ANALYSE VIBRO-ACOUSTIQUE
2
ANALYSE VIBRO-ACOUSTIQUE Paulstra SNC - France 61, rue Marius Aufan 92309 Levallois-Perret Cedex T. : +33 1 40 89 53 31 F. : +33 1 47 57 28 96 [email protected] www.paulstra-industry.com ©Photos : Paulstra
Transcript of ANALYSE VIBRO-ACOUSTIQUE
ANALYSE VIBRO-ACOUSTIQUE
Paulstra SNC - France61, rue Marius Aufan
92309 Levallois-Perret CedexT. : +33 1 40 89 53 31F. : +33 1 47 57 28 96
www.paulstra-industry.com ©Ph
otos
: Pa
ulst
ra
Silicone Fatigue LifeEndurance improvement
New material for tail rotor damperMaterial stiffness range
0.00000
2.00000
4.00000
6.00000
8.00000
0.01 0.10 1.00 10.00
G' (
Mpa
)
Strain (%)
Stiffness properties of X6 materials
Material 2
Material 1
Current material
0.00000
0.20000
0.40000
0.60000
0.01 0.10 1.00 10.00
tan
delt
a
Strain (%)
Damping properties of X6 materials
DurabilityTechnical breakthrough
0
1000000
2000000
3000000
Current Material
New Material 1New Material 2
Dur
abili
ty (c
ycle
s) a
nd
stiff
ness
(Pa)
Durability on samples
Durability
Stiffness
Cold propertiesSame properties as the reference
0
2
4
1.00 10.00Cold
rati
o G
’ -45
°C /
25°C
Strain (%)
Material 1
Current Material
Durability on demonstrators
Condition
Current material
Life / Starting cracking criteria
(kcycles)
New material 1
Life / Starting cracking criteria
(kcycles)
6 +/- 1 mm 10 000
6 +/- 2 mm 250 4 500 without cracks
6+/- 3 mm 94 2 400
Silicone Green Material
High Damped SiliconeHistory of damping material
Status
Silicone lab and silicone production unit are used to develop and make Green Silicone
Reference Current material PDMS Green SiliconeDamping @ 10% 20° - 35° 5° - 10 - 20° 40 - 55°
Association of mixing process and chemistry
