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

; !;
and relationships (1.46) assume the form ,
I j br+ MI ±. I;
I + (1.48)
For the uniaxial stressed state
5' ''
!, -x+aAt; ) (1.49)
The results obtatned have simple physical meaning.
In generalized fci'm they can be jýresented as
"Y , (1 .50)
where e is the thermal deformation of a free part; y is elastic
"deformafion of a part occurring due to contained thermal deformation.
Thus, the tolal deformation of the heated part is made up of
its free thermal expansion and 'elastic deformation due !to
the containment of this deformation.
Thermal stresses
are determined only by the-elastic component
of' deformation. Finding it Ls the basic difficulty in analysis.
Thermal deformation c is
always known; for example, for a rod
0 ,
This sirmplifies obtaining a numerical result.
The rules of
the qtressed state of a heated part show a substantial 'difference
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