Hygro effects on the low-velocity impact behavior of unidirectional CFRP composite plates for aircraft applications

Ahmad, Furqan; Hong, Jung‐Wuk; Choi, Heung Soap; Park, Myung Kyun

doi:10.1016/j.compstruct.2015.09.040

Cited by 59 publications

(17 citation statements)

References 20 publications

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“…Lu et al [21] investigated the impact behavior of unidirectional CF-reinforced epoxy resin compounds after hydrothermal aging and found that the entry of water molecules decreased the impact resistance of CF/PC compounds. Ahmad et al [22] concluded that the water molecules have a negative effect on the impact resistance of composite plate. Hanan et al [23] found the impact damage for CF/PC composite was influenced by hydrothermal aging via ultrasonic technology.…”

Section: Introductionmentioning

confidence: 99%

Effects of Hydrothermal Aging of Carbon Fiber Reinforced Polycarbonate Composites on Mechanical Performance and Sand Erosion Resistance

et al. 2020

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Carbon fiber reinforced polycarbonate (CF/PC) composites have attracted attention for their excellent performances. However, their performances are greatly affected by environmental factors. In this work, the composites were exposed to hydrothermal aging to investigate the effects of a hot and humid environment. The mechanical properties of CF/PC composites with different aging times (0, 7, 14, 21, 28, 35, and 42 days) were analyzed. It was demonstrated that the storage modulus of CF/PC composites with hot water aged for seven days has the highest value in this sampling period and frequency. Through the solid particle erosion experiment, it was found that the hydrothermal aging causes the deviation of the maximum erosion angle of composites, indicating the composites underwent ductile–brittle transformation. Furthermore, the crack and cavity resulting from the absorption of water was observed via the scanning electron microscope (SEM). This suggested that the hydrothermal aging leads to the plasticization and degradation of CF/PC composites, resulting in a reduction of corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

Effects of Hydrothermal Aging of Carbon Fiber Reinforced Polycarbonate Composites on Mechanical Performance and Sand Erosion Resistance

et al. 2020

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“…Low energy impact response of fiber-reinforced composites has been reported in different studies [12,13]. Some studies were particularly interested in the influence of processing parameters, as temperature [14], or of composite structure, as voids and moisture that strongly affect their impact behaviour [15]. It has been reported that damage development is influenced by the shape and the weight of the impactor [16], and by the impact energy [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Influence of the stacking sequence on the low-energy impact resistance of flax/PA11 composite

Lebaupin

Hoang

Chauvin

et al. 2019

Journal of Composite Materials

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In this paper, the low-energy impact behavior of a fully biobased composite made of bio-sourced polyamide 11 resin reinforced with flax fibers was investigated. Different composite laminates were studied in order to determine the stacking sequence effects on the impact behavior of these composites. Four stacking sequences were manufactured: unidirectional [0°]8, cross-ply [0°/90°]2s, sandwich-like [02°/902°]s and quasi-isotropic [45°/0/−45°/90°]s. A low impact energy of 3.6 J was applied on these laminates by means of a drop weight impact tower. The impact properties of these lay-ups were ascertained by analysing the impact load history, the maximal displacement of the impactor and the absorbed energy. Damage after impact was further assessed by visual inspections, topographic measurements, C-scan and X-ray micro-tomography observations. The results show that impact damage of composite plates is highly influenced by fiber orientation. The impact test data are in good agreement with damage analysis after impact and indicate that stacking plies in the same orientation lead to a larger induced damage, which is responsible for energy dissipation. The quasi-isotropic composite has the smallest induced damage and the highest peak load. Otherwise, the sandwich-like sequence shows the lowest peak load, the highest energy absorption and significant induced damage. Therefore, it is necessary to choose the most suitable lay-up, in terms of impact behavior, for each considered industrial application.

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“…For example, in Boeing 787 aircraft, 43% of metal structures were replaced by CFRP laminates such as fuselage, wing, etc. [1]. Therefore, a suitable failure predictive approach to design the steel/composite bonded joints is necessary.…”

Section: Introductionmentioning

confidence: 99%

Failure Assessment of Steel/CFRP Double Strap Joints

Majidi

Razavi

Berto

2017

Metals

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In the current study, the failure behavior of retrofitted steel structures was studied experimentally and theoretically with steel/carbon fiber reinforced polymer (CFRP) double strap joints (DSJs) under quasi-static tensile loading. A series of DSJs with different bonding lengths are also considered and examined to experimentally assess the effective bond length. To predict the failure load values of the tested specimens, a new stress-based method, namely the point stress (PS) method is proposed. Although some theoretical predictive modelling for the strength between steel/CFRP joints under various loading conditions has been presented, in this work by using the new proposed approach, one can calculate rapidly and conveniently the failure loads of the steel/CFRP specimens. Furthermore, to assess the validity of the new proposed method, further experimental data on steel/CFRP DSJs available in the open literature are predicted using the PS method. Finally, it was found that a good agreement exists between the experimental results and the theoretical predictions based on the PS method.

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Hygro effects on the low-velocity impact behavior of unidirectional CFRP composite plates for aircraft applications

Cited by 59 publications

References 20 publications

Effects of Hydrothermal Aging of Carbon Fiber Reinforced Polycarbonate Composites on Mechanical Performance and Sand Erosion Resistance

Effects of Hydrothermal Aging of Carbon Fiber Reinforced Polycarbonate Composites on Mechanical Performance and Sand Erosion Resistance

Influence of the stacking sequence on the low-energy impact resistance of flax/PA11 composite

Failure Assessment of Steel/CFRP Double Strap Joints

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