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STRESS ANALYSIS

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Section Areas of Top and Bottom Cap

Section Area near central rail and side rail are calculated below. Conservativley assume the thickness of member 4 & 5 are all reduced to 0.028".

Figure 3 - Section Areas of Top and Bottom Cap

Refer to AEROC 6.4.FS.3 Section 3.15.4 Page 21

A.top_cap_crossection .293 in 2^* :

A.bottom_cap_crossection .335 in 2^* :

When downward load appied to the bulkhead, the top cap is subjected to compression from moment reaction, the cross section area of the top cap is smaller than the bottom cap, hence the instability of the top cap is critical.

A 0.07000 0.03000 0.03000 0.01600 0.01600 0.03500 0.03500 0.01600 0.03200 91 mat :

x 0.6500 - 0.3000 - 0.3000 - 0.2500 - 0.2500 - 0.5000 0.5000 0.7500 1.000 91 mat :

I 0 0.0009 0.0009 0.0003 0.0003 0.0026 0.0026 0.0003 0.0026 91 mat :

define input column

define sum initial values for sum

SA 0 :

SAx 0 :

SAx2 0 :

SI 0 :

i 1 A rows range N i el i : Ax i el A i el x i el * : Ax2 i el Ax i el x i el * : SA SA A i el + : SAx SAx Ax i el + : SAx2 SAx2 Ax2 i el + : SI SI I i el + : 71 line for

define count column - N

define column AX & AX2

define sum

Ax 0.0455 - 0.009 - 0.009 - 0.004 - 0.004 - 0.0175 0.0175 0.012 0.032 91 mat

Ax2 0.0296 0.0027 0.0027 0.001 0.001 0.0088 0.0088 0.009 0.032 91 mat

summary of calculated column AX & AX2

SA 0.28

SAx 0.0075

SAx2 0.0955

SI 0.0105

Table N A x Ax Ax2 I augment :

Table 101 el Sum :

Table 103 el --- :

Table 105 el SAx2 :

Table 102 el SA :

Table 104 el SAx :

Table 106 el SI :

Header No A x Ax Ax^2 I 16 mat :

Header Table SI SAx2 SAx SA A.bottom_cap_crossection A.top_cap_crossection Header Table Ax2 Ax N SI SAx2 SAx SA I x A A.bottom_cap_crossection A.top_cap_crossection SI SAx2 SAx SA A.bottom_cap_crossection A.top_cap_crossection

Table
1.0000	0.0700	-0.6500	-0.0455	0.0296	0.0000
2.0000	0.0300	-0.3000	-0.0090	0.0027	0.0009
3.0000	0.0300	-0.3000	-0.0090	0.0027	0.0009
4.0000	0.0160	-0.2500	-0.0040	0.0010	0.0003
5.0000	0.0160	-0.2500	-0.0040	0.0010	0.0003
6.0000	0.0350	0.5000	0.0175	0.0088	0.0026
7.0000	0.0350	0.5000	0.0175	0.0088	0.0026
8.0000	0.0160	0.7500	0.0120	0.0090	0.0003
9.0000	0.0320	1.0000	0.0320	0.0320	0.0026
Sum	0.2800	---	0.0075	0.0955	0.0105
#
No	A	x	Ax	Ax^2	I
#
#
#

REO6 53 - V269 -

Moment of Inertia Calculation

PAGE 1

REO6 53 - V269 -

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