This article investigates the interest of a novel promising approach, dealing with the use of an in-situ piezoelectric (PZT) disk to monitor the whole manufacturing process of a glass fiber/polyester Polymer-Matrix Composite (PMC) plate using the Liquid Resin Infusion (LRI) technique. The real-time in-situ Process Monitoring (PM) is conducted using the electrical signature (capacitance) variation of the embedded PZT transducer, which has never been done so far in the literature for such a purpose. In order to understand the capacitance response, an internal/external multi-instrumentation (Infrared Thermography, thermocouples, Acoustic Emission, Z-displacement and pressure sensing devices) was set on the infusion systems, so that it was possible to make multi-physical couplings between the various obtained measurements and the PZT capacitance curves. It was shown that the PZT capacitance is sensitive to all several steps of the infusion process, especially the gelation and vitrification phases, and can also have Structural Health Monitoring (SHM) applications as it makes the resulting composite part “smart”.

本文研究了一种新颖的有前途的方法的兴趣，该方法涉及使用原位压电（PZT）盘监视使用液态树脂灌输的玻璃纤维/聚酯聚合物-基质复合材料（PMC）板的整个制造过程（LRI）技术。实时原位过程监控（PM）是使用嵌入式PZT换能器的电信号（电容）变化进行的，迄今为止，在此方面，这从未有过做过。为了了解电容响应，在输液系统上设置了内部/外部多种仪器（红外热成像，热电偶，声发射，Z位移和压力感应设备），因此，有可能在各种获得的测量值与PZT电容曲线之间进行多物理耦合。结果表明，PZT电容对输注过程的所有几个步骤都非常敏感，尤其是在凝胶化和玻璃化阶段，并且还可以在结构健康监测（SHM）应用中使用，因为它可以使合成的复合部件“智能”。