An experimental study was conducted to sense interlaminar delamination in carbon-fiber composites utilizing inherent material piezoresistivity. Damage detection was carried out using discrete electrodes mounted on a Double Cantilever Beam (DCB) specimen. The DCB composite specimens were tested for fatigue interlaminar fracture. The traditional two-point probe and four-point probe technique were employed to measure the through-thickness electrical resistance change. Optical marker method was also used to detect interlaminar crack growth. The results show that the two-point probe measurements did not capture effectively the delamination propagation while the four-point probe measurement showed a promising sensing capability in terms of delamination propagation.
- Aerospace Division
Damage Self-Diagnosis in Carbon Fiber-Reinforced Composites Under Fatigue Loading
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Ngabonziza, Y, Boldrini, C, Liaw, B, Li, J, & Delale, F. "Damage Self-Diagnosis in Carbon Fiber-Reinforced Composites Under Fatigue Loading." Proceedings of the ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Philadelphia, Pennsylvania, USA. September 28–October 1, 2010. pp. 797-799. ASME. https://doi.org/10.1115/SMASIS2010-3870
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