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← TechnologyWhich mechanism leads to harmonic resonance in surface grinding due to tolerance issues?
A)Chatter mark formation✓
B)Workpiece plastic deformation
C)Abrasive grain attrition
D)Thermal expansion mismatch
💡 Explanation
Chatter mark formation happens through forced vibration; dimensional inaccuracies lead to inconsistent grinding forces. This triggers self-excited vibration, also known as regenerative effect, because the tool excites modes rather than correcting them, therefore creating chatter rather than smooth grinding.
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