Detailed Description
Structural engineers specifying tubular members for UAV booms and aircraft supports require predictable torsional response under combined axial-bending-torsion loading. Aluminum extrusions exhibit torsional yield at 0.4% shear strain; our filament-wound carbon tubes sustain 1.8% shear strain before onset of matrix cracking.
Layup architecture is customizable: standard [±55° helix / 90° hoop / 0° axial] with fiber angle tolerance ±1.5°. T800 option delivers torsional rigidity (GJ) of 28 N·m² for 30mm OD × 2mm wall-4.1× equivalent 6061-T6 tube. Coefficient of thermal expansion (axial) is tuned to near-zero via 0°/90° ratio adjustment, critical for optical payload gimbal mounts requiring sub-0.05mm thermal drift across -20°C to +60°C.
We provide FEA simulation support including equivalent beam property extraction (EA, EI, GJ) for direct import into your structural model. Each production batch includes fiber volume fraction test (acid digestion), CTE measurement, and torsional spring-rate verification. Full material test reports available for airworthiness dossier compilation. Legal export documentation prepared per destination-country requirements.

Specification
|
Parameter |
Value |
|---|---|
|
Process |
Precision filament winding |
|
Fiber options |
T700 / T800 / M40J |
|
OD |
8mm – 100mm |
|
Wall |
0.8mm – 6.0mm |
|
Torsional GJ |
Up to 28 N·m² (30mm OD) |
|
CTE (axial) |
Adjustable, near-zero option |
|
Layup tolerance |
±1.5° fiber angle |
|
Test reports |
FVF, CTE, torsion, burst |
|
Export |
Legal export, full cert |
Custom FAQ
Q: Can you provide equivalent beam properties for NASTRAN/ANSYS import?
A: Yes, we supply EA, EIxx, EIyy, GJ values per ASTM D5448 for each layup configuration.
Q: Is zero-CTE layup compatible with painted exterior finish?
A: Yes, paint thickness <200μm adds negligible CTE effect; we can model combined CTE if needed.
Q: What batch traceability is provided?
A: Each tube carries lot ID linking to prepreg batch, cure cycle log, and test sample results.
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