1 2 3 4 5
130mm 32mm
UV-irradiation UV-cationic cure UV-cationic cure UV-cationic cure Thermal cationic Reaction heat cure Thermal cationic Cation Reaction heat cure Cation (a) UV-curing of surface is (b) Chain-curing continues (c) All resin are cured by trigger of chain-curing. toward depth direction. chain-curing, even (Thermal cations are generated.) non-irradiation part. Cure Reaction Front Closed Mold Driving Energy Input UV, IR and so on (Energy-ray) ray) Heat CF Fabric + UV curable resin
Stiffness (Elastic Modulus) Splice Section (Bearing Strength) Flange (Tensile/Compressive Modulus) Web (Shear Modulus) Mechanical Properties Tensile Strength (MPa) Modulus (GPa) Compressive Strength (MPa) Modulus (GPa) Bearing Strength (MPa) CAI * Strength (MPa) *Energy level:6.7j/mm Results 378.6 46.0 402.4 43.0 532.1 98.7
Loading Point Support Point
Flange Web H18 Tg Tg150 6.7J/mm
I I I R 1 2 (a) Optical loss measurement FBG sensor Strain measurement I F Resin I T FBG Refractive index measurement (c) FBG (b) 2 (d) FBG 2nd n d
30mm 30mm 30mm Fiber1 Fiber2 Fiber3 30mm FBG Resin Cure direction Thermocouple 1 Thermocouple 2 Thermocouple 3 2mm Temperature 300 200 100-100 -200-300 -0.06 40 45 50 55 60 65 70 75 80 O R1 C O R2 R1 C O H O 0 R1 Time (sec.) O C R2 R1 O C O H O R1 C O R2 Temperature Strain 0.04 0.02 0-0.02-0.04 2.0 1.0 0-1.0-2.0-3.0 Strain (%)
3.5 mm 250 mm 250 mm
Strain Probe Frequency Intensity 430 Distance 460
X=0.18 m X=0.32 m #3 bolt X=-0.42 m 25mm #6 bolt 150mm X=-0.28 m
Strain [με] 2000 1500 1000 500 0-500 -1000-0.6-0.3 0 0.3 0.6 Position [m] #3 #6
Coupon specimen Double lap shear type 25 mm in width 250 mm in length Structure element type test article Skin with a hat-type stringer 300 mm in width 1000 mm in length Sub-component type test article wing box structure 2000 mm in chord 4000 mm in span 800 mm in thickness
Stringer Stringer / / Rib
/ mm 2 0 22,000 650,000 8100,000 131,000,0000 A-scan Voltage [mv] [mv] Voltage [mv] Voltage / mv Voltage / mv Voltage / mv L-1-1 10 5 0 0 20 40 60-5 -10-15 Time [µsec] 0 20 40 60 L-1-1 10 8 6 4 2 0 Time / sec. Step 2-2 0 20 40 60-4 -6 Step 6-8 -10 0 20 Time [µsec] 40 60 Time / sec. L-1-1 20 15 10 5 0-5 0 20 40 60-10 -15 Step 13-20 Time [µsec] 0 20 40 60 Time / sec.
Health monitoring system FBG sensors
HRAGS () FBG 300 SW 18ch MEMS ASE C ASE HRAGS () FBG 300
1m 2m
PC DAQ FBG3 AWG FBG4 FBG2 FBG1 ASE mm
CFRP 1800mm500mm 16PLY FBG4 9
STRINGER FBG2 FBG1 FBG3 FBG4 VIEW FROM STRINGER SIDE
MgRE Mg Ar 2002005mm Al 1.3 H15 H16 H17 H18 H19 H20
/ MHI / Z / /
0.2 No. (MPa) (MPa) (GPa) Z12a 489 518 42.8 Z12b 481 506 42.8 Z12c 490 513 43.0 Z14a 510 531 43.6 Z14b 488 514 42.9 Z14c 501 525 42.6 493 518 43.0 () 9.8 8.0 10.6 4.1 5.2 5.5 7.2
2 RS 1000kN
0.4 0.8 1000 800 600 400 200 0 RS Mg 97 Zn 1 Y 2 Al RS Mg 97 Zn 1 Y 2 (at%) 1200mm (g/m 3 )
2017 2010 2007 2012 2003 2022 2017 2010 2007 2012 2003 2022
:DAU (Data Acquisition Unit) :DEU (Data Evaluation Unit) :Outline of optical fiber
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