TY - JOUR
T1 - Real-time electrical impedance monitoring of carbon fiber–reinforced polymer laminates undergoing quasi-static indentation
AU - Almuhammadi, Khaled H.
AU - Yudhanto, Arief
AU - Lubineau, Gilles
N1 - KAUST Repository Item: Exported on 2021-02-19
Acknowledged KAUST grant number(s): BAS/1/1315-01-01
Acknowledgements: This research was supported by King Abdullah University of Science and Technology (KAUST) Baseline Research Funds under award number BAS/1/1315-01-01, and by Collaborative Research Grants under award number URF/1/2281-01-01. The authors would like to thank Mr. Meshal Abdulkareem (KAUST Core Lab) for his assistance in building the data acquisition system; Ms. Ohoud Alharbi (KAUST Core Lab) and Mr. Ran Tao (COHMAS) for their assistance in SEM imaging.
PY - 2018/9/20
Y1 - 2018/9/20
N2 - Laminated composites are vulnerable to damage from out-of-plane loading, particularly impact loading, and the incurred damage is often only detected by evaluating the post-impact condition of the composites. Real-time monitoring techniques are desirable for early detection of damage. Utilizing changes in the electrical properties of composites to track incurred damage is promising, but the interpretation of such measurements is still challenging. Here, an electro-mechanical system is introduced to understand how well we could detect mechanical degradation in carbon-fiber-reinforced polymer (CFRP) plates undergoing a quasi-static indentation (QSI) test, which is representative of an impact load. The system measures the in-situ, real-time changes in impedance and phase angle along the specified conductivity paths. Two different electrode configurations are proposed and tested. In all studied cases, the system effectively detected severe damage, characterized by an immediate reduction in strength, in CFRP. Using our proposed electrode configurations, we discovered that the early detection of barely visible damage strongly depends on two factors: (i) the location of the injection-measurement points with respect to the damage, and (ii) the orientation of the measurement paths with respect to the fibers orientation in the laminated CFRP surface.
AB - Laminated composites are vulnerable to damage from out-of-plane loading, particularly impact loading, and the incurred damage is often only detected by evaluating the post-impact condition of the composites. Real-time monitoring techniques are desirable for early detection of damage. Utilizing changes in the electrical properties of composites to track incurred damage is promising, but the interpretation of such measurements is still challenging. Here, an electro-mechanical system is introduced to understand how well we could detect mechanical degradation in carbon-fiber-reinforced polymer (CFRP) plates undergoing a quasi-static indentation (QSI) test, which is representative of an impact load. The system measures the in-situ, real-time changes in impedance and phase angle along the specified conductivity paths. Two different electrode configurations are proposed and tested. In all studied cases, the system effectively detected severe damage, characterized by an immediate reduction in strength, in CFRP. Using our proposed electrode configurations, we discovered that the early detection of barely visible damage strongly depends on two factors: (i) the location of the injection-measurement points with respect to the damage, and (ii) the orientation of the measurement paths with respect to the fibers orientation in the laminated CFRP surface.
UR - http://hdl.handle.net/10754/628794
UR - https://www.sciencedirect.com/science/article/pii/S0263822318327491
UR - http://www.scopus.com/inward/record.url?scp=85053853549&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2018.09.030
DO - 10.1016/j.compstruct.2018.09.030
M3 - Article
AN - SCOPUS:85053853549
VL - 207
SP - 255
EP - 263
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -