Advanced accelerated testing methodology for long-term life prediction of CFRP laminates

Nakada, Masayuki; Miyano, Yasushi

doi:10.1177/0021998313515019

Cited by 43 publications

(27 citation statements)

References 13 publications

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“…1–5 In our previous papers, the statistical formulation of static, creep, and fatigue strengths of CFRP has been proposed based on the matrix resin viscoelasticity. 6,7…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of statistical fatigue strengths for unidirectional carbon fiber reinforced plastics under tension loading

Nakada

Miyano

2019

Journal of Composite Materials

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The formulation for time- and temperature-dependent statistical static and fatigue strengths for carbon fiber reinforced plastics laminates is newly proposed based on the physically serious role of resin viscoelasticity as the matrix of carbon fiber reinforced plastics. In this study, this formulation is applied to the tensile strength along the longitudinal direction of unidirectional carbon fiber reinforced plastics constituting the most important data for the reliable design of carbon fiber reinforced plastics structures which are exposed to elevated temperatures for a significant period of their operative life. The statistical distribution of the static and fatigue strengths under tension loading along the longitudinal direction of unidirectional carbon fiber reinforced plastics were measured at various temperatures by using resin-impregnated carbon fiber reinforced plastics strands as specimens. The master curves for the fatigue strength as well as the static strength of carbon fiber reinforced plastics strand were constructed based on the time–temperature superposition principle for the matrix resin viscoelasticity. The long-term fatigue strength of carbon fiber reinforced plastics strand can be predicted by using the master curve of fatigue strength.

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“…1–5 In our previous papers, the statistical formulation of static, creep, and fatigue strengths of CFRP has been proposed based on the matrix resin viscoelasticity. 6,7…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of statistical fatigue strengths for unidirectional carbon fiber reinforced plastics under tension loading

Nakada

Miyano

2019

Journal of Composite Materials

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“…It is worth noting that fatigue models by Miyano et al [9,10,11] and Reifsnider et al [12] are meant to account for viscoelastic effects while the model by Epaarachchi and Clausen [13] includes the effect of frequency under the assumption of negligible hysteretic heating. However, Guedes [24] has suggested that the linear cumulative law employed by Myiano may not fare well for complex fatigue loads or long lifetimes.…”

Section: Introductionmentioning

confidence: 99%

Modelling the effect of temperature on the probabilistic stress–life fatigue diagram of glass fibre–polymer composites loaded in tension along the fibre direction

Cormier

Joncas

2017

Journal of Composite Materials

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Predicting the fatigue performance of composites has proven to be a challenge both conceptually, due to the inherent complexity of the phenomenon, and practically, because of the resource-intensive process of fatigue testing. Moreover, mechanical behaviour of polymer matrix composites exhibits a complicated temperature dependence, making the prediction of fatigue performance under different temperatures even more complex and resource intensive. The objective of this paper is to provide a method for the prediction of fatigue life of glass-polymer composites loaded in the fibre direction at various temperatures with minimal experimental efforts. This is achieved by using a static strength degradation approach to fatigue modelling, where only two parameters (including static strength) are temperature dependent, in conjunction with relationships for these two fatigue model parameters temperature dependence. The method relies on fatigue data at a single temperature and simple static tests at different temperatures to predict the effects of temperature on the material's fatigue behaviour. The model is validated on experimental data for two unidirectional (UD) and one woven glass-epoxy composites and is found to accurately predict the effect of temperature on fatigue life of composites. A method to obtain probabilistic stress-life (P − S − N) fatigue diagrams including temperature effects is also discussed. 1

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“…The applicability of ATM was confirmed for CFRP laminates and structures combined with PAN-based carbon fibers and thermosetting resins (Miyano et al 1999a(Miyano et al , b, 2008. Furthermore, advanced ATM (Nakada and Miyano 2015) was proposed by which the formulation for the master curves of time-temperature-dependent fatigue strength was done based on a theory reported by Christensen and Miyano (2006), which describes the crack kinetics in viscoelastic body statistically.…”

Section: Introductionmentioning

confidence: 99%

Multiscale modeling for long-term life prediction of CFRP structures under cyclic loading

Nakada

Miyano

2017

Multiscale and Multidiscip. Model. Exp. and Des.

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Long-term life prediction of carbon fiber reinforced polymers (CFRP) structures under cyclic loading is performed by multiscale modeling as the combination of fiber scale, layer scale, and structure scale. The concept of failure index for fiber and matrix based on the micromechanics of failure theory (MMF) developed by Sung-Kyu Ha is introduced for the determination of the failure corner in structure, failure layer in laminates, and failure mode of fiber or matrix. The accelerated testing methodology (ATM) developed by the authors is used for long-term life prediction of CFRP structures. An MMF/ATM method combined with MMF and ATM is applied to the long-term life prediction of open hole compressive CFRP laminates under cyclic loading as well as static loading. Then the predicted results are compared with the experimental ones. Results clarified that MMF/ATM method is useful for the long-term life prediction of CFRP structures under static and cyclic loading because the results mutually agree well.

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Advanced accelerated testing methodology for long-term life prediction of CFRP laminates

Cited by 43 publications

References 13 publications

Temperature dependence of statistical fatigue strengths for unidirectional carbon fiber reinforced plastics under tension loading

Temperature dependence of statistical fatigue strengths for unidirectional carbon fiber reinforced plastics under tension loading

Modelling the effect of temperature on the probabilistic stress–life fatigue diagram of glass fibre–polymer composites loaded in tension along the fibre direction

Multiscale modeling for long-term life prediction of CFRP structures under cyclic loading

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