High-cycle fatigue characteristics of quasi-isotropic CFRP laminates

Hosoi, Atsushi; Arao, Yoshihiko; Karasawa, Hirokazu; Kawada, Hiroyuki

doi:10.1163/156855107780918964

Cited by 42 publications

(26 citation statements)

References 13 publications

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“…∆G has been used to correlate delamination growth in the case of high cycle (>10 8 cycles) fatigue [64][65][66] and to investigate the influence of the matrix [67][68][69]. It has also been used in the development of experimental procedures [70], and to investigate the effect of the stacking sequence [71,72].…”

Section: G Max Vs ∆G and The R-ratio Effectmentioning

confidence: 99%

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

Pascoe

Alderliesten

Benedictus

2013

Engineering Fracture Mechanics

221

145

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An overview is given of the development of methods for the prediction of fatigue driven delamination growth over the past 40 years. Four categories of methods are identified: stress/strain-based models, fracture mechanics based models, cohesive-zone models, and models using the extended finite element method. It is highlighted that most models are phenomenological, based on the observed macro-scale behaviour of test specimens. It is suggested that a more physics based approach, focusing on elucidating the mechanisms involved, is needed to come to a full understanding of the problem of delamination growth.

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Section: G Max Vs ∆G and The R-ratio Effectmentioning

confidence: 99%

Methods for the prediction of fatigue delamination growth in composites and adhesive bonds – A critical review

Pascoe

Alderliesten

Benedictus

2013

Engineering Fracture Mechanics

221

145

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“…That is, even if the stiffness changes during the test, if it is possible to obtain C3 beforehand and measure the response-acceleration amplitude during the test, the stress amplitude applied to the specimen can be determined from Equation (5). As shown in Figure 5, a vibration test was preliminarily performed at low excitation acceleration (10 m/s 2 ) to obtain a C3.…”

Section: Regulation Of Stress Amplitudementioning

confidence: 99%

“…where f is repetition frequency, E" is loss elastic modulus of the material, and ε is strain amplitude [5]. As expressed by Equation (7), heat generation is proportional to repetition frequency and the square of strain amplitude.…”

Section: Consideration Of Rise In Specimen Temperaturementioning

confidence: 99%

“…Another reason is that it is practically difficult to attain both a higher test frequency together and a large deformation that are necessary for testing a resin material. A carbon-fibre-reinforced (CFR) composite material was fatigue tested under a uniaxial tensile mode (stress ratio R = 0.1) at a test speed of 100 Hz by Hosoi et al [5]. Under the assumption that the test did not cause significant heat generation, the test result is considered equivalent to a result obtained at 5 Hz.…”

Section: Introductionmentioning

confidence: 99%

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High-speed bending-fatigue testing of composite materials

Ueki

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract.A methodology for high-speed fatigue testing, especially for resin materials, including fibre-reinforced composites, was devised and evaluated. To exert periodic stress on a material at a frequency of more than 200 Hz, a specimen (made of glass fibre-epoxy laminate) was fixed as a cantilever to an electromagnetic vibrator and vibrated at its resonant frequency of the first bending mode by using a resonance tracking control. The shape of the specimen was designed with finite-element vibration analysis to obtain a resonant frequency of more than 200 Hz and a desired strain distribution for inducing fatigue damage under a certain stress level. The rise in temperature during the fatigue testing (due to damping loss) was estimated by applying heattransfer theory and suppressed by external cooling to keep the specimen at room temperature. To confirm the validity of the devised high-speed-testing method, a completely reversed bending test at 1 Hz was also performed with identical specimens. The results from both testing methods (conducted at 230 Hz and 1 Hz, respectively) were plotted on a single power-law curve in an S-N plot. The good agreement between the two plots suggests that fatigue strength in the high-or giga-cycle region of resin and composites can be evaluated in a very short time if temperature is controlled appropriately.

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“…As mentioned above, the studies to evaluate the growth behavior of fatigue damage, such as transverse cracks and delamination, have been conducted. However, few studies were conducted on the growth behavior of fatigue damage over 10 8 cycles (5), (6) . Especially, it is important to investigate the initiation and propagation of fatigue damage in the high-cycle fatigue region from the viewpoint of establishing the long-term durability of structures when the concept of the damage tolerance design is adopted.…”

Section: Introductionmentioning

confidence: 99%