A review of applications of CT imaging on fiber reinforced composites

Gao, Yantao; Hu, Wenfeng; Xin, Sanfa; Sun, Limin

doi:10.1177/00219983211050705

Cited by 26 publications

(10 citation statements)

References 149 publications

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“…In X-ray CT scanning [44][45][46][47], the X-ray passes through a composite laminate from different angles to create multiple images. These images can then be reconstructed to yield an arbitrary slice or a full 3D image of the laminate showing the size and distribution of the various phases including RRV or the voids.…”

Section: Computerised Tomography (Ct)mentioning

confidence: 99%

Resin-Rich Volumes (RRV) and the Performance of Fibre-Reinforced Composites: A Review

2022

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This review considers the influence of resin-rich volumes (RRV) on the static and dynamic mechanical and physical behaviour of fibre-reinforced composites. The formation, shape and size, and measurement of RRV in composites, depending upon different fabric architectures and manufacturing processes, is discussed. The majority of studies show a negative effect of RRV on the mechanical behaviour of composite materials. The main factors that cause RRV are (a) the clustering of fibres as bundles in textiles, (b) the stacking sequence, (c) the consolidation characteristics of the reinforcement, (d) the resin flow characteristics as a function of temperature, and (e) the composite manufacturing process and cure cycle. RRV are stress concentrations that lead to a disproportionate decrease in composite strength. Those who are considering moving from autoclave consolidation to out-of-autoclave (OOA) processes should be cautious of the potential effects of this change.

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Section: Computerised Tomography (Ct)mentioning

confidence: 99%

Resin-Rich Volumes (RRV) and the Performance of Fibre-Reinforced Composites: A Review

2022

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“…The capability which μXRCT as a nondestructive imaging technique offers are meanwhile well known in many research domains and it is becoming more and more a routine microscopy technique [8,11,23,24,29,31,45,51,52]. The method is based on the revolutionary discovery of X-ray radiation by Wilhelm Röntgen in 1895 [41].…”

Section: Image-based Characterization Using Xrctmentioning

confidence: 99%

Multi‐scale characterization of granular media by in situ laboratory X‐ray computed tomography

2022

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Investigations of biphasic monodisperse soft (rubber) and stiff (glass) particle mixtures under hydrostatic conditions show an interesting behavior with regard to the effective stiffness. P‐wave modulus measured by acoustic wave propagation at ultrasonic frequencies showed a significant decline while more soft particles are added, that is, higher rubber volume fractions, due to a change in the microstructure of the granular medium. However, for small volume fractions of soft particles, it could be observed that the P‐wave modulus is increasing. This result cannot be explained by classical mixture rules or effective medium theories. For the understanding of those effects, a detailed insight into the microstructure of the granular medium is necessary. To gain this information and link it later back to the measured effective mechanical properties, high‐resolution micro X‐ray computed tomography (μXRCT) imaging is a well‐established tool. With μXRCT imaging, the granular microstructure can be visualized in 3D and characterized subsequently. Combining classical effective characterization methods with μXRCT imaging can help to solve a variety of multi‐scale problems. Performing the characterization step in situ, meaning inside the laboratory‐based μXRCT scanner, has the advantage that exactly the same samples are mechanically characterized and visualized. To address the mentioned observation above, we designed a low X‐ray absorbing oedometer cell with integrated broadband piezoelectric P‐wave transducers which enables this kind of investigation inside a laboratory‐based μXRCT scanner. The focus of this contribution is on the general experimental methodology which can be transferred to other multi‐scale problems. It starts with a description of the image acquisition and ends with the post‐processing of the in situ acquired image data. To demonstrate this, cylindrical samples consisting of the same monodisperse rubber and glass particle mixtures that were studied before under hydrostatic stress conditions are considered. Selected results are presented to explain the single steps.

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“…Existing techniques for the nondestructive testing (NDT) of composite materials [ 6 , 7 , 8 , 9 ] are dedicated to industrial applications with low spatial resolution. Currently, the high spatial resolution needed for studying the microscopic structure of reinforced composites is provided only by techniques such as impulse acoustic microscopy [ 10 , 11 , 12 , 13 ] and X-ray computer microtomography (micro-CT) [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Study of Polymer Composite Destruction in the Early Stages

et al. 2023

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The investigation of destruction processes in composite materials is a current problem for their structural application and the improvement of their functional properties. This work aimed to visualize structural changes induced in layered carbon fiber reinforced plastics (CFRP) with the help of synchrotron X-ray microtomography. This article presents the details of destructive processes in the early stages of the deformation of reinforced polymers under uniaxial stretching, investigated at the micro level. Individual structural elements of the composite–filaments, parallel fiber bundles, the nonuniformity of the polymer binder distribution, and continuity defects–were observed under an external load. We have considered the influence of the material architecture and technological defects on fracture evolution in cross-ply and quasi-isotropic fiber-reinforced plastics. The results indicate the sequence of irreversible structural changes before the destruction of the material.

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A review of applications of CT imaging on fiber reinforced composites

Cited by 26 publications

References 149 publications

Resin-Rich Volumes (RRV) and the Performance of Fibre-Reinforced Composites: A Review

Resin-Rich Volumes (RRV) and the Performance of Fibre-Reinforced Composites: A Review

Multi‐scale characterization of granular media by in situ laboratory X‐ray computed tomography

Three-Dimensional Study of Polymer Composite Destruction in the Early Stages

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