Discussion
A lug or fitting in tension is checked against which failure modes?
Answer: C
Correct answer: Net tension, tear-out and bearing
A loaded lug can fail three ways, and all three must be checked. Tension across the net section, where the hole has removed material; shear tear-out, where the pin pushes a plug of material out to the free edge; and bearing, where the pin crushes the hole. Each gives its own allowable, and the smallest governs. Buckling and torsion do not arise in a lug in tension.
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