Self-Sensing Hybrid Fibre-Reinforced Polymer for Structural Health Monitoring (SHM)

Abstract:

Hybrid composite material has been widely used in many engineering applications (e.g., for automobiles)and has several advantages over conventional fibre-reinforced composite materials, such as high strength-to-weight ratio and low cost. However, combining two kinds of reinforcement fibre within a common matrix may lead to different failure modes, such as delamination between the layers and fragmentation when the structure is subjected to high loads. To avoid this problem, real-time damage detection should be integrated into the hybrid composite structures for structural integrity. This paper outlines the working mechanisms and the initial fabrication of an integrated capacitive sensor into the intra-ply hybrid composite. The tensile test was conducted to perform the basic characterization of the proposed sensor and provide self-sensing functionality (smart structure). The results illustrate that damage between layers can be detected by in-situ monitoring. It is shown that the initial damage was detected at the turning point where the relative change in capacitance begins to decrease and when the axial tensile force increases. In addition, the developed smart material has shown a linear sensitivity toward crosshead displacement up to the turning point, and applying the monitoring is useful in self-sensing for hybrid composites.

• Periodical: Key Engineering Materials (Volume 922)
• Pages: 87-93
• DOI: https://doi.org/10.4028/p-64226e
• Online since: June 2022
• Authors: Khalid Alblalaihid, Saleh A. Alghamdi*, Anas Alburayt, Ahmed Alwahid, Meshal Abuobaid, Abdullatif Alshaikh, Sabri Alkhibari, Ibrahim M. Alarifi
• Keywords: Capacitive Sensor, Fiber-Reinforced Polymer Composites, Smart Structure, Structural Health Monitoring

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