Solve FE-style Materials questions and learn the reasoning behind each answer through interactive engineering cases.
Material A had the higher yield strength, but its density penalty was much larger. After sizing both rods to the same factor of safety, Material B produced the lighter design.
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Material A had the higher yield strength, but its density penalty was much larger. After sizing both rods to the same factor of safety, Material B produced the lighter design.
The resistivity formula was correct, but 2 mm² was treated as 2×10^-9 m² instead of 2×10^-6 m². The wire resistance was 0.17 ohm.
The thermal strain was correct, but it was applied as if the bar were only 1 m long. The 2 m bar expanded 2.3 mm.
Dividing the overall composition by the beta composition gave 57%, but phase fractions come from tie-line segment lengths. The beta fraction was 40%.
Practice the calculations, assumptions, constraints, and failure modes that appear around this topic. Each question here is designed to test whether you can apply the concept when the obvious calculation is not the whole engineering decision.