Incombustible, Inorganic  Fiber-reinforced Composites  for Shipbuilding

Backens, Simon; Unseld, Johannes; Glück, Nikolai; Wolter, Albrecht

doi:10.1007/s41777-019-0059-7

Cited by 3 publications

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“…The undoubted advantages of composites are simple modifiability of the structure for the target use, low production cost, good corrosion resistance, and high strength–thickness ratio. Due to these facts, composites found extensive use in various branches of modern industry, such as shipbuilding (machine enclosures) [ 1 ], offshore (pipelines) [ 2 ], civil engineering (reinforced foundations, sewage pipes) [ 3 ], power engineering (rotor blades in wind turbines) [ 4 ], aerospace (crew capsules, satellites) [ 5 ], and even in biomedicine (implants) [ 5 ]. Composites are the first choice in case of weight reduction, fire and thermal protection, and invariable dimensions or stiffness.…”

Section: Introductionmentioning

confidence: 99%

“…Exemplary defects in composites include fiber breakages, cracks, porosities, fiber misalignments, and delaminations [ 1 , 2 ]. Therefore, it is essential to perform nondestructive testing of composites at the production stage and during the operation.…”

Section: Introductionmentioning

confidence: 99%

“…However, it requires further study to optimize the design of the transducers and the testing parameters following the carbon fiber-reinforced composite specificity. It is predominately due to the relatively low conductivity and material anisotropy [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

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Nondestructive Examination of Carbon Fiber-Reinforced Composites Using the Eddy Current Method

Łukaszuk

Chady

2023

Materials

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This paper presents the results of experiments using the eddy current system designated for nondestructive inspection of carbon fiber-reinforced composites. For this purpose, the eddy current testing system with a differential transducer with two pairs of excitation coils oriented perpendicularly and a central pick-up coil was utilized. The transducer measures the magnetic flux difference flowing through the pick-up coil. The transducer of this design has already been successfully utilized to inspect isotropic metal structures. However, the anisotropy of the composites and their lower conductivity compared to metal components made the transducer parameters adjustment essential. Thus, various excitation frequencies were considered and investigated. The system was evaluated using a sample made of orthogonally woven carbon fiber-reinforced composites with two artificial flaws (the notches with a maximum relative depth of 30% and 70%, respectively, thickness of 0.4 mm, and a length of 5 mm). The main goal was to find a configuration suitable for detecting hidden flaws in such materials.

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