Review of in-process defect monitoring for automated tape laying

Yadav, Neha; Schledjewski, Ralf

doi:10.1016/j.compositesa.2023.107654

Cited by 9 publications

(5 citation statements)

References 102 publications

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“…To evaluate the similarity between sub-regions in the left and right images, the criterion used to determine the optimal initial point employs the zero-mean normalized cross-correlation function (ZNCC), as illustrated in equation (5).…”

Section: Search Estimation Based On Epipolar Constraintsmentioning

confidence: 99%

“…Currently, both domestic and international research has been conducted on various fiber bundle measurement techniques, primarily categorized into contact and non-contact methods [4]. Among contact measurement approaches, some scholars have proposed angle protractor methods for measuring the winding angle of composite fiber winding products [5]. However, these methods lack real-time detection capability and are unsuitable for application in production processes.…”

Section: Introductionmentioning

confidence: 99%

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A target-free stereo matching method of 3D vision-based for measuring composite fiber bundles

He,

Lv,

Xiao

et al. 2024

Third International Conference on Testing Technology and Automation Engineering (TTAE 2023)

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The trajectory detection of composite fiber bundles holds significant importance for mechanical performance analysis and process parameter control. However, during the fiber bundle forming process, its surface presents challenges for existing detection techniques due to being difficult to access, having weak textural features, and exhibiting local high reflectivity characteristics. Addressing these issues, this paper proposes a novel measurement method based on 3D vision reconstruction technology to achieve high-precision measurement of fiber bundle trajectories in a non-contact manner. In this method, a "coarse to fine" stereo-matching strategy is introduced. Leveraging the constraints of binocular views, an initial matching strategy tailored for weak textural features is established. Furthermore, based on the locally obtained subarea images from the initial matches, a multi-directional fusion of feature enhancement and local stereo matching using deformation optical flow is proposed, enabling higher precision in 3D visual measurement. Through experimental verification using the composite shell winding process, the proposed method is demonstrated to efficiently and accurately capture the trajectories and winding angles of fiber bundles.

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Section: Search Estimation Based On Epipolar Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A target-free stereo matching method of 3D vision-based for measuring composite fiber bundles

He,

Lv,

Xiao

et al. 2024

Third International Conference on Testing Technology and Automation Engineering (TTAE 2023)

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“…To further research the randomness in fabrics, this investigation will use different fibre angles in ATL. Previous alignment studies show a linear correlation between the fibre alignment and the flexural strength [15,24]. Manufacturing defects, leading to fibre misalignment, are highlighted by Alam et al [25] as being the primary cause of data scattering in CFRP.…”

Section: Introductionmentioning

confidence: 97%

“…Using typical prepregs in the Fill Multilayer causes issues with adhesion in the rollers; this is mitigated with zero-tack prepregs. In comparison with previous ATL machines (e.g., those described in [15,16]), ultrasonic welding of the prepregs or dry fabrics is used to prevent tow shifting. Ultrasonic welding is employed to adhere plies together in a novel approach using the Fill Multilayer to adhere zero-tack resin prepregs.…”

Section: Introductionmentioning

confidence: 99%

Stiffness Retention in Cyclic-Loaded CFRP Composites Produced via Novel Automatic Tape Laying

Blythe,

Fox,

Nikzad

et al. 2024

J. Compos. Sci.

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Sixteen-head automatic tape laying of non-crimped carbon-fibre-reinforced plastic is performed, and the fibre alignment is compared with that produced via hand laying. The effect of fibre alignment is tested via quasi-static and cyclic three-point bending tests. Using the Fill Multilayer (a 16-head tape-laying machine), precision fibre laying of unidirectional fabrics is performed with deliberate misalignment to examine the effect of fibre orientation and investigate the random effect on longitudinal misalignment. The automatic tape-layered coupons are compared with hand-layered carbon fibre tapes to investigate the relationship between the fibre alignment and the flexural strength. A 52% reduction in the fibre alignment scatter is achieved via the Fill Multilayer. Fibre orientation increases lead to a higher flexural strength of 16.08% for Fill Multilayer-made coupons compared with hand-layered samples. An investigation of the correlation between fibre alignment and flexural strength shows that shear-based failure increases exponentially as the alignment decreases. Fill Multilayer-made coupons have a higher void concentration due to ultrasonic welding, but also the highest modulus and flexural strength, as fibre misalignment is reduced to 1.68°, with a modulus degradation of 1.4%.

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“…Continuous fiber reinforced composites are widely applied in aerospace industry, mechanical engineering, shipbuilding and wind power sector due to the combination of high performance and light weigh 1 .While the density of aluminum alloys is about 2.6-2.8 g/cm 3 , the density of composites range from 1.5 through 2.0 g/cm 3 depending on the type of fiber and the matrix material.…”

Section: Introductionmentioning

confidence: 99%

Impregnation modelling of the pultruded continuous fiber reinforced UD-prepregs

Kalish,

Fomicheva,

Malakho

et al. 2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

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The efficiency of fiber impregnation with a polymer melt is one of the most important components that make up the quality of the UD-prepregs and, subsequently, parts made of them. If thoroughly formulated, the mathematical impregnation model could assist to find the most suitable parameters to enhance the impregnation. Consequently, the investigation of the fiber bundle impregnation with the high-viscosity thermoplastic resin melt by pultrusion with impregnation die is represented. An approximate one-dimensional mathematical model of roving impregnation during pultrusion through an impregnation die which considers the polymer melt leakage into fiber bundle is established. The maximum total impregnation depth of fiber bundle depending on the various values of the pulling speed and the fiber tension is calculated. The results show that the calculations of the impregnation depth are hinge on the leakage consideration, as well as on pulling speed and tension.

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Review of in-process defect monitoring for automated tape laying

Cited by 9 publications

References 102 publications

A target-free stereo matching method of 3D vision-based for measuring composite fiber bundles

A target-free stereo matching method of 3D vision-based for measuring composite fiber bundles

Stiffness Retention in Cyclic-Loaded CFRP Composites Produced via Novel Automatic Tape Laying

Impregnation modelling of the pultruded continuous fiber reinforced UD-prepregs

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