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← ScienceWhich risk increases significantly when a composite aircraft wing experiences microcracking?
A)Rapid structural disbond or delamination✓
B)Increased resistance to thermal expansion
C)Enhanced fuel efficiency at high speed
D)Improved damping of mechanical vibrations
💡 Explanation
Microcracking causes accelerated crack propagation because the mechanism of **stress concentration** at crack tips weakens intermolecular bonds; therefore, disbond occurs rather than maintaining structural integrity due to redistributed stress.
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