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← ScienceWhich risk increases upon thermal cycling of epoxy-bonded composite joints?
A)Hydrolysis accelerates polymer chain scission
B)Debonding from differential thermal expansion✓
C)Oxidation leads to chain cross-linking
D)Plasticization lowers the yield strength
💡 Explanation
Edge debonding risk specifically increases, caused by differential thermal expansion creating high local stresses exceeding the epoxy's, because thermal expansion coefficients differ significantly. Therefore bond separation occurs, rather than oxidation or hydrolysis that are time/temperature dependent.
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