Improving impact resistance and residual compressive strength of carbon fibre composites using un-bonded non-woven short aramid fibre veil

Yuan, Bingyan; Tan, Bo; Hu, Yuxia; Shaw, Jeremy; Hu, Xiaozhi

doi:10.1016/j.compositesa.2019.04.006

Cited by 73 publications

(33 citation statements)

References 47 publications

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“…It should be mentioned that the interleave concept using micro-length or short fiber has been tested as early as 1994 [12]. Furthermore, the concept has been extended from the mid-layer (research only) to multiple layered reinforcement (practical pre-preg applications) [17,19].…”

Section: Introductionmentioning

confidence: 99%

Interlaminar toughening in structural carbon fiber/epoxy composites interleaved with carbon nanotube veils

González

Vilatela

2019

Composites Part A: Applied Science and Manufacturing

143

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The susceptibility to delamination is one of the main concerns in fiber reinforced polymer composites (FRPs). This work demonstrates improvements of 60% in Mode-I fracture toughness after integration of thin (~30 micron), continuous veils of carbon nanotubes (CNTs) directly deposited onto carbon fiber fabric as the CNT are drawn from the gas-phase using a semi-industrial process. A combination of optical imaging, scanning electron microscopy and a Raman spectroscopy provide a new rapid tool to unambiguously determine the crack propagation path by simple visual inspection of fracture surface. The results show that interlaminar crossing between CNT veil/CF interfaces is of paramount importance. The crack front alternatingly propagates above and below the CNT-toughened interlayer, significantly improving the fracture toughness of resultant laminates. This mechanism is strongly influenced by the method used to integrate the veils onto the CF. CNT veils directly deposited onto the fabrics as a low-density layer lead to large improvements in interlaminar properties, whereas compact CNT veils densified by solvent exposure prior to their integration in the lay-up act as defects.

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Section: Introductionmentioning

confidence: 99%

Interlaminar toughening in structural carbon fiber/epoxy composites interleaved with carbon nanotube veils

González

Vilatela

2019

Composites Part A: Applied Science and Manufacturing

143

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“…Similarly, deformation height ( h d ) was reduced from 8.0 mm for control specimen to 5.0, 5.0, and 3.0 mm thus yielding 37.5%, 37.5%, and 62.5% decrease for L3, L2, and L1 specimens, respectively. The L1 laminate exhibited least surface damage area (Figure 6) and damage degree (Table 3) due to its enhanced resistance to delamination, limited propagation in the surrounding region 50 (as evidenced by Figure 7(b)) and easy stress transfer between the carbon fabric plies. This effect can be associated to the bridging mechanism of nonwoven interleaves thus contributing to its less structural damage and reduced out‐of‐plane deformation.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 10 compares the failure modes of control and L1 laminates during CAI test at impact energy of 40 J. The L1 laminate, having nonwoven interleaves in alternating sequence, presented the better CAI performance, which may be reasoned to its reduced structural damage after LVI, more uniform distribution of compressive load, more effective crack‐bridging and inhibition of delamination propagation between carbon plies as compared to control laminate 50 …”

Section: Resultsmentioning

confidence: 99%

Enhanced interlaminar shear and impact performance of woven carbon/epoxy composites interleaved with needle punched high performance polyethylene fiber nonwoven

Jabbar

Ahmad

Adnan

et al. 2021

J of Applied Polymer Sci

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In this study, high-performance polyethylene (HPPE) fiber-based needle punched nonwovens were interleaved in cross-plied woven carbon fabric/epoxy composite laminates to enhance their interlaminar and impact properties. The placement of needle punched nonwoven interleaves exhibited considerable enhancement in interlaminar shear strength (ILSS), impact damage tolerance, and compression after impact (CAI) strength of laminates as evidenced by higher interlaminar strength, less absorbed energy, higher elastic energy, reduced damage degree, reduced out-of-plane deformation, higher loadbearing capacity, and higher residual compressive strength as compared to control sample. In particular, the composite laminate with placement of interleaves in alternating sequence between carbon plies resulted in 205.76% increase in ILSS and 129, 103 and 85% increase in CAI at 10, 25, and 40 J impact energy, respectively. Moreover, damaged surface area and out-of-plane deformation reduced to 38.75% and 62.5%, respectively for the same specimen impacted at 40 J energy. These results suggest that the HPPE fiber-based needle punched nonwoven interleaving can be adopted as a simple and low-cost approach compared with other interleaving techniques, to enhance the resistance to delamination, impact performance, and damage tolerance of traditional structural laminates.

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“…There are several effective methods to develop toughening composites, such as z-pinning, stitching, interleaving, 3D weaving, and so on. [13,14] A study conducted by Ravindran et al investigated an effective way to toughen composites by combining carbon nanofillers and z-pinning. The results revealed that 1D nanofillers induced synergistic improvements on the interlaminar fracture toughness of z-pinning, whereas the 2D nanofillers had virtually no use.…”

Section: Introductionmentioning

confidence: 99%

Investigation of toughening effect of biomass‐derived SiCB on basalt fiber‐reinforced unsaturated polyester composites

2020

Polymer Composites

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Fiber-reinforced polymer composites are outstanding lightweight structural materials, so that they are widely used in automotive, marine, medical, defense, and aerospace fields. However, when subjected to structural loads, they are prone to failure due to their inherent brittleness and the susceptibility to delamination, which can lead to the loss of the load-bearing capacity of composite materials. This article proposes an effective solution of innovatively using the silicon carbon black, a kind of sustainable green biomass material derived from rice husks, to toughen the composites. When the content of silicon carbon black (SiCB) added to the composites is 1.5 wt%, the maximum values of flexural strength, bending energy absorption, and the mode II interlaminar fracture toughness values are 333 MPa, 6.10 J, and 1591 J/m 2 , respectively, corresponding to the improvement percentage of 138%, 120%, and 216%. The addition of SiCB significantly improved the bending properties and the mode II interlaminar fracture toughness of composites. The toughening mechanisms of SiCB were studied based on the fracture surface morphologies of the composites.

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Improving impact resistance and residual compressive strength of carbon fibre composites using un-bonded non-woven short aramid fibre veil

Cited by 73 publications

References 47 publications

Interlaminar toughening in structural carbon fiber/epoxy composites interleaved with carbon nanotube veils

Interlaminar toughening in structural carbon fiber/epoxy composites interleaved with carbon nanotube veils

Enhanced interlaminar shear and impact performance of woven carbon/epoxy composites interleaved with needle punched high performance polyethylene fiber nonwoven

Investigation of toughening effect of biomass‐derived SiCB on basalt fiber‐reinforced unsaturated polyester composites

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