An experimental investigation on the low-velocity impact performance of the CFRP filled with nanoclay

Fakhreddini-Najafabadi, Sajjad; Torabi, Mahdi; Taheri‐Behrooz, Fathollah

doi:10.1016/j.ast.2021.106858

Cited by 32 publications

(12 citation statements)

References 39 publications

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Section: Resultsmentioning

confidence: 99%

“…Sajjad et al reported that delamination mechanisms substantially reduced in NCs filled laminates after LVITs. [ 47 ] Even though the BmCJs represent higher bearing strengths than the neat counterparts for all energy levels, the decrease rate in the strength is equal for both samples as 22% compared to the before impact cases.…”

Section: Resultsmentioning

confidence: 99%

“…Based on Sajjad et al and Vieille et al, incorporation of nano clay to composite was minimized the displacement because the incorporation of nano clay was enhanced the resistance of the nanocomposite against the fiber deform. [47,48] Figure 4 depicts the variation in impact energy over the course of the impact test for various energy levels. In all circumstances, the BmCJs absorb a lower amount of impact energy than the BCJs, as observed.…”

Section: Low-velocity Impact Testsmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Low-velocity Impact Testsmentioning

confidence: 99%

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

Kaybal

2022

Polymer Composites

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“…Nano-filler Researchers CFRP SWCNT Burkov et al, [28] Rawat et al, [29] Yokozeki et al, [30] Vartak et al [31] MWCNT Singer et al, [32] Chou et al, [33] Hu et al, [34] Kumar et al, [35] Pekturk et al [36] Nano-clay Iqbal et al, [37] Fakhreddini-Najafabadi et al, [38] Thakur et al, [39] Al-Safy et al, [40] Ambekar et al, [41] Aboubakr et al [42] Nano-silica Ding et al, [43] Liu et al [44] Graphene Hung et al, [45] Liu et al, [46] Kostagiannakopoulou et al [47] GFRP SWCNT Maghsoudlou et al [48] MWCNT Kassa et al, [49] Özbek et al, [50] Rana et al, [51] Chowdary et al [52] Nano-clay Erkli g et al, [53] Zena et al [54] Nano-silica Özbek et al, [50] Zamani et al, [55] He et al [56] Graphene Shabberhussain et al, [57] Veerakumar et al, [58] Arun et al [59] Kevlar CNT Cao et al, [60] Xiang et al, [61] Sharma et al, [62] LaBarre et al [63] Nano-clay Reis et al, [64] Rahman et al, [65] Vivekanandhan et al [66] Nano-silica Chowdary et al, [52] Alsaadi et al, [67] Gokuldass et al,…”

Section: Composite Materialsmentioning

confidence: 99%

State of the art review on mechanical properties of sandwich composite structures

Patekar

Kale

2022

Polymer Composites

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Sandwich composite structures are widely used in various industries namely, aerospace, automotive, packaging, biomedical, civil and electronics due to their high specific strength and energy absorption capabilities. Mechanical properties of sandwich structure depend on material properties of face sheet and core, and strength of face sheet-core interface. Most commonly used composite materials are carbon fiber reinforced plastics, glass fiber reinforced plastics, ceramic matrix composites, and metal matrix composites. Several researchers have used nano-fillers namely, nano-clay, carbon nanotube, and nano-silica for improvement of mechanical properties of composite structures.In this paper, an extensive literature review has been discussed regarding influence of various material and geometrical parameters on mechanical properties of sandwich composite structure. Initially, influence of various fiber reinforcement and nano-fillers on mechanical properties are discussed. Then, deformation behavior and mechanical properties of honeycomb core is elaborated.Further, influence of temperature variation on composite structure is discussed. Moreover, crucial insights on reviewed literature are presented and future advancements in the field of sandwich composite structure are discussed.

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“…% of nanoclay, the impact force increased by 15.72% and the displacement decreased by 5.26%. Najafabadi et al 8 evaluated the effect of adding nanoclay on the impact response of the carbon fiber reinforced polymers under three impact energy levels of 10 J, 15 J, and 20 J. According to this study, an addition of 0.2 wt.% Cloisite 20A led to a significant increase in the maximum impact force (up to 25.7%) and a decrease in the maximum displacement (up to−29.08%).…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

Tofighi

Biglari

Shokrieh

2022

Journal of Composite Materials

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The low-velocity impact response of sandwich structures with aluminum face sheets and neat or nano-reinforced polypropylene core was studied. A strain-rate dependent micromechanics model (SRDM) was presented in the literature for predicting the dynamic behavior of nano-reinforced polymers. In the present study, the dynamic behavior of nano-reinforced polypropylene was simulated based on SRDM results. The finite element model was validated against the experimental results. It was shown that the results of the simulation performed by the SRDM model were in very good agreement with the experimental data. Then, the proposed finite element model was used for checking the sensitivity of the impact performance of nano-reinforced sandwich structures to the material and geometrical variations. A special sandwich structure with a core of 1 mm thickness and a face thickness of 1 mm was considered as the base structure. Different material and geometrical variations including doubling the thickness of the core or face sheets, a different weight ratio of graphene, and increasing material parameters of the face sheets up to 90%, were undertaken on the base structure. The results of the present study imply that the optimal amount of graphene should not exceed 0.5 wt.% to improve impact properties. The impact response of nano-reinforced sandwich structures was more sensitive to the variations of the face thickness in comparison to the variations of the core thickness. Moreover, the impact outputs were more sensitive to changes in the yield stress of faces compared to changes in Young’s modulus of faces.

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An experimental investigation on the low-velocity impact performance of the CFRP filled with nanoclay

Cited by 32 publications

References 39 publications

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

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

State of the art review on mechanical properties of sandwich composite structures

Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

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