Characterization of fatigue delamination growth under mode I and II: Effects of load ratio and load history

Androuin, Guillaume; Michel, Laurent; Maillet, I.; Gong, Xiaojing

doi:10.1016/j.engfracmech.2018.06.030

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…Androuin et al [ 74 ] investigated the impact of load ratio on fatigue crack formation at a constant and variable amplitude loading. The purpose of the research was to produce a slow-growth fatigue delamination technique for a composite that would provide moderate and reliable performance.…”

Section: Factors Affecting Mode I Fatigue Behaviourmentioning

confidence: 99%

Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review

et al. 2022

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Composites are macroscopic combinations of chemically dissimilar materials preferred for new high-tech applications where mechanical performance is an area of interest. Mechanical apprehensions chiefly include tensile, creep, and fatigue loadings; each loading comprises different modes. Fatigue is cyclic loading correlated with stress amplitude and the number of cycles while defining the performance of a material. Composite materials are subject to various modes of fatigue loading during service life. Such loadings cause micro invisible to severe visible damage affecting the material’s performance. Mode I fatigue crack propagates via opening lamina governing a visible tear. Recently, there has been an increasing concern about finding new ways to reduce delamination failure, a life-reducing aspect of composites. This review focuses on mode I fatigue behaviours of various preforms and factors determining failures considering different reinforcements with respect to fibres and matrix failures. Numerical modelling methods for life prediction of composites while subjected to fatigue loading are reviewed. Testing techniques used to verify the fatigue performance of composite under mode I load are also given. Approaches for composites’ life enhancement against mode I fatigue loading have also been summarized, which could aid in developing a well-rounded understanding of mode I fatigue behaviours of composites and thus help engineers to design composites with higher interlaminar strength.

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Section: Factors Affecting Mode I Fatigue Behaviourmentioning

confidence: 99%

Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review

et al. 2022

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“…When crack formation began, crack closure was observed (refer to Fig. 8), with the fibre debris getting pulled across the surface when increased stress amplitude was required to break the fibre in several sections (Androuin et al 2018). As per the concept of energy, bridging fibres may lead to the absorption and release of strain energy periodically during fibre unloading and loading.…”

Section: Characterization Of Crack Growth Behaviormentioning

confidence: 99%

Crack growth analysis for rice husk reinforced polypropylene composite using equivalent initial flaw size concept

Mohamed

Zainudin

Sapuan

et al. 2021

BioRes

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Crack growth that takes place in natural fibre polymer composite formations is dependent on several factors, whereby primary crack size is a key aspect that influences uncertainty of the crack growth. The nucleation stage is strongly affected by the fracture collapse of structures, unavoidably affecting the accuracy of the estimation of total fatigue life. In this research, fatigue crack was examined using rice husk/polypropylene composite specimens across stress loads ranging from 80 to 90% for ultimate tensile strength at the stress ratios R=0.1, 0.3, and 0.5. Consequently, the propagation rate of the crack was dependent on the stress ratio. Crack resistance showed a drop in the propagation rate of the crack rate with an increase in the R value. This effect produced more fibres/matrix fracture at high stress ratio, in comparison to the low stress ratio, which was verified further through scanning electron microscopy. Moreover, the S-N curve method was proposed, as it facilitates the deterministic total fatigue life discovery in a highly favorable manner via equivalent crack size approach. A strong consensus was observed between the model of prediction and the outcomes of the experiment.

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“…However, majority of experimental studies are devoted to the propagation stage of interlaminar damage. 3–10 The influence of various parameters like temperature, 11–13 stress and load ratio, 8,14–17 fiber-bridging phenomenon, 5,18–21 and hydraulic fluid and deicing fluid exposure 22 on delamination behavior of laminated composite under cycling loading are experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

A cohesive zone model for predicting the initiation of Mode II delamination in composites under cyclic loading

Rafiee

Sotoudeh

2020

Journal of Reinforced Plastics and Composites

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A new approach for simulating delamination initiation under cyclic loading is proposed. This approach is based on the hysteresis cohesive zone modeling and the gradual degradation of interface properties. The initiation of delamination is predicted based on the monotonic traction–separation law of the interface. A damage criterion is proposed that depends on the bilinear traction–separation law and interlaminar stiffness is degraded by defining a damage parameter as a function of number of cycles and bilinear traction–separation law parameters. Numerical simulation is accomplished by implementing 2D finite element modeling for the case of double-notched specimen. Four-node zero-thickness interfacial cohesive elements are defined to capture the delamination behavior of midplane in the specimen. The results of numerical simulation are compared with available experimental data and a good agreement is observed. The main novelty of this research lies on assuming a cycle-by-cycle irreversible decrease in interlaminar stiffness prior to damage initiation and applying a damage criterion based on the bilinear traction–separation law in order to predict the number of cycles for initiation of delamination.

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Characterization of fatigue delamination growth under mode I and II: Effects of load ratio and load history

Cited by 9 publications

References 20 publications

Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review

Mode I Fatigue of Fibre Reinforced Polymeric Composites: A Review

Crack growth analysis for rice husk reinforced polypropylene composite using equivalent initial flaw size concept

A cohesive zone model for predicting the initiation of Mode II delamination in composites under cyclic loading

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