Threaded Preload
With an externally applied load of 40 N, a bolt in a threaded connection experiences a total bolt load of 30 N. If the bolt’s joint coefficient is 0.35, what is the bolt preload in Newtons?
Expand Hint
$$$F_b=CP+F_i$$$
where
$$C$$
is the joint coefficient,
$$P$$
is the externally applied load,
$$F_b$$
is the total bolt load, and
$$F_i$$
is the bolt preload.
Hint 2
Solve for
$$F_i$$
.
The load carried by a bolt in a threaded connection is:
$$$F_b=CP+F_i$$$
where
$$C$$
is the joint coefficient,
$$P$$
is the externally applied load,
$$F_b$$
is the total bolt load, and
$$F_i$$
is the bolt preload.
$$$30N=(0.35)(40N)+F_i$$$
$$$F_i=30N-14N=16\:N$$$
16 N
Time Analysis
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