Issue 15

I. S. Raju et Shuttle land s observed o ose cap on ducted to d

alii, Frattura ed ed followin n OV-103 P OV-105 was etermine wh

Integrità Struttu g the return anel 8R (Fig. observed du at factors an

rale, 15 (2011) -to-flight mi 2(c)), indicat ring refurbis d scenarios c

35-49; DOI: 10 ssion (STS-1 ing a loss of hment (Fig. ontribute to

.3221/IGF-ESIS.1

5.05

102 the In cau eve

on OV-10 rmography in addition, the se investigat nts (e.g., see

3 Panel 10L dication (fro spallation ev ion was subs Ref. 1-6).

. After the m NDE) wa ent on the n equently con

14), an infra coating stren 2(d)). The r these spalla

red gth. oot tion

(a) Post-STS-1

03: OV-103 8

L.

(b)

Post-STS-103

: OV-103 10L .

05 nose cap.

(c) Post

-STS-114 ther

mography: OV

-103 8R.

(d) Observed d n history.

uring refurbis

hment: OV-1

Figure 2 :

RCC spallatio

L O

ADING ENV

IRONMENT S

D

and old rent ture cent t 80 ero. ign r a side out the ture

uring ascent tempe odynamic loa ads analyses chanics analy ding conditio onds after lif nce, both th tributors to ring entry, t resentative e gle regions f 0°C (3000°F perature ran

a mission, th , aerodynam ratures; duri ds act on the showed that ses were pe n. The bou t-off. The de e lift-off an the spallation he Shuttle W ntry trajector or each of t ) and occu ge is -130°C

e Space Shu ic loads act ng entry, the Shuttle. the lift-off a rformed usin nding pressu fect driving d ascent co root cause [ LE panels y from the In he 22 WLE rs in the ho ≤ T ≤ 90°C

ttle is subjec on the Shut Shuttle exp nd ascent lo g a boundin re load occu forces were c ndition and 6]. experience e ternational S panels is ind t panels 8, (±200°F), wi

ted to four d tle; while th eriences pea ading bound g pressure lo rs at the ma alculated for descent and ntry heating pace Station icated in Fig 9, and 10. th -130°C (-2

istinct loadi e Shuttle is k heating; a s the loading ad over an a ximum dynam the boundin landing co that depend , the peak-he . 3. Peak h For the on 00°F) being

ng environm in orbit, it i nd during d on descent ssumed defe ic pressure g pressure lo ndition were s in part on ating entry te eating reach orbit heating the cold con

ents [1]. Du s subjected escent and l and landing ct for the lif condition (m ad, and they dismissed the entry tr mperature al es temperatu /cooling th dition. In th

ring lift-off to extreme c anding, diffe . Thus, frac t-off and as ax-Q) abou were nearly z as being ben ajectory. Fo ong the slip res up to ab ermal cycle, is paper, frac

aer Lo me loa sec He con Du rep jog 165 tem

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