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← TechnologyWhich outcome occurs when high bending stress exceeds a cantilevered steel beam’s capacity?
A)Plastic deformation via yielding occurs✓
B)Elastic strain energy restores shape
C)Fatigue crack growth accelerates rapidly
D)Beam natural frequency significantly increases
💡 Explanation
Plastic deformation occurs because exceeding the yield strength causes dislocations via the yielding mechanism; therefore the beam permanently deforms, rather than returning to its original shape or fatiguing due to crack formation under cyclic loading.
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