The effect of voids on the flexural fatigue performance of unidirectional carbon fibre composites developed for wind turbine applications

Chambers, A.R.; Earl, J.S.; Squires, Charlene A.; Suhot, Mohamed Azlan

doi:10.1016/j.ijfatigue.2006.02.033

Cited by 160 publications

(140 citation statements)

References 8 publications

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“…In polymeric composite materials, voids always have detrimental effects on the mechanical properties [3][4][5]. In general, voids have detrimental effects on the strength and fatigue life of composite laminates.…”

Section: Introductionmentioning

confidence: 99%

Qualitative separation of the effect of voids on the static mechanical properties of hygrothermally conditioned carbon/epoxy composites

Zhang¹,

Li²,

Zhang³

et al. 2011

Express Polym. Lett.

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Abstract. The paper investigates the effect of voids and hygrothermal conditions on bending, compressive, and interlaminar shear strength (ILSS) of T300/914 composite laminates. By adopting different autoclave pressures during a cure cycle, specimens with three different void contents ranging from 0.33% to 1.50% were obtained. Experimental results reveal that compressive, bending strength, and ILSS decrease with increasing void contents and immersion time. The most significant decrease in strength of aged specimens is in the ILSS and compressive strength, followed by the bending strength. The effect of voids on the absorption/desorption behavior is also discussed. For a similar porosity, the compressive strength and ILSS of dried specimens are higher than that of the aged specimens, while they are lower than that of the unaged specimens. The bending strength of the dried specimens is higher than that of the unaged specimens. The experimental results are explained by the supportive micrographs that illustrate different types of voids and their morphology before and after moisture absorption/desorption.

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Section: Introductionmentioning

confidence: 99%

Qualitative separation of the effect of voids on the static mechanical properties of hygrothermally conditioned carbon/epoxy composites

Zhang¹,

Li²,

Zhang³

et al. 2011

Express Polym. Lett.

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“…The results show that while the fibre dominated mechanical properties are not significantly influenced by voids [1,2,3,4], the matrix dominated properties are strongly dependent on their presence. Reduction in interlaminar shear [1,5,6], compressive [7,8], transverse [1,2], bending [1,3,9], fatigue [4,10,11,12] and fracture toughness [13,14,15] properties have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…The damage evolution under flexural fatigue loading was investigated by Chambers et al [12] for UD carbon fibre composites. They noticed that, by varying the void content from 1.6 to 3.1%, the fatigue life changed from 10 6 to 2000 cycles, under the same applied stress level.…”

Section: Introductionmentioning

confidence: 99%

Mode I Strain Energy Release Rate in composite laminates in the presence of voids

Ricotta

Quaresimin

Talreja

2008

Composites Science and Technology

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ACCEPTED MANUSCRIPT MODE I STRAIN ENERGY RELEASE RATE IN COMPOSITE LAMINATES IN THE PRESENCE OF VOIDS Mauroof the voids is investigated by a parametric study that showed that the enhancement of SERR increases with the size of the voids and the proximity to the crack tip and that elongated (elliptical) voids are more critical than the circular voids. Finally, the influence of more complex void distributions on the fracture toughness is evaluated by FE analysis.

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“…The composite structure made with CFRP laminates is very sensitive to the internal damage induced by the impact loading, such as a dropped wrench or runaway debris during their manufacturing and service life [7][8][9]. The main drawback of CFRP laminates is their weak interfaces which lead to a considerable reduction in the structural integrity caused by minor damage [10][11][12]. The impact damages of the composite laminates include delamination, fiber breakage and matrix cracking, which can significantly reduce their mechanical properties [13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Impact Damage of CFRP Laminates with Different Porosities

Zhang¹,

Zhang²,

Qu³

et al. 2015

Proceedings of the 2015 International Symposium on Material, Energy and Environment Engineering

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Abstract. The influence of the porosity on the impact damage of CFRP laminates was investigated. A finite element analysis model is established by using ABAQUS software combined with the sudden stiffness degradation model. The failure criterion of the impact damage of the fabric fiber reinforced composites is proposed by improving the fiber and matrix damage failure criterion, based on the failure criterion that is suitable for the undirectional composite laminates. The impact damage of longitude fiber failure, latitude fiber failure, matrix crushing and delamination were considered for the fabric carbon fiber reinforced epoxy composites laminates. Basic strength parameters of composites are used to evaluate the mechanical properties of CFRP laminates with different porosities. The impact damage area of CFRP composites laminates are simulated accurately.

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The effect of voids on the flexural fatigue performance of unidirectional carbon fibre composites developed for wind turbine applications

Cited by 160 publications

References 8 publications

Qualitative separation of the effect of voids on the static mechanical properties of hygrothermally conditioned carbon/epoxy composites

Qualitative separation of the effect of voids on the static mechanical properties of hygrothermally conditioned carbon/epoxy composites

Mode I Strain Energy Release Rate in composite laminates in the presence of voids

Numerical Simulation on the Impact Damage of CFRP Laminates with Different Porosities

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