[D09] validation.ipynb: Cells 1-3 (CLT + FEA Run + Table)

[Siddardth7]

Due: April 4 | Day 9 of 14

• Cell 1: Call evaluate_laminate() for baseline layup. Display ABD matrix as DataFrame. Display per-ply table (ply #, orientation, strains, Tsai-Wu, Hashin FT/FC/MT/MC).
• Cell 2: Call CalculiX via subprocess.run() from notebook. Confirm solver exits cleanly. Display stdout/stderr output.
• Cell 3: Call parse_ccx_results.py → display FEA centre deflection + σₓₓ. Display CLT vs FEA % error comparison table inline.
• Run Cells 1–3 sequentially — confirm no errors

✅ Done when: Cells 1–3 execute in Jupyter. Per-ply table and comparison table display inline without errors.