Direct Stamping, Infrared Welding Enables 64-Ply Thermoplastic Composite Rib

Why It Matters

The innovation proves that thick, high‑performance thermoplastic components can replace aluminum, delivering weight, cost, and carbon‑footprint advantages critical for next‑generation aircraft.

Key Takeaways

• 64‑ply CFRTP rib reduces weight 22% versus aluminum
• Direct stamping cuts cycle time, eliminates consolidation step
• Infrared welding removes rivets, cuts assembly cost 15%
• 12.5 tons CO₂ saved per rib over aircraft lifetime
• Full recyclability achieved with thermoplastic composite

Pulse Analysis

Thermoplastic composites are reshaping aerospace structures as manufacturers chase lighter, faster‑producing, and greener airframes. Carbon‑fiber‑reinforced thermoplastic (CFRTP) offers the high specific strength of carbon fiber with the melt‑processability of thermoplastics, enabling rapid tooling and repeatable production. Yet scaling CFRTP to thick, highly loaded components such as wing ribs has remained a hurdle because traditional lay‑up and curing cycles are time‑intensive and often require secondary joining operations. The Highly Loaded Thermoplastic Wing Rib demonstrator, a joint effort led by French Tier‑1 supplier Daher, proves that a 12‑mm, 64‑ply rib can meet aircraft performance targets while delivering substantial weight savings.

The project’s breakthrough stems from two patented processes. Direct stamping, developed by Daher, merges lay‑up and forming in a single step, eliminating a separate consolidation stage and shaving minutes off each cycle. LIST’s infrared welding fuses the two L‑shaped sub‑components into a T‑shape without rivets, cutting assembly cost by roughly 15 % and reducing the production cycle by a quarter. Both techniques preserve the fiber architecture, maintain structural integrity, and enable fully recyclable thermoplastic parts, addressing the aerospace sector’s demand for high‑rate manufacturing and end‑of‑life sustainability.

With a 22 % weight reduction versus conventional aluminum, a 12.5‑ton CO₂ savings per rib over an aircraft’s service life, and full material recyclability, the rib sets a new benchmark for sustainable airframe design. The demonstrator aligns with Airbus’s Wing‑of‑Tomorrow roadmap and positions Daher and its partners to influence upcoming certification pathways for CFRTP structures, such as the CARAC TP program. As airlines and OEMs tighten cost and emissions targets, the ability to produce thick, load‑bearing thermoplastic ribs at scale could accelerate the transition from metal to composite primary structures across next‑generation commercial jets.