NASA Technical Reports Server (NTRS) 20050057089: On-Orbit Repair of RCC Structures

1.2 MB·English

by  NASA Technical Reports Server (NTRS)

On-Orbit Repair of RCC Strucinres

M, Singh
OSS Group, Ine,
Glenn Research
Cleveland, OF 44135

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On-oriit eepair tectuologies toe
structstey ane eritionfly uewded Lar spuce shuttle reten
These technologies are alee artivally needed fe
thecroal prmectioa system of fgre Cra Baty Ve
exploration prograrss. GRAAUR (Gleam Adtiesive Re:
Fatcziar Repaiey has sews omuttive capability Sor Fospace
rs mel sincli ems ih space shuttle Keinforoed Carbon Garton (RCL
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‘On-Orbit Repair of ACG Structures

Singh
ASS Grows, inc.

NABA Gienn Research Center
Cleveland, OH 444

Acknowledgments

*Glonn Resaarch Center/08S Group, inc.

~Bloanar Siamala EADIE itary, Puree Unsorstys
«Johnson Spsce Center, Houston, TX
+ Brin Maynau, & Aodiguee, sow Plcss, ane aco Stl

« ftdarshall Space Flight Center, Huntsville, AL

ive Etingor, Meu Tasry
+ Ames Resvarch Center, GA

Frans 6.2, Saorge Rate
ATK Thoixa!

‘Dae Lester ar Pasa Tol

nf det Test Fain Sta

Testing Set

Fah Sarge, loa Philp, Jeera Pulao, OSS Group, Ine

&
Outline

+ RCE Repair Objectives
+ On-Orbit Repair Techaclngios
+ GRABER. Key Matariat Properties
+ Testing and Characterization

— Aredet Teating

— Plasma Torch Tesiing

~ Miorustrusturel Chersetertzation,
+ Summary and Conctusions

+ tureduetten
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Thermal Protection System (TPS)
Demage Mechentsms

i
i
> impact carnege curing ground handing |
+ Damage due to falling of ioe or other objects |
during launch i

+ icrometeoraid and orbitai debris impact
+ Demage caused by dtforont actors daring |
faunch anc reentry (weather, launch acoustics, |
shearing, ote.)
|
|
i
| Leading Edge Structural Subsystem (LESS}
| RGC Components Qvervlew
}

Damage to Leading Edges During Testing
AGC Repair Team Obje:

ives

| = Develo, cently aad dativer un Orbiter RCC
Ropa'r mad kite "opair cntestraphie esmage

ihe Leading Edge AGC eubeyotone

iNosecap, Chin penol & Wing Landing dus}

| ~ provide necesscy procs
any required EVA tools (EVA)

10 XA to develop

— Provide supportipradvets ta MOD tor on-erbit
jerational procecures development
AOD/OFTP)

— Provide 2 DTO kd & demanstrated RCC repalr
sapability for S15 812

Repalt Concept tor WLE Damage and
Location Lrnitations

anot Lasatton Littstone
onmemncata arash in ta ACG sree, aut ey

exes wort eu!

+ Pg oan a :sameh sce hols arovted ade ears
|” setine domsape m ancommorata bolo inner eeretone
anal agen where mien Sg aga’ ha ral
Glenn Reiractory Adheelve for Bonding and
Exterior Repair
(GRABER)

+ Adhesive based on organic (Paenoiies end Furan}
based systems arth 2 nuneher of inorganic.
constityenis.

+ Niscosity and curing behavior ime, temperature)
can he tallored ta ault te neada,

+ GRABER bae boon uscd to propre a wide varity
Gf cerantio fiber weaves (C, S102. 8:0),

* ibonde very well wih @ wide variety of surfaces:
and cures up ts 120 0.

|

&

Multifunctionatity of GRABER Based Materiats

+ Crack Ropate Uatortale
Fagard age sets i
+ Adesive and Seniants
Bere ani seal the edges sn pug carenpt i
«Inner te Outer Moid Line (TOM) Materisis:
Pid ng Some
+ Fiexiaie Propeogs
Terrsoncokrtpecet ge aienderace
+ Mapuzacturing of Buk Gampostise
+ Repalr af CiC Saged Compasites |
+ Punetionsily Staded Coatags for CC
Composites i
Foproductbitily, Storage, anc Shelf Life
Characterization

|
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Brookfield PVS Rheometer Used for the
Viscosity Measurements

Ryle nt

gcionge syrsnasiioase neseapenmny tere
ROR Ea HONS SOREL

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signs jen and mn myirg

Reproduclbiiity of GRABER 58.
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| lena! oc
Storage Temperature Etfecta on GRABER 5A,

Matedal Stoed ina Rel H

Storage Effects on GRABER 5A,
thatorini Storod in 9 Frenzor at -15

i aie sont or eitorwe re ¢
‘yp of easy evn 5 rah

tla stn
vel ian
‘Crack Hepsir, Arcist Testing, and
Post Test Characterization

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