Life prediction for fatigue of T800/5245 carbon-fibre composites: I. Constant-amplitude loading

Gathercole, Nicholas; Reiter, H.; Adam, T.; Harris, B.

doi:10.1016/0142-1123(94)90478-2

Cited by 151 publications

(89 citation statements)

References 8 publications

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“…In contrast, other investigations have revealed the opposite trend [31,32,36]. Further, several studies have also suggested that no load sequence effects exist in composites [33,34]. Clearly, a further detailed investigation on the mechanisms of load interaction effects would assist in understanding the load sequence effects in GFRP-neat and GFRPhybrid composites.…”

Section: Variable Amplitude Fatigue Behaviormentioning

confidence: 64%

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Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Manjunatha¹,

Jagannathan²,

Padmalatha³

et al. 2011

Journal of Reinforced Plastics and Composites

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A thermosetting epoxy polymer was hybrid-modified by the addition of 9 wt.% of rubber microparticles and 10 wt.% of silica nano-particles. Glass-fiber reinforced plastic (GFRP) composite laminates employing the unmodified epoxy matrix (GFRP-neat), and the hybrid epoxy matrix (GFRP-hybrid), were produced by a resin infusion technique. The experimental fatigue lives of both GFRP composites under three different variable amplitude load sequences, namely (i) a three-step increasing block, (ii) a three-step decreasing block and, (iii) a random block load sequence derived from a three-step load block, were determined. The fatigue life of the GFRPhybrid composite was higher than that of the GFRP-neat composite under all the three load sequence blocks investigated, by about x2.6 to x4.0 times. The saturated matrix crack density and the stiffness reduction rate were both lower in the GFRP-hybrid composite compared to the GFRP-neat composite material. The suppressed matrix cracking and reduced delamination growth rates measured in the hybrid-modified epoxy matrix enhanced the fatigue life of the corresponding GFRP-hybrid composite. Using the constant amplitude fatigue data generated at various stress ratios, the fatigue lives under these variable amplitude load sequence blocks were predicted using empirical models. The predicted fatigue lives, although non-conservative, were in reasonably agreement with the experimental results.

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Section: Variable Amplitude Fatigue Behaviormentioning

confidence: 64%

“…It is of interest to note that, load sequence effects on the fatigue life of composites have been investigated by several authors [30][31][32][33][34][35][36][37]. Many studies have shown that a high-low sequence (DB type) lead to a lower fatigue life compared to a low-high (IB type) sequence [30].…”

Section: Variable Amplitude Fatigue Behaviormentioning

confidence: 99%

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Manjunatha¹,

Jagannathan²,

Padmalatha³

et al. 2011

Journal of Reinforced Plastics and Composites

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“…The models are: the linear (LR) [15], the piecewise linear (PWL) [15], the piecewise non-linear (PNL) [16], the Harris (HR) [17,[23][24], the Kawai (KW) [8], and the Boerstra (BR) [25]. The linear CLD can be easily derived using only one set of experimental data usually under reversed loading and assumes a similar failure mode under tension and compression loading.…”

Section: Resultsmentioning

confidence: 99%

Experimental investigation and modeling of mean load effect on fatigue behavior of adhesively-bonded pultruded GFRP joints

Sarfaraz

Vassilopoulos

Keller

2012

International Journal of Fatigue

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“…In addition, the PNL model was a mathematical representation of the material's properties on the R − σ a plane, and the equations were derived without any assumptions. e Bell model was derived by Harris et al, and it was based on the semiempirical formulations [27][28][29]. e result of this model was a continuous bell-shaped line from compressive strength to tensile strength, which was obtained from a nonlinear equation by fitting the experimental data.…”

Section: Constant Life Diagram Modelsmentioning

confidence: 99%

Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber‐Reinforced 2060 Al‐Li Alloy Laminates under Spectrum Loading

Meng

Xie

Wang

et al. 2018

Advances in Materials Science and Engineering

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is paper presents a study on the fatigue life prediction of notched fiber-reinforced 2060 Al-Li alloy laminates under spectrum loading by applying the constant life diagram. Firstly, a review on the state of the art of constant life diagram models for the life prediction of composite materials is given, which highlights the effect on the forecast accuracy. en, the fatigue life of notched fiber-reinforced Al-Li alloy laminates (2/1 laminates and 3/2 laminates) is tested under cyclic stress, which has different stress cycle characteristics (constant amplitude loading and Mini-Twist spectrum loading). e introduced models are successfully realized based on the available experimental data of examined laminates. In the case of Mini-Twist spectrum loading, the effect of the constant life diagram on the life prediction accuracy of examined laminates is studied based on the rainflow-counting method and Miner damage criteria. e results show that the simple Goodman model and piecewise linear model have certain advantages compared to other complex models for the life prediction of notched fiber metal laminates with different structures under MiniTwist loading. From the engineering perspective, the S-N curve prediction based on the piecewise linear model is most applicable and accurate among all the models.

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Life prediction for fatigue of T800/5245 carbon-fibre composites: I. Constant-amplitude loading

Cited by 151 publications

References 8 publications

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Improved variable-amplitude fatigue behavior of a glass-fiber-reinforced hybrid-toughened epoxy composite

Experimental investigation and modeling of mean load effect on fatigue behavior of adhesively-bonded pultruded GFRP joints

Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber‐Reinforced 2060 Al‐Li Alloy Laminates under Spectrum Loading

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