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

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Is<br />

<strong>The</strong> coefficient kla! calculated for variou• values <strong>of</strong> k, is<br />

presented in Table 5.6. Hfere <strong>and</strong> henaeforth the obtained~stresses<br />

are calculated based on the absdlute value wiphout a mov'e precise<br />

definition <strong>of</strong> their signs.<br />

Let us introduce the formula for stresses near the external<br />

contour:<br />

AL Eh k2-_ -. 211n<br />

or n (--p2)a2 (k2--)2--k21n2 '<br />

or<br />

(5:.121)<br />

_AL El I<br />

n 11- O)a2<br />

k<br />

<strong>The</strong> coefficient klb is also giveh in Table 5.6. We introduce<br />

the formulas for analyzing a bellows with its ,angular deformations<br />

(Fig. 5.64b).<br />

i s<br />

<strong>The</strong> angle <strong>of</strong> turn <strong>of</strong> the center with a fixed external contour<br />

A! (k 2 + I)Ink--k2+1<br />

4.-D k2+ 1 (5.122)<br />

the complete turn <strong>of</strong>'the ends <strong>of</strong> the bellows is<br />

Mn (k2I )Ink--k2+ I<br />

Oa- 2.0 k2+1 (5-123)<br />

bending moment in<br />

a radial direction on radius a is<br />

"-~ __D- 4 a ________k2- I<br />

Ila (k 2 +1)Ink k2-1<br />

632

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