Question: Problem 3 (35 pts) A composite test specimen is symmetrically bonded to four steel tabs with high-strength epoxy structural adhesive. These tabs are loaded in

Problem 3 (35 pts) A composite test specimen is symmetrically bonded to four steel tabs with high-strength epoxy structural adhesive. These tabs are loaded in tension by cylindrical pins (not shown). The goal of this test is for the specimen to break, but for the tabs to remain safely bonded and not specimen is t =3.75mm thick and W=90mm wide. The tab thickness is a (to be designed) and width W=90mm, with a hole diameter d=25mm. The adhesive is bonded to the tabs and specimen over bond length b (to be designed) and the total width of the specimen, W. The safety factor against failure of the tabs or adhesive at the moment that the specimen fails is to be SF=1.5 Find: a) failure load of the specimen, Ffail b) minimum adhesive bond length, b c) minimum tab thickness, a, to resist tab yielding d) minimum tab thickness, a, to resist bearing failure in the pin holes

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