A shear-lag analysis of transverse cracking and delamination in cross-ply carbon-fibre/epoxy composites under dry, saturated and immersed fatigue conditions

Selvarathinam, Alex S.

doi:10.1016/s0266-3538(99)00069-x

Cited by 23 publications

(4 citation statements)

References 8 publications

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“…In [12], the computed results show that when parameter " a " is greater than 8, the strain energy release rate associated with the initiation of transverse cracking remains stable. Selvarathinam et al [31] use similar values suggested by experimental observations. Thus, in the present paper, we use this a -value to predict damage initiation.…”

Section: Respective Contribution Of Each Layer Of the Cross Ply Laminatementioning

confidence: 69%

Strain Energy Release Rate Analyse of Matrix Micro Cracking in Composite Cross-Ply Laminates

Rebière

Gamby²

2011

MSA

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The stress field distribution in composite cross ply laminates damaged by matrix cracking is analysed through an approach which uses several hypotheses to simplify the damage state. The proposed cracking criterion involves the partial components of the strain energy release rate associated with transverse and longitudinal cracking. The respective contributions of the 0° and 90° layers to the damage process are also investigated. The initiation of transverse and longitudinal cracking mechanisms is predicted. We also give an assessment of the influence of each individual component of the stress tensor on the strain energy release rate of the damaged laminate

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Section: Respective Contribution Of Each Layer Of the Cross Ply Laminatementioning

confidence: 69%

Strain Energy Release Rate Analyse of Matrix Micro Cracking in Composite Cross-Ply Laminates

Rebière

Gamby²

2011

MSA

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“…There is a possibility that specimen fatigue lives for the longer duration tests may have been extended by this phenomenon. However, previous research has also shown that submerging specimens in water when applying fatigue loading can have a pronounced effect on fatigue lives through the capillary action of water into transverse matrix cracks in FRP laminates [32][33][34]. This drives different damage mechanisms and ultimately different failure modes caused by less realistic edge conditions.…”

Section: Fatigue Strength Characterizationmentioning

confidence: 99%

Static and Fatigue Characterization of Large Composite T-Bolt Connections in Marine Hygrothermal Environments

Murdy,

Hughes,

Miller

et al. 2023

JMSE

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Fiber-reinforced polymer composites have been highlighted as ideal candidates for structural applications in marine renewable energy devices, such as tidal turbines and wave energy converters. It is well understood that harsh marine environments can cause strength degradation of composite laminates, which has been extensively researched at the coupon scale; however, no research has investigated how this translates into larger-scale composite structures. This paper presents a subcomponent-scale study which investigates the effects of hygrothermal aging and subsequent static and fatigue characterization of thick composite T-bolt connections as part of a large, multilaboratory materials research effort. Of the glass-reinforced epoxy and vinylester-epoxy matrix composites tested, both showed measurable static strength degradation (4–36%) after being hygrothermally aged, even though the composite specimens were only partially saturated with water. Under tension–tension fatigue loading, the epoxy specimens performed very well in their dry states but exhibited significant degradation after hygrothermal aging. In comparison, the vinylester-epoxy specimens had much shorter fatigue lives in their dry states but exhibited no degradation after hygrothermal aging. Overall, this research demonstrates that hygrothermal aging can have significant effects on the ultimate strengths and fatigue lives of even partially saturated thick composite T-bolt connections, indicating that degradation of the outer plies on thick composite laminates can have pronounced effects on the whole structure. It discusses the challenges of building an understanding of the effects of harsh marine environments in large-scale composite structures.

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“…Besides, the effects of environments, such as water absorption, should be considered in the large-scale structures. Although the effects of water on polymers and composites have been studied over the past several decades [8], research work about the combination effects of such mechanical damage and water absorption is a little [8][9][10]. Especially the damage mechanism has not been discussed based on the precise observation.…”

Section: Introductionmentioning

confidence: 99%

Damage evolution behavior of CFRP laminates under post-impact fatigue with water absorption environment

Saitô

Kimpara

2009

Composites Science and Technology

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A shear-lag analysis of transverse cracking and delamination in cross-ply carbon-fibre/epoxy composites under dry, saturated and immersed fatigue conditions

Cited by 23 publications

References 8 publications

Strain Energy Release Rate Analyse of Matrix Micro Cracking in Composite Cross-Ply Laminates

Strain Energy Release Rate Analyse of Matrix Micro Cracking in Composite Cross-Ply Laminates

Static and Fatigue Characterization of Large Composite T-Bolt Connections in Marine Hygrothermal Environments

Damage evolution behavior of CFRP laminates under post-impact fatigue with water absorption environment

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