X-ray computed tomography characterization of manufacturing induced defects in a glass/polyester pultruded profile

Baran, İsmet; Straumit, Ilya; Shishkina, Oksana; Lomov, Stepan Vladimirovitch

doi:10.1016/j.compstruct.2018.04.030

Cited by 46 publications

(24 citation statements)

References 33 publications

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“…159 Insufficient impregnation of fibers with the polymer matrix results in porosities, voids, and fiber misalignment. 158,476,477…”

Section: Mechanical Properties Of Pultruded Materialsmentioning

confidence: 99%

“…Baran et al. 158 pioneered the use of X-ray computed tomography for the examination of defects in pultruded L-shaped profiles. Essiga and Kreutzbruck 479 confirmed the possibility of using air-coupled ultrasonic transducers to examine the quality of thermoplastic-pultruded CFRP tapes.…”

Section: Mechanical Properties Of Pultruded Materialsmentioning

confidence: 99%

“…Pultrusion is potentially a way to produce long constant-chord blades and wind turbine blade roots. [156][157][158][159] For instance, the cost of wind-generated energy fell dramatically from $0.25/kWh in the last 40 years, and now, it costs almost the same as fossil fuels. FRP-based wind-turbine blades provide high stiffness at reduced weight and are ideally suited for increasing the length of the structure.…”

Section: Energy Systemsmentioning

confidence: 99%

“…159 Insufficient impregnation of fibers with the polymer matrix results in porosities, voids, and fiber misalignment. 158,476,477 Non-destructive testing (NDT) is a technique allowing to investigate the quality of the final product without compromising its integrity, saving both time and money. Regardless of the papers mentioned previously, there is still a lack of knowledge on the application of NDT for examination of pultruded structures.…”

Section: Future Trendsmentioning

confidence: 99%

See 3 more Smart Citations

Pultruded materials and structures: A review

Vedernikov

Safonov

Tucci

et al. 2020

Journal of Composite Materials

157

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Currently, the application of pultruded profiles is increasing owing to their advantages, such as light weight, high strength, improved durability, corrosion resistance, ease of transportation, speed of assembly, and nonmagnetic/nonconductive characteristics. This review analyzes the main application fields of elements produced by pultrusion manufacturing processes: bridges and bridge decks, cooling towers, building elements and complete building systems, marine construction, transportation, and energy systems. Analysis of the scientific literature in relation to the mechanical behavior of pultruded elements is presented as well. Finally, this review outlines the future study possibilities, giving the researchers and practitioners the directions for deeper investigation of specific features and exploration of new ones concerning the mentioned aspects of pultruded fiber-reinforced polymer composites.

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“…159 Insufficient impregnation of fibers with the polymer matrix results in porosities, voids, and fiber misalignment. 158,476,477…”

Section: Mechanical Properties Of Pultruded Materialsmentioning

confidence: 99%

Section: Mechanical Properties Of Pultruded Materialsmentioning

confidence: 99%

Section: Energy Systemsmentioning

confidence: 99%

Section: Future Trendsmentioning

confidence: 99%

See 2 more Smart Citations

Pultruded materials and structures: A review

Vedernikov

Safonov

Tucci

et al. 2020

Journal of Composite Materials

157

View full text Add to dashboard Cite

show abstract

“…In addition, the structural damage due to UV light was investigated for different epoxy resin composites [ 54 ]. Baran et al [ 55 ] investigated the internal geometry of glass/polyester pultruded profiles using Micro-CT. Poor alignment of the fibers and resin-rich areas were successfully captured, and porosity was characterized, using density segmentation.…”

Section: Introductionmentioning

confidence: 99%

A Review of Current Challenges and Case Study toward Optimizing Micro-Computed X-Ray Tomography of Carbon Fabric Composites

et al. 2020

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X-ray computed tomography provides qualitative and quantitative structural and compositional information for a broad range of materials. Yet, its contribution to the field of advanced composites such as carbon fiber reinforced polymers is still limited by factors such as low imaging contrast, due to scarce X-ray attenuation features. This article, through a review of the state of the art, followed by an example case study on Micro-computed tomography (CT) analysis of low X-ray absorptive dry and prepreg carbon woven fabric composites, aims to highlight and address some challenges as well as best practices on performing scans that can capture key features of the material. In the case study, utilizing an Xradia Micro-CT-400, important aspects such as obtaining sufficient contrast, an examination of thin samples, sample size/resolution issues, and image-based modeling are discussed. The outcome of an optimized workflow in Micro-CT of composite fabrics can assist in further research efforts such as the generation of surface or volume meshes for the numerical modeling of underlying deformation mechanisms during their manufacturing processes.

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Saturated transverse permeability of unidirectional rovings for pultrusion: The effect of microstructural evolution through compaction

Yuksel,

Caglar,

Broggi

et al. 2024

Polymer Composites

Self Cite

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The transverse permeability of roving/tow‐based fiber reinforcement is of great importance for accurate flow modeling in the pultrusion process. This study proposes an experimental approach to characterize the roving‐based fiber beds' permeability under different compaction conditions. The experimental permeability results of thick roving‐based preforms were reported and compared with the permeability values of roving‐based preforms in the literature. A representative preform was infused under vacuum conditions. Its thickness was varied to replicate the different compaction values observed in permeability tests. Micrographs were then collected from it and analyzed to highlight the microscale transformations caused by processing/compaction on the fiber arrangement. The analysis revealed that compaction resulted in the reorganization of filaments along the direction of the applied compaction. Overall, the uniformity of the spatial filament distribution, i.e., the homogeneity within the fibrous domain, increased with increasing compaction. Furthermore, the microstructural analysis demonstrated transverse anisotropy within the tested domains, indicating that the obtained permeability results represented an upper boundary. In addition to the experimental analyses, various transverse permeability models, which were developed based on recently introduced statistical descriptors of fiber distribution, were evaluated by using the statistical descriptors extracted from the analyzed cross‐sections. Among these models, the one correlating the second neighbor fiber distance with apparent permeability exhibited good agreement with the experimental results.Highlights Transverse permeability measurement of a roving‐based reinforcement was presented. The influence of compaction on the microstructure was investigated at the filament level. Filament distribution in a pultruded profile was analyzed by using statistical descriptors. The results of the experiments and the models in the literature were compared. The correlation between microstructural features and apparent permeability was discussed.

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X-ray computed tomography characterization of manufacturing induced defects in a glass/polyester pultruded profile

Cited by 46 publications

References 33 publications

Pultruded materials and structures: A review

Pultruded materials and structures: A review

A Review of Current Challenges and Case Study toward Optimizing Micro-Computed X-Ray Tomography of Carbon Fabric Composites

Saturated transverse permeability of unidirectional rovings for pultrusion: The effect of microstructural evolution through compaction

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