Question
The beam is made from three polystyrene strips that are glued together as shown. If the glue has a shear strength of $80 \mathrm{kPa}$, determine the maximum load $P$ that can be applied without causing the glue to lose its bond.
Step 1
We can do this by taking moments about point A and setting it equal to zero. This gives us the equation: \[0 = 3.6R - \frac{P}{4} \times 2.8 - P \times 1.8 - \frac{P}{4} \times 0.8\] Solving this equation gives us \(R = -0.75P\). Show more…
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