Page 188 - Aircraft Stuctures for Engineering Student

172 Structural instability

I
I
14 I
I-Loaded edges clamped

\
I u

Unloaded edges clamped
One unloaded edge clamped
one simply supported
Both unloaded edges
simply supported

One unloaded edge clamped
one free
One unloaded edge free
I I 5 one simply supported
0 1 2 3 4

56 -
52 - Unloaded edges clamped

I5 -

k 40- I3 -
Clamped edges
36 - II -
k
9-
Simply supported
7-
5,
1 2 3 4 5
a/b a/b
(b) (C)
Fig. 6.16 (a) Buckling coefficients for flat plates in compression; (b) buckling coefficients for flat plates in
bending; (c) shear buckling coefficients for flat plates.