| With the rapid development of fiber reinforced polymeric composites in various fields of aerospace,shipbuilding,civil engineering,special equipment and so on,the accompanying safety issues have attracted much attention.Once the internal defects and damages originating from composite structures evolve into accidents,it will definitely lead to mass fatalities and injuries.Therefore,it is really indispensable to keep track of the operating status of the high-performance composites in real time.Fortunately,structural health monitoring(SHM)has come into being for solving this problem.Taking the intelligent and cutting-edge sensors as the core technique,SHM plays an important role in both monitoring & diagnosing the health state of composites and quantificationally recognizing structural defects and damages.Furthermore,in recent years,continuous fresh research on carbon nanomaterial-based sensors has also brought good opportunities to facilitate and improve SHM.In this context,with the help of advanced embeddable carbon nanomaterials enabled sensing strategies,this article innovatively puts forward a SHM technology that can meet the through-life composite monitoring requirement.On a great basis of the novel technology,a dynamic failure risk analysis and assessment method are also first developed for the high-performance composites.It can be found while strengthening and promoting the risk management measures of composite-based equipment and facilities,SHM technology has further optimized and perfected the healthy safeguard mechanism of composites.The main contents of this article are as follows:(1)Research on Carbon Nanamaterials Coated Fiber Sensor Enabled Structural Health Monitoring Technology.That is,combining with high-efficiency continuous sensor fabricating craft and integrated composite molding process,a through-life SHM technology was realized by noninvasively integrating the carbon nanomaterial coated fiber sensors into composites during the manufacturing stage.(2)Research on Manufacturing Health Monitoring of Composites Based on the Embedded Sensing Technology.That is,sufficient discussion was first made on the laws and properties of the novel SHM method at manufacturing stage of high-performance composites.And then real-time process piezoresistive effects of varied fiber sensors were analyzed systematically subjected to abnormal manufacturing defects.Finally,we explored and validated the potential sensing mechanism of the SHM technology.(3)Research on Service Health Monitoring of Composites Based on the Embedded Sensing Technology.Specifically,sufficient discussion was first made on the laws and properties of the novel SHM method at service stage of high-performance composites followed by a systematic analysis on real-time damage piezoresistive effects of varied fiber sensors subjected to abnormal structural stress and deformation.At last,we explored and validated the potential sensing mechanism of the SHM technology.(4)Research on Through-life Failure Risk Analysis of Composites Based on the Novel SHM Technology.Namely,by extracting the accurate and measurable health monitoring data from the as-established SHM technology,two types of dynamic failure risk assessment models for both manufacturing and service stages of composites were respectively built,and then risk-based healthy control strategy was raised for enhancing the safeguard system scientifically for composites enabled equipment and facilities.(5)Application Study: Large-area Health Monitoring and Risk Assessment of Composites Using Fiber Sensor Array.That is to study and solve the problem of how to monitor and evaluate the health status and risk level in a large-scale and seamless manner during actual composite industry by expanding the single fiber sensor to fiber sensor arrays. |
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