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Reliability
Triple Layer Structure
·There is no net force (per unit length) at position z
n
, thus:
·The neutral layer locates at
E t + E t
( + t )
R
r
t
f
f
s s
b
s
b
z =
+
n
(
2 E + E )
(E + E t
)
s
b
s
b
s