Interlaminar Fracture Behavior of Carbon Fiber/Polyimide Composites Toughened by Interleaving Thermoplastic Polyimide Fiber Veils

Lan, Bangwei; Liu, Yi; Song, Mo; He, Meng; Zhai, Lihong; Fan, Lin

doi:10.3390/ma14102695

Cited by 11 publications

(4 citation statements)

References 47 publications

(48 reference statements)

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“…It was also reported that thanks to the hybrid structure, the crack is mostly trapped by the veil, which prevents the crack from absorbing more energy and growing. In another study, Lan et al 19 examined the interlaminar fracture response by placing thermoplastic polyimide (TPPI) veils with various areal densities (5–15 gsm) produced by electrospinning between CF plates. In this respect, Mod‐I and Mod‐II tests were carried out, and it was discovered that there was a considerable improvement in fracture toughness as the areal density increased from 5 to 15 gsm.…”

Section: Introductionmentioning

confidence: 99%

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The influences of low‐velocity impact loading on the vibration responses of the carbon/glass fiber‐reinforced epoxy composites interleaved with various non‐woven thermoplastic veils

Tarih

Coskun

Yar

et al. 2023

J of Applied Polymer Sci

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Time‐dependent variable stresses that occur in composites subjected to mechanical and dynamic loads have devastating impacts on the material properties. Since these stresses reduce the service life, it is critical to detect and enhance structural responses before and after dynamic loadings. Therefore, the present study aimed to increase the toughness and delamination resistance of the conventional fiber‐reinforced composites by means of thermoplastic veil interleaves, thereby improving the vibration responses both before and after low‐velocity impact (LVI). In this context, carbon fiber (CF) and glass fiber (GF) reinforced epoxy composites interleaved with five different thermoplastic veils as Polyamide (PA), Polyetheretherketone (PEEK), Polyetherimide (PEI), Polyimide (PI) and Poly‐Phenylene Sulphide (PPS) were manufactured, and machined in accordance with the LVI standard. Composite specimens were subjected to the LVI tests, and then vibration tests were carried out for the non‐impacted and impacted specimens to determine dynamic properties. As a result, although thermoplastic veils generally have favorable effects on damping ratios of the GF composites, it has been revealed that these veils other than PPS and PI cause deterioration in CF composites. On the other hand, since vibration reduction depends on inherent damping and structural stiffness, this study also examined the storage‐to‐loss modulus ratios which denote the loss factors. In this respect, it was discovered that, while PPS, PEEK, PA, and PI thermoplastic veils included among the GF laminates ascend the loss factors of composites, only PI and PPS thermoplastic veils were shown to be positively effective in CF laminates. Moreover, CF and GF reinforced composites interleaved with thermoplastic veils generally exhibited higher natural frequency and lower damping ratio compared to the entirely CF or GF laminated composites. These results show that composite specimens gained bending stiffness due to local deformation hardening, and improved dynamic properties thanks to thermoplastic veil interleaved was attributed to increased toughness and delamination resistance.

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Section: Introductionmentioning

confidence: 99%

“…This was linked to the chemical nature of thermoplastic materials and interpreted as chain slippages in thermoplastics improving energy absorption capacity 44. The macro-scale damage mechanisms for the CFRP and GFRP composites interleaved with PA, PEEK, PEI, PI and PPS thermoplastic veils are shown inFigures 16,17,18,19,20,and 21. For the examination of damage…”

mentioning

confidence: 99%

The influences of low‐velocity impact loading on the vibration responses of the carbon/glass fiber‐reinforced epoxy composites interleaved with various non‐woven thermoplastic veils

Tarih

Coskun

Yar

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The main methods for achieving interlayer reinforcement include oxidation treatment [12,13], matrix toughening [14,15], Z-pinning (a technique to insert reinforcing fibers along the Z-direction of continuous-fiber-reinforced plastics) [16], and nanoparticle treatment [17,18]. Due to the demand for improved anti-delamination properties without affecting in-plane stiffness and strength, the use of nanoreinforcement particles (such as TiO 2 /Al 2 O 3 [19], nanosilica [20,21], and nanofiber materials such as CNTs) to modify CFRP composites has been widely studied by researchers.…”

Section: Introductionmentioning

confidence: 99%

Interlaminar Properties of Prepregs Reinforced with Multiwalled Carbon Nanotubes/Graphene Oxide

