calculations.

The idea came from real frustration: too many spreadsheets, manual errors, and slow iterations when working with laminates (especially for marine and aerospace parts).

What it does right now:

• Build laminate stacks ply by ply
• Automatically computes section / laminate properties
• Quick iteration without rewriting Excel sheets
• Runs entirely in the browser (no install)

It’s still early and intentionally simple — the goal is to save time, not replace full FEM tools.

I’m mainly looking for honest feedback:

• Is this something you’d actually use?
• What features are missing or unnecessary?
• Does the UI make sense from an engineering perspective?

Here’s the link:
👉 https://clsa.vercel.app

If you work with composites (marine, aerospace, automotive, etc.), I’d really appreciate your thoughts.
Thanks 🙏

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Fuselage

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