Design and Stress Analysis of Extraterrestrial ... - The Black Vault

- capable of resistance to neutron fluxes without. substantial
change in deformation diagrams;
-'compatability with corrosive working media;.
- low e'raporation rate in the vacuum of space.
How do the materials actually behave?
The strength limit of structural materials rapidly drops with
an increase in temperature and length of or ration (Fig. 1.22a) and
scarcely changes from the irradiation of neutron fluxes. Viscosity
of the material is reduced and the cold brittleness threshold rises.
In. the deformation pattern, as it were, the scale is reduced along
the axis- of the abscissas (Fig-. 1.22b). Therefore, the caldulation
of strength--reserve for structural-,materials- in -neutron fluxes.
diffez.s little from ordinark calcý.ations. Plasticity reserve,
however, should be determined while taking the distortion of the
deformation diagram into account.
The selection of structural materials depends upon the working
medium and its
compatibility with certain materials.
dj 61 dt'6 6
a) tcb) 1
Variation in material strength
as a function of time and tempera-
as a function of irradiation by
Fig. 1.22.
limit: a)
tures; b)
neutrons.
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