Nanoscale in situ observation of damage formation in carbon fiber/epoxy composites under mixed-mode loading using synchrotron radiation X-ray computed tomography

Kimura, Masao; Watanabe, Toshiki; Oshima, Sota; Takeichi, Yasuo; Niwa, Yasumasa; Seryo, Yuji; Hojo, Masaki

doi:10.1016/j.compscitech.2022.109332

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…At present, due to the development of research methods, the number of studies of the processes of accumulation and development of damage directly in the process of applying the load in situ is growing, which expands our understanding of the development of deformation processes in composite materials [ 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

“…It was shown using nanoscopic SRCT that for CFRPs with epoxy matrices, the damage distribution in a significant area depends on the local distribution of the matrix thickness between the fibers. It is noted that the destruction occurs in the area where the number of fibers is not large, and the matrix interlayers are large, i.e., in weak areas [ 40 ].…”

Section: Introductionmentioning

confidence: 99%

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Deformation Behavior of Single Carbon Fibers Impregnated with Polysulfone by Polymer Solution Method

et al. 2023

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Tensile deformation behavior of continuous high-strength and high-modulus single carbon fibers impregnated with a polysulfone solution was investigated. The effect of the carbon fiber type, mass fraction of the polymer, and the loading rate on the tensile strength was studied. It was observed that, whereas for high-modulus carbon fibers the magnitude of tensile strength depends significantly on the loading rate, for high-strength carbon fibers, such dependence was nearly not observed. SEM study shows that at low loading rates, elementary filaments inside the impregnated fiber are able to align themselves along the load application axis because a thermoplastic matrix can flow under the tensile stresses’ force. As a result, the fiber’s strength properties can be realized more effectively in the thermoplastic-based composites than in the same composite with an epoxy matrix.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Deformation Behavior of Single Carbon Fibers Impregnated with Polysulfone by Polymer Solution Method

et al. 2023

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“…If the degree of fatigue progression can be evaluated in situ by applying nondestructive testing, it is possible to estimate the remaining service life. The fatigue progression rate is considered to be correlated with microdamage such as micro-voids, micro-cracks, and fiber/resin interface delamination that occur in CFRP [2,3,4]. The authors proposed a fatigue damage evaluation method using active thermography, which has been applied as a non-destructive inspection method for aircraft composite materials.…”

Section: Introductionmentioning

confidence: 99%

Lock-in thermographic measurement and model-based evaluation of effective thermal diffusivity to quantify early stage fatigue damage of CFRP

Fujita,

Natsuko,

Abe

et al. 2023

Thermosense: Thermal Infrared Applications XLV

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Fatigue characteristics of carbon fiber reinforced plastics (CFRP) are an important factor in predicting the design life of structures such as wind turbine blades. Due to the anisotropic and heterogeneous structure of CFRP, design life prediction under fatigue stress is a challenging task. The authors proposed an approach to assess fatigue damage at the microscale using a laser-periodic-heating method based on lock-in thermography (LIT). It assumes that the rate of fatigue progression correlates with the number of micro-voids, micro-cracks, and fiber/resin delamination that inhibit heat transfer. The effective thermal diffusivity in the out-of-plane direction of CFRP laminates, which were tested under fatigue loading, showed a decreasing trend with the number of loading cycles.

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“…The developed technique can detect structure changes at early stage of phase transformations, where structures changes often begin at a short-range scale, and provide inevitable information on the kinetics. For future perspectives, the time-resolved observation techniques will be combined with X-ray microscopy, where the "trigger sites" of chemical reactions 15) and fracture 16,17) can be investigated with a spatial resolution as small as 50 nm. Time-and spatial-resolved observations will provide us indispensable information on one of the most fundamental questions: when and where a reaction initiates and propagates.…”

Section: Introductionmentioning

confidence: 99%

Best Papers Awarded in 2022 by <i>Materials Transactions</i>

Horita

2023

Mater. Trans.

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The eight papers were selected for the best paper award in 2021 to 2022 from Materials Transactions. Here, the awarded papers are briefly summarized as current trends in research of Materials Transactions. Among the eight best papers, four were specially selected for young scientists whose ages are 35 or below. An important trend in the year of 2021 is that three best papers are from a special issue with the title of "Materials Science on Hypermaterials", which is based on an ongoing national research project, Grant-in-Aid for Scientific Research on Innovative Areas.

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Nanoscale in situ observation of damage formation in carbon fiber/epoxy composites under mixed-mode loading using synchrotron radiation X-ray computed tomography

Cited by 12 publications

References 18 publications

Deformation Behavior of Single Carbon Fibers Impregnated with Polysulfone by Polymer Solution Method

Deformation Behavior of Single Carbon Fibers Impregnated with Polysulfone by Polymer Solution Method

Lock-in thermographic measurement and model-based evaluation of effective thermal diffusivity to quantify early stage fatigue damage of CFRP

Best Papers Awarded in 2022 by <i>Materials Transactions</i>

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