Low velocity impact and compressive response after impact of thin carbon fiber composite panels

Seamone, Andrew; Davidson, Paul; Waas, Anthony M.; Ranatunga, Vipul

doi:10.1016/j.ijsolstr.2022.111604

Cited by 26 publications

(4 citation statements)

References 41 publications

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“…Then, with the increase in loading, the strain concentration phenomenon also appears around the central damage region of the specimens impacted by 30 and 40 J; meanwhile, the concentrated stain develops along the direction perpendicular to the loading direction and forms a high strain strip region for the 60 and 120 J damage specimens. As indicated in works, 33,40 the ply splitting and sub‐laminate buckling due to the excessive delamination result in large deformation in the central region and propagation along the transverse direction. Finally, the failure of the specimens occurs with macroscopic shear cracks across the thickness, and form a line propagating to the two edges of the specimens, corresponding to the sudden drop of compressive load in the load–displacement curve.…”

Section: Resultsmentioning

confidence: 87%

Experimental investigations on the repeated low velocity impact and compression‐after‐impact behaviors of woven glass fiber reinforced composite laminates

Li,

Yu,

Tao

et al. 2023

Polymer Composites

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In this paper, the repeated low velocity impact responses and compression‐after‐impact (CAI) behaviors of woven glass fiber‐reinforced composite laminates were studied at the same total impact energy. Three types of impact energies, 30, 40, and 60 J, were chosen for the repeated impact tests relative to the single 120 J impact event. The impact behaviors including impact contact force–displacement and energy–time curves during the impact testing were recorded. The variations of the impact mechanical characteristics such as peak impact force, maximum displacement, and energy absorption were evaluated. The methods of visual inspection and stereo microscope were applied to identify the damage morphology of the impacted laminates. The damage accumulation was evaluated employing the absorbed energy fraction and normalized maximum displacement. It was found that the influences of impact energy on the repeated impact mechanical response are more remarkable than that of the impact number, and the impact events with fewer impact numbers cause more damage to the laminates for the same accumulative impact energy. Furthermore, the load–displacement and the CAI strength versus impact number curves were compared for the CAI testing. The ultimate load and the resulted CAI strength decrease with the increase of impact number owing to the influence of damage accumulation in repeated impacts.Highlights Repeated impact responses were studied at the same total impact energy. The impact energy makes significant influence on the impact dynamic responses. The impact events with fewer impact numbers cause more damage to the composites. The CAI behavior was explored considering the effect of damage accumulation. The CAI strength of damaged laminates decreases with impact number increasing.

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Section: Resultsmentioning

confidence: 87%

Experimental investigations on the repeated low velocity impact and compression‐after‐impact behaviors of woven glass fiber reinforced composite laminates

Li,

Yu,

Tao

et al. 2023

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…Fiber reinforced composite materials, characterized by their high tensile strength, rigidity, and exceptional fatigue life, have garnered significant interest for applications in the aerospace, automotive, marine, and construction industries. [1][2][3] However, a critical limitation in the engineering design of these composites is their susceptibility to compression failure, given that their axis compressive strength is often less than 60% of their tensile strength. 4,5 Moreover, advanced composite materials frequently operate under complex stress conditions in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Off‐axis compression behavior and failure mechanisms of needled carbon/quartz fiber reinforced phenolic resin composite based on acoustic emission

Kuang,

Li,

Wang

et al. 2024

Polymer Composites

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The effect of the off‐axis angle (note as θ) on compressive properties and failure mechanisms in needled carbon/quartz fiber reinforced phenolic resin (CF‐QF/PF) composite has been investigated. For this objective, a series of quasi‐static off‐axis compression tests were performed, and a more precise and general model for predicting the compressive modulus and strength has been proposed. Further, the acoustic emission (AE) technology, including parameter‐based analysis and the Hilbert Huang Transform (HHT) method, was also employed to scrutinize the intricate damage mechanisms. The results show that specimens with θ = 0° exhibit linear and brittle behavior and are the most dangerous scenarios because delamination (accounting for 58% of the total AE accumulative energy) dominates their failure. For specimens with small off‐axis angles (0° < θ ≤ 45°), the fiber‐matrix interface determines their compressive properties. While for specimens with large off‐axis angles(45° < θ ≤ 90°), the enhanced transverse load‐bearing capacity of fibers becomes the dominant factor, characterized by significant debonding (33% when θ = 60°) and fiber breakage (27% when θ = 90°). Finally, these results were verified by optical microscopy (OM) and scanning electron microscopy images (SEM).Highlights Off‐axis compression behaviors of needled CF‐QF/PF composite are studied. A more precise and general model for predicting off‐axis compression properties is proposed. Acoustic emission technology is used to quantify different types of damage. Failure mechanisms are revealed by combining in‐situ and offline techniques.

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“…In recent years, carbon fiber-reinforced polymer composites have been widely used in aerospace and vehicle industries. [1][2][3][4][5] With the development of high-performance composites, the application of aircraft structures has been developed from secondary load-bearing structures to primary ones, such as wing fixed leading edges, ribs, clips, and angled profiles in parts of Airbus and Boeing commercial aircraft. 6 Due to the service environment, low-velocity impact (LVI) damage is inevitable for thin composite laminated structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of impact resistance and compression behavior of CF/PEEK laminates after hot‐press fusion repair with different stacking sequences

et al. 2023

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Unidirectional fiber‐reinforced composite laminates have limited resistance to out‐of‐plane impact and are prone to structural integrity damage during service due to low‐velocity impact (LVI). In this study, the hot‐press fusion method was employed to repair the impact‐damaged unidirectional carbon fiber‐reinforced poly‐ether‐ether‐ketone (CF/PEEK) thermoplastic composites. No delamination or matrix cracking induced by impact was observed in the repaired specimens, as confirmed by ultrasonic scanning and digital microscope. In addition, the hot pressing treatment enables the fibers to be covered again by the resin matrix, which eliminates fiber pull‐out and fiber/matrix debonding. Afterward, typical responses of CF/PEEK composite laminates to re‐impact and post‐repair compression are presented in a comprehensive and detailed manner, and compared with the initial impact response and compression after impact (CAI) behavior. The effects of three impact energies and two stacking sequences are considered. The results indicate that quasi‐isotropic laminates are more susceptible to localized fracture damage upon re‐impact as the impact energy increases, due to initial fiber breakage, compared to orthotropic laminates. The hot‐press treatment enhances the compression residual strength of the specimen by 20%–30% compared to its state before repair. These studies offer technical insights into the application of the hot‐press fusion method to enhance the mechanical properties of composite laminates post impact damage.

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Low velocity impact and compressive response after impact of thin carbon fiber composite panels

Cited by 26 publications

References 41 publications

Experimental investigations on the repeated low velocity impact and compression‐after‐impact behaviors of woven glass fiber reinforced composite laminates

Experimental investigations on the repeated low velocity impact and compression‐after‐impact behaviors of woven glass fiber reinforced composite laminates

Off‐axis compression behavior and failure mechanisms of needled carbon/quartz fiber reinforced phenolic resin composite based on acoustic emission

Experimental investigation of impact resistance and compression behavior of CF/PEEK laminates after hot‐press fusion repair with different stacking sequences

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