Wen

Shen

Chen³

2023

Materials

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Carbon-fiber-reinforced polymer (CFRP) composites are widely used in industries such as aerospace due to their lightweight nature and high strength. However, weak interfacial bonding strength is one of the main problems of resin-based composites. In this study, a prepreg was prepared by melt mixing. By dispersing nanoreinforcement particles in the resin, the interlaminar shear strength of the CFRP was increased by approximately 23.6%. When only 0.5 wt% multiwalled carbon nanotube (MWCNT) was used for reinforcement, scanning electron microscopy (SEM) micrographs showed that cracks were hindered by the MWCNTs during propagation, causing crack deflection. At the same time, the mechanism of MWCNTs pulling out increased the energy required for crack propagation. When only 0.5 wt% graphene oxide (GO) was added, the reinforcement effect was inferior to that of using the same amount of MWCNTs. The laminar structure formed by GO and the resin matrix adhered to the carbon fiber surface, reducing the degree of destruction of the resin matrix, but its hindering effect on crack propagation was weak. When 0.5 wt% of MWCNT and GO mixture was added, the interlayer shear strength increased from 55.6 MPa in the blank group to 68.7 MPa. The laminar structure of GO provided a platform for the MWCNTs to form a mesh structure inside its matrix. At the same time, the tubular structure of the MWCNTs inhibited the stacking of GO, providing better dispersion and forming a synergistic enhancement effect.

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“…Their results showed that the electrical volume conductivity increased more than 200% with the MWCNT/coPA MB fiber mat interleaving, while composite laminae storage modulus decreased. Lan et al [ 18 ] developed heat‐resistant and durable carbon fiber‐reinforced polyimide composites interleaved with thermoplastic polyimide (TPPI) fiber mat. They reported that TPPI fiber mat interleaving (tested at 250°C) enhanced the mode I and mode II fracture toughness of composite laminates over 200% compared to the non‐interleaved one.…”

Section: Introductionmentioning

confidence: 99%

Development of single‐polypropylene composites interleaved with MWCNT‐doped melt‐blown fine fiber mats

Kara

Molnár

2022

Polymer Composites

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In this article, we demonstrate fabricating polypropylene (PP)/multiwalled carbon nanotube (MWCNT) nanocomposite fiber veils and use them as interleaves in single-polymer composites (SPCs) to enhance their thermal and mechanical properties. With this regard, we produced a hierarchical composite structure made of a film, a woven fabric and a fine fiber mat made of the same polymer. The nanocomposite fiber mats were generated by melt-blowing.Results implied that incorporating MWCNT increased the viscosity of the melt blowing grade PP resin. Increasing MWCNT content increased the average fiber diameter and pore size by 2.1-fold and 2.5-fold, respectively. Incorporating MWCNT enhanced the melt-blown (MB) fiber mat's specific strength by 78% and improved the thermal stability. We generated multiscale SPCs by film-stacking, for which we applied a PP film as a matrix, a PP-woven fabric as the primary reinforcement, and the MB fiber mats as interleaves. The SPC's tensile modulus was improved by 37% by the interleaving. Our findings implied that the MWCNT-doped PP fiber mat interleaving provides a robust interfacial adhesion and higher damage tolerance under tensile load. Master curves were constructed from dynamic mechanical analysis frequency sweep tests based on the time-temperature superposition principle. The storage modulus increased by 33%, while the tanδ decreased around 10% with PP/MWCNT fiber mat interleaving. The developed multiscale SPC with MWCNT fiber mat interleaving veils may be easily integrated into engineering composite applications due to its cost-efficiency, fair recycling, straightforward processing, enhanced stiffness, and interfacial adhesion.

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Interlaminar Fracture Behavior of Carbon Fiber/Polyimide Composites Toughened by Interleaving Thermoplastic Polyimide Fiber Veils

Cited by 11 publications

References 47 publications

The influences of low‐velocity impact loading on the vibration responses of the carbon/glass fiber‐reinforced epoxy composites interleaved with various non‐woven thermoplastic veils

The influences of low‐velocity impact loading on the vibration responses of the carbon/glass fiber‐reinforced epoxy composites interleaved with various non‐woven thermoplastic veils

Interlaminar Properties of Prepregs Reinforced with Multiwalled Carbon Nanotubes/Graphene Oxide

Development of single‐polypropylene composites interleaved with MWCNT‐doped melt‐blown fine fiber mats

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