Interphase mechanical behavior of carbon fiber reinforced polymer exposed to cyclic loading

Cole, Daniel P.; Henry, Todd C.; Gardea, Frank; Haynes, Robert

doi:10.1016/j.compscitech.2017.08.012

Cited by 42 publications

(21 citation statements)

References 36 publications

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“…, so that three material parameters are now to be identified. Applying the M matrix = 7.99 GPa thus outlining the significant modulus gradient in the fiber, which is very similar to the results obtained in [1] by the use of extensive finite-element simulations for similar fibers. Such a modulus gradient is also observed by other local characterization techniques [41].…”

Section: Example Assuming a Graded Fibersupporting

confidence: 80%

“…This is somehow similar to what has been done to analyze nano-indentation results on thin-film materials [19,20,21,22]. This problem has been preferentially addressed using finiteelement simulations for two-phase [23,1] or graded [2] materials, so that interpreting nano-indentation results means a large computation cost. The notable exception is an in-depth sensitivity analysis which has however been conducted in a perturbative framework for very specific inclusion geometries [24].…”

Section: Introductionmentioning

confidence: 78%

“…Depending on the nature of the phases and on the process-ing of the composite, the constituents may be either intimately linked (at the crystallographic level) or they can be very poorly linked, for example just by adhesion. Additionally, differences between thermal expansions of the different materials may also lead to fracture at interfaces during the fabrication process, and residual stresses induced by crystallization of a given constituent can dramatically affect the overall properties or result in graded properties [1]. For this kind of materials, the classical mixture law based on the mechanical properties of the constituents is generally not sufficient to fully reproduce the particular macroscopic behavior of the composite itself.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of fiber/matrix composites, the presence of an interlayer at the interface is strongly suspected but rarely evidenced [3,25,26], even though its behavior is critical [27,28]. Unfortunately, this interlayer is expected to be very thin (less than 1 µm thick) and so, is very difficult to detect and even more to characterize [1,29,4,5]. In this contribution, Polyetherketoneketone (PEKK) reinforced with carbon fibers composite materials has been tested.…”

Section: Introductionmentioning

confidence: 99%

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Grid nano-indentation as full-field measurements

Gaillard

Amiot

2020

Composites Part A: Applied Science and Manufacturing

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The use of grid nano-indentation as a full-field measurement tool to investigate the properties of heterogeneous materials is described. Contrarily to the reported approaches which rely on statistical analysis, the mechanical properties fields are analyzed herein relying on a topological description of the sample. The spatial convolution function is approached using Hertz contact theory, and the obtained convolution kernel is used to retrieve the mechanical properties of the different phases. This approach is exemplified on results obtained at very low contact force (and thus very high spatial resolution) on a composite material sample made of micrometer-sized fibers in a polymeric matrix.

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Section: Example Assuming a Graded Fibersupporting

confidence: 80%

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Grid nano-indentation as full-field measurements

Gaillard

Amiot

2020

Composites Part A: Applied Science and Manufacturing

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“…Besides, a significantly higher fatigue lifetime was measured for the composite with the powder-bound fabric reinforcement, when compared to the composite with the stitched reinforcement. Cole et al [12] found the interphase mechanical behavior of carbon fiberreinforced polymer under cyclic loading, by presenting a micro-/nano-scale technique to characterize the damage formation. They utilized a finite element model to determine a material compliance effect in fibers, which provided a basis for linking local interphase mechanical behavior to the global fatigue behavior of composites.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis for effects of displacement amplitude and loading frequency on low-cycle fatigue lifetime in carbon/epoxy laminated composites

2018

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In the present article, the low-cycle fatigue lifetime of carbon/epoxy laminated composites has been investigated. The sensitivity analysis has been also performed to study effects of the displacement amplitude and the loading frequency on the low-cycle fatigue lifetimes in composites. For such objective, displacement-control low-cycle fatigue testing has been done on the open-hole standard specimen. Fatigue tests included 4 different displacement amplitudes at 200 mm/min of the loading frequency and 4 different loading frequencies under 7 mm of the displacement amplitude. The sensitivity analysis was carried out by the MINITAB software, considering a linear function for fitting experimental data by the predicting model. Experimental results showed that by increasing the displacement amplitude, the low-cycle fatigue lifetime decreased, as expected. In addition, when the loading frequency enhanced, the low-cycle fatigue lifetime of composites decreased. Besides, the maximum stress had a reverse behavior, compared to the fatigue lifetime. The sensitivity analysis depicted that the displacement amplitude was sensitive on both the fatigue lifetime and the maximum stress. The loading frequency was sensitive on the maximum stress and was not sensitive on the fatigue lifetime.

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Enhancing interfacial solvent resistance and mechanical properties of carbon fiber/polyether ether ketone composites with water‐borne sizing agents based on cross‐linkable polyphthalonitrile

Pei,

Zhao,

Guo

et al. 2024

Polymer Composites

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The inherent structural properties and elevated processing temperatures of thermoplastic resins present new challenges in the realm of carbon fiber (CF) sizing agents. Consequently, a water‐based cross‐linkable nitro‐phthalonitrile capped polyfluorenyl ether ketone sizing agent was meticulously designed. The sizing agent exhibits superior storage stability, encapsulating particles spanning dimensions from 66.51 to 87.71 nm. The inherent mechanism during the hot‐pressing stage involves a self‐crosslinking of nitrile groups toward stable structures with unparalleled resistance to solvents. The crosslinked sizing agent boasts a remarkable glass‐transition temperature of 290°C. Noteworthy, significance is the consequential 40.1% augmentation in maximum flexural strength, along with a commendable 35% increase in interlaminar shear strength for CF‐1.5/PEEK composites in contrast to their unsized CF/PEEK counterparts. In summary, the focal aspiration of this research endeavor lies in offering a straightforward and viable methodology for the exploration of cross‐linkable sizing agents, strategically catering to both “thermoplastic processing” and “thermosetting applications.”Highlights Bulky fluorenyl unit increases the intermolecular volume of copolymer poly(fluorenyl ether ketone). The introduction of the BPF unit to the molecular elevates the thermal stability of the copolymer. Unique electron‐donating proclivity of the fluorenyl group drastically improved its reactivity. The polymerization was accomplished at a relatively low temperature of 150°C for practical applications. The ILSS, IFSS, and bending strength were noteworthy increased by 35%, 74.02%, and 40.1%

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Interphase mechanical behavior of carbon fiber reinforced polymer exposed to cyclic loading

Cited by 42 publications

References 36 publications

Grid nano-indentation as full-field measurements

Grid nano-indentation as full-field measurements

Sensitivity analysis for effects of displacement amplitude and loading frequency on low-cycle fatigue lifetime in carbon/epoxy laminated composites

Enhancing interfacial solvent resistance and mechanical properties of carbon fiber/polyether ether ketone composites with water‐borne sizing agents based on cross‐linkable polyphthalonitrile

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