MAE4385 - Intrinsically smart cement-matrix composites...

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Intrinsically smart cement-matrix composites Topic 5
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Reading assignment Chung, Composite Materials, Ch. 13. No. 130, under “Publications – cement” in website http:// www.wings.buffalo.edu/academic/departme
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Functions Structural Strain/stress sensing Damage sensing Temperature sensing Electromagnetic interference (EMI) shielding Vibration reduction Self-heating
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Applications of strain-stress sensing Structural vibration control Traffic monitoring Weighing (including weighing in motion) Building facility management Security
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Strain/stress sensing Piezoresistivity Direct piezoelectricity
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Piezoresistivity Change of electrical resistivity due to strain Gage factor = fractional change in resistance per unit strain (more than 2) Gage factor up to 700 attained in carbon fiber reinforced cement
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With carbon fiber Tension
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With carbon fiber Tension
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Without carbon fiber Tension
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Applications of damage sensing Structural health monitoring Damage/microstructural evolution study
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