In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension

Wang, Yanlei; Wang, Yongshuai; Han, Baoguo; Wan, Baolin; Cai, Gaochuang; Chang, Ruijuan

doi:10.3390/polym10070777

Cited by 20 publications

(12 citation statements)

References 37 publications

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“…Although this material has a diameter that is several orders greater than that of CNTs, the high length-todiameter ratio which is a common feature that they share makes both of them a promising filler particle for continuous conducting network. Wang, Y., et al performed both static and cyclic tensile test on a carbon nanofiber embedded GFRP with a nanofiber content of 0.86 wt.%, and demonstrated the in-situ strain and damage monitoring capability of this material [133].…”

Section: 23) Other Conductive Fillersmentioning

confidence: 99%

Damage detection of composite materials via electrical resistance measurement and IR thermography: A review

Ryu¹

2021

Preprint

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Composite materials, composed of multiple constituent materials with dissimilar properties, are actively adopted in a wide range of industrial sectors due to their remarkable strength-to-weight and stiffness-to-weight ratio. Nevertheless, the failure mechanism of composite materials is highly complicated due to their sophisticated microstructure, making it much harder to predict their residual material lives in real life applications. A promising solution for this safety issue is structural damage detection. In the present paper, damage detection of composite material via electrical resistance-based technique and infrared thermography is reviewed. The operating principles of the two damage detection methodologies are introduced, and some research advances of each techniques are covered. The development of IR thermography-based NDT including optical thermography, laser thermography and eddy current thermography will be reported, as well as the electrical impedance tomography (EIT) which is a technology increasingly drawing attentions in the field of electrical resistance-based damage detection. A brief comparison of the two methodologies based on each of their strengths and limitations is carried out, and a recent research update regarding the coupling of the two techniques for improved damage detection in composite materials will be discussed.

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Section: 23) Other Conductive Fillersmentioning

confidence: 99%

Damage detection of composite materials via electrical resistance measurement and IR thermography: A review

Ryu¹

2021

Preprint

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“…However, in case of plastic deformation, the re‐formation of the conductive pathways is prevented and a subsequent strong increase in resistance due to damage accumulation occurs. [ 6,59 ]…”

Section: Introductionmentioning

confidence: 99%

“…However, in case of plastic deformation, the re-formation of the conductive pathways is prevented and a subsequent strong increase in resistance due to damage accumulation occurs. [6,59] Fatigue loading is a repeated loading condition and causes dynamic growth of damage mechanisms under Nanoparticle modified fiber reinforced composites are inherently multiscale structures which consist of fiber and matrix phases on macro scale and fiber-matrix and nanoparticle-matrix interphase on micro scale so that understanding the fatigue behavior of composites requires detailed investigation considering the type of constitutive materials as well as the interphase region. In other words, damage accumulation of composite structures depends on the characteristics of both macro scale and multi scale properties.…”

Section: Introductionmentioning

confidence: 99%

A statistical approach to predict fatigue failure of leaf springs manufactured with nanotube incorporated epoxy‐woven glass fiber composites

et al. 2023

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In this study, a statistical approach was developed to predict fatigue failure of laminated composite leaf springs prepared with carbon nanotube (CNT) filled epoxy/woven glass fibers. Electrical resistance change method and the Weibull analysis were adopted to develop a statistical approach. The electrical conductivity for successful application of health monitoring of leaf springs was achieved by dispersing 0.4 wt% of CNTs into epoxy resin. In-situ monitoring of damage in composite leaf springs during fatigue tests applied as cyclic flexural deflection was carried out at nine different displacement ratios. The critical fatigue cycle and the corresponding change in electrical resistance were determined at each displacement ratio. Then, the critical electrical resistance change to cyclic fatigue was found 0.15% with 95% reliability by the Weibull analysis. The average fatigue life and the average strength loss corresponding to the 0.15% resistance change ratio were found to be 48.33% and 9.88%, respectively. The reported statistical concept based on the monitoring of change in electrical resistance during deflection can be successfully employed as a useful tool to predict safety limits of composite structures subjected to fatigue loading, especially in aerospace industry.

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“…For this purpose, polymer composites have been investigated as an alternative bumper system material. The importance of using polymer composites in the automotive industry is their high specific modulus and strength, good thermal stability, durability, stiffness, flexural properties, impact strength, corrosion resistance, and good formability [ 15 , 16 , 17 ]. In studying the composite materials, special attention has been paid to hybrid composites [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Polymer Composites and Memory Foam on Energy Absorption in Vehicle Application

et al. 2020

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The automotive industry is one of the biggest consumers of polymer composites. Aside from good mechanical properties, polymer composites have low mass, which positively affects the overall vehicle weight reduction and improves energy efficiency. Although polymer composites are used in various vehicle components, this paper focused on the application in vehicle bumper production. Two different composite plates with hybrid fiber layup were made; the first plate with a combination of glass and carbon fibers and the second with carbon and aramid. For comparison, and as a cheaper variant, a third plate was made only with glass fibers. In the first two plates, epoxy resin was used as the matrix, while in the third plate, polyester resin was used. Polyurethane memory foams of different densities (60, 80, 100 kg/m3) and thicknesses (10, 15, 20 mm) were used as impact force energy absorbers. With the factorial design of experiments, it was found that the thickness of the memory foam was the main influence factor. Without the use of memory foam, the hybrid composite, made of glass and carbon fibers, showed the highest energy absorption, while with the use of foam, the highest energy absorption was achieved with the glass fiber composite. Without the memory foam, the impact force measured on the glass/carbon hybrid composite was 9319.11 ± 93.18 N. Minimum impact force to the amount of 5143.19 ± 237.65 N was measured when the glass fiber composite plate was combined with the memory foam. When using memory foam, the impact force was reduced by 30–48%, depending on the type of composite used.

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In Situ Strain and Damage Monitoring of GFRP Laminates Incorporating Carbon Nanofibers under Tension

Cited by 20 publications

References 37 publications

Damage detection of composite materials via electrical resistance measurement and IR thermography: A review

Damage detection of composite materials via electrical resistance measurement and IR thermography: A review

A statistical approach to predict fatigue failure of leaf springs manufactured with nanotube incorporated epoxy‐woven glass fiber composites

Influence of Polymer Composites and Memory Foam on Energy Absorption in Vehicle Application

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