Two-Way Radio User Manual

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SURFACE BEHAVIOR
Repeat this data line in ascend ing order of overclosure value as often as necessary to define
the overclosure as a function of pressure. A minimum of two data lines are required. The
pressure-overclosure relationship is extrapolated beyond the last overclosure point by continuing the
same slope (see Figure 18.47–3).
Clearance
Contact
pressure
Exponential pressure-overclosure relationship
p
0
c
0
K
max
Overclosure
Figure 18.47–1 Exponential pressure-overclosure relationship.
Overclosure
(i -1) d i d
K
i
= s
0
k
dflt
s
i-1
1
0
segment i
P
ressure
i
k
L
s
s
r
d
= segment number
= default stiffness
= element length
= initial scale factor
= geometric scale factor
= overclosure factor
= r L = overclosure measur
e
dflt
elem
elem
0
Figure 18.47–2 Scale factor pressure-overclosure relationship.
18.47–4
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