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← ScienceWhich outcome results when cyclic loading exceeds material's endurance limit of a steel suspension bridge cable?
A)Progressive crack initiation and bond scission✓
B)Increased cable tensile strength overall
C)Elastic deformation becomes purely plastic
D)Cable temperature exponentially decreases rapidly
💡 Explanation
Fatigue failure occurs through progressive cable failure due to repeated stress; bond scission occurs at the molecular level because repeated stress weakens metallic bonds in the steel; therefore, crack propagation occurs gradually rather than sudden yielding, under a static load.
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