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The illiberal turn in Europe has many facets. Of particular concern are Member States in which ruling majorities uproot the independence of the judiciary. For reasons well described in the Verfassungsblog, the current focus is on Poland. Since the Polish development is emblematic for a broader trend, more is at stake than the rule of law in that Member State alone (as if that were not enough). If the Polish emblematic development is not resisted, illiberal democracies might start co-defining the European constitutional order, in particular, its rule of law-value in Article 2 TEU. Accordingly, the conventional liberal self-understanding of Europe could easily erode, with tremendous implications.
Carbon-fiber-reinforced plastics are widely used in lightweight marine structures due to their high strength and superior fatigue behavior. In this article, we will present an innovative methodology for simultaneous load and structural monitoring of a carbon-fiber-reinforced plastic rudder stock as part of a big commercial vessel. Experimental results are presented here from a quasi-static tensile test in which the load monitoring is performed using embedded strain sensors. Structural monitoring is based on high-frequency electromechanical impedance spectroscopy combined with dedicated signal processing and surface-mounted piezoelectric transducers. We have achieved the following results: (1) the demonstration of a hybrid monitoring system including load and structural monitoring, (2) successful embedding of strain gauges during composite manufacturing of the carbon-fiber-reinforced plastic rudder stock, (3) development of instrumentation hardware for multichannel electromechanical impedance measurements, and (4) successful damage detection by means of electromechanical impedance spectroscopy in thick carbon-fiber-reinforced plastic rudder stock samples exploiting strain data.