18




from curing to cryogenic temperature since the epoxy becomes brittle [25], but no data is


available in the complete range of temperatures up to liquid hydrogen temperature. In this


study, the tensile strength of the epoxy is assumed as 100 MPa at cryogenic temperature.


0 -
 Averaged CTE -
 a)
a) -
E (D
(D E
 Actual CTE |

o
o




 / I I I I .


U 100 200 300
 Temperature, T (K)


Figure 2-4. Actual and average CTE

 temperatures.





 6






 D4-
 LU

 o o


 i E
 S 0)
 0 0


of epoxy from curing temperature to cryogenic


Figure 2-5. Young's modulus of epoxy as a function of temperature.


0 80


0
' 60



40


.1
" 20

C.


400 b00


1 I----


1 1 I I I I I I I I I I IIIII-- I -- I