Characterization of multi‐stitched woven nano composites under compression after low velocity impact (CALVI) load

Bilişik, Kadir

doi:10.1002/pc.24406

Cited by 10 publications

(7 citation statements)

References 45 publications

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“…Stitching can be made by sewing machine. The lock stitching is generally used in stitched preform fabrication for composites [53,54]. Advances in Glass Science and Technology 3D orthogonal woven fabric has three yarn sets as warp, weft, and z-yarn (Figure 10(a)).…”

Section: Three Dimensional (3d) Fabricsmentioning

confidence: 99%

Applications of Glass Fibers in 3D Preform Composites

Bilişik¹,

Kaya²,

Özdemir³

et al. 2018

Advances in Glass Science and Technology

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E-glass three dimensional (3D) stitched preform composites have been developed for several industrial applications due to their high mechanical performance and damage tolerance properties. Although some in-plane properties of the stitched E-glass composite structure are slightly lower than in laminated composite, its mode-I delamination failure is improved. This was achieved by using the out-of-plane directional stitched fibers. Recently, some nanoparticles as single-walled nanotubes (SWNT) or multiwalled nanotubes (MWNT) or nanofibers (NF) were added to the glass fabric structure or stitched preform during consolidation process. This further enhances the thermo-mechanical impact properties of the E-glass fiber composites.

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Section: Three Dimensional (3d) Fabricsmentioning

confidence: 99%

Applications of Glass Fibers in 3D Preform Composites

Bilişik¹,

Kaya²,

Özdemir³

et al. 2018

Advances in Glass Science and Technology

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“…Although nanofillers improve the impact resistance of composites, they exhibit the drawbacks of high agglomeration tendency and increased resin viscosity. [13] Other strategies such as three-dimensional (3D) weaving, [14] Z-pinning, [15] and through-thickness stitching [16,17] also provide targeted reinforcement of the interlaminar region. These methods enhance the through-thickness properties, but may compromise the in-plane mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies on low‐velocity impact damage of composite laminates toughened by nickel‐coated carbon fiber veil

Liu

Guo

et al. 2022

Polymer Composites

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The low‐velocity impact response of carbon fiber composite laminates toughened by nickel‐coated carbon fiber (NiCF) veil interleaves was investigated experimentally and numerically. The experimental results indicated that the impact resistance of laminates with a layer of NiCF veil of 34 g/m2 inserted in the midplane was improved, especially in terms of increased peak impact force and residual compressive strength (by 16.15%), and reduced damage area (by 30.92%). The enhancement mechanisms were attributed to the breakage, pull‐out, and crack bridging of the NiCF veil, as well as the peeling of nickel coating, which enhanced the carbon fiber/resin interfacial adhesion. A numerical model based on continuum damage mechanics and cohesive zone model was developed and its validity was verified. The simulation results confirmed that NiCF veils reduced energy absorption by enhancing the interlaminar properties of laminates, thereby reducing impact damage. Moreover, laminates with higher areal density and more layers of NiCF veils had higher impact force and smaller damage area, and thus had better impact resistance.

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“…[ 12,15 ] Moreover, the effects of these factors on the damage tolerance of FRPs were intensively investigated by tensile, compression, and flexural tests after the impact test. [ 16,17 ] Even though BCJs can expose to impact damages with similar scenarios of FRPs, no single study exists dealing with the bearing performance of the BCJs after impact loading up to now (bearing‐after‐impact). Research on the subject has been mostly restricted to limited comparisons of the bolted FRP joints' shear, bearing, and tensile performances.…”

Section: Introductionmentioning

confidence: 99%

Assessment of damage tolerance of bolted composite structures via “bearing‐after‐impact” tests

Kaybal

2022

Polymer Composites

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Although bolted composite joints are mainly designed to resist bearing loading, dynamic loading such as low‐velocity impact can also be a severe threat because of its potential to reduce joint reliability. Surprisingly, it is still unclear how bolted composite joints perform after the dynamic loading, and its effect on the damage tolerance is unknown likewise. This study aims to evaluate experimentally the bearing‐after‐impact (BAI) damage tolerance of bolted glass‐fiber (GF) reinforced epoxy composite joints. For this, the GF/epoxy composite laminates were assembled in single‐lap shear joints firstly, and the bolted composite joints were subjected to low‐velocity impact tests at various energy levels from 3 to 10 J. Following that, standardized bearing tests were carried out to determine the damage tolerance of the laminated composites following the impact. Nanoclay fillers were also added to the epoxy matrix to improve damage tolerance. After the low‐velocity impact loading, the bearing strength diminishes by almost 22% for the bolted composite joints, while the reduction in damage tolerance is effectively limited with the nanoclay addition. However, as the impact energy increases, the efficiency of the nanofiller declines. Increased impact energy results in changes in failure modes, and nanofillers improve damage tolerance with additional nano‐scale toughness‐increasing mechanisms.

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Characterization of multi‐stitched woven nano composites under compression after low velocity impact (CALVI) load

Cited by 10 publications

References 45 publications

Applications of Glass Fibers in 3D Preform Composites

Applications of Glass Fibers in 3D Preform Composites

Experimental and numerical studies on low‐velocity impact damage of composite laminates toughened by nickel‐coated carbon fiber veil

Assessment of damage tolerance of bolted composite structures via “bearing‐after‐impact” tests

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