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

Rafiee, Roham; Sotoudeh, Sina

doi:10.1177/0731684420949660

Cited by 15 publications

(9 citation statements)

References 50 publications

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“…However, the delamination crack growth is very unstable, which results in an inaccurate evaluation of the initial SERR. Furthermore, the complete R-curve cannot be obtained, which exerts a significant impact on the input parameters of FDDMs [40,41]. Therefore, the test methods for mode II are still incomplete.…”

Section: Delamination Testmentioning

confidence: 99%

“…(3) Choose the strategy of FDDMs based on loading-unloading hysteresis [11,41,139] or envelope load (cycle jump approach) [140,141].…”

Section: Initiation Criterion F Expression Evolution Law F Expressionmentioning

confidence: 99%

“…Therefore, different damage initiation and evolution criteria of delamination should be constructed according to material systems; it is a guarantee of accurately monitoring the damage initiation and critical fracture toughness under mixed-mode delamination. (3) Choose the strategy of FDDMs based on loading-unloading hysteresis [11,41,139] or envelope load (cycle jump approach) [140,141].…”

Section: Initiation Criterion F Expression Evolution Law F Expressionmentioning

confidence: 99%

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Review and Assessment of Fatigue Delamination Damage of Laminated Composite Structures

Deng,

Zhou,

et al. 2023

Materials

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Fatigue delamination damage is one of the most important fatigue failure modes for laminated composite structures. However, there are still many challenging problems in the development of the theoretical framework, mathematical/physical models, and numerical simulation of fatigue delamination. What is more, it is essential to establish a systematic classification of these methods and models. This article reviews the experimental phenomena of delamination onset and propagation under fatigue loading. The authors reviewed the commonly used phenomenological models for laminated composite structures. The research methods, general modeling formulas, and development prospects of phenomenological models were presented in detail. Based on the analysis of finite element models (FEMs) for laminated composite structures, several simulation methods for fatigue delamination damage models (FDDMs) were carefully classified. Then, the whole procedure, range of applications, capability assessment, and advantages and limitations of the models, which were based on four types of theoretical frameworks, were also discussed in detail. The theoretical frameworks include the strength theory model (SM), fracture mechanics model (FM), damage mechanics model (DM), and hybrid model (HM). To the best of the authors’ knowledge, the FDDM based on the modified Paris law within the framework of hybrid fracture and damage mechanics is the most effective method so far. However, it is difficult for the traditional FDDM to solve the problem of the spatial delamination of complex structures. In addition, the balance between the cost of acquiring the model and the computational efficiency of the model is also critical. Therefore, several potential research directions, such as the extended finite element method (XFEM), isogeometric analysis (IGA), phase-field model (PFM), artificial intelligence algorithm, and higher-order deformation theory (HODT), have been presented in the conclusions. Through validation by investigators, these research directions have the ability to overcome the challenging technical issues in the fatigue delamination prediction of laminated composite structures.

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Section: Delamination Testmentioning

confidence: 99%

“…(3) Choose the strategy of FDDMs based on loading-unloading hysteresis [11,41,139] or envelope load (cycle jump approach) [140,141].…”

Section: Initiation Criterion F Expression Evolution Law F Expressionmentioning

confidence: 99%

Section: Initiation Criterion F Expression Evolution Law F Expressionmentioning

confidence: 99%

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Review and Assessment of Fatigue Delamination Damage of Laminated Composite Structures

Deng,

Zhou,

et al. 2023

Materials

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“…This is in line with the findings of Tan [48], who also predicted the failure (size and location of delamination) of notched CFRP laminates with a cohesive zone model implemented in Abaqus CAE. Likewise, this approach was used to detect the initiation of damage in double-notched shear experiments, in which the degradation of stiffness was also taken into account [49]. As an alternative to cohesive zone models, linear elastic fracture mechanics (LEFM) is adopted to describe the damage progression originating from notches [50,51,52,53].…”

Section: Stress Concentration At Notches Under Static Loadingmentioning

confidence: 99%

Progressive Damage in thin 2D Woven CFRP Laminates due to Stress Concentrations at Free Edges and Notches

Heinzlmeier,

Siberer,

Kralovec

et al. 2023

9th ECCOMAS Thematic Conference on the Mechanical Response of Composites

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Stress concentrations are present at cut-outs, notches, and generally at free edges in woven CFRP structures. Under cyclic loading, damage initiates from these stress raisers and progresses into the laminate, leading to strength reduction and structural failure.The present contribution provides a literature review summarizing analytical, experimental and numerical investigations regarding damage initiation and propagation in the presence of free edges and at notches in thin plain-woven 2D CFRP laminates. For free edges, initiation of damage is given as interlaminar matrix cracking. Modelling approaches for the progression by cohesive zone models or linear-elastic fracture mechanics are summarized. Recent advances using image correlation and numerical modelling are presented. In terms of notches, a brief survey of relevant literature is given, followed by a more detailed treatment of the damage progression originating from a circular hole. Additionally, the shortcomings of standard specimens with holes for fatigue damage progression investigations are addressed, since both mechanisms, damage from the free edge and the hole, interact. Latest research to uniquely identify the damage emanating from the hole is presented.

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“…However, the cohesive zone can be easily adjusted and changed without the need for extensive remeshing. A new approach to simulate the delamination initiation under cyclic loading conditions is in focus of [28]. They used the hysteresis cohesive zone modelling in conjunction with gradual degradation of the interface properties.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Thermoplastically Welded CFRP Structures

Kreikemeier

Abdulkadir

2022

Appl Compos Mater

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Carbon fibre reinforced thermoplastic polymers (CFRTP) are of particular interest to the aerospace industry. The possibility of thermoplastic welding as a joining method makes CFRTP an enabler in the pre-installation of systemic functionalities and cabin elements. This can be achieved by dust-free joining. In this work, thermoplastically welded joining zones are numerically analysed and evaluated for their failure behaviour. Finite element models for the evaluation of the peel strength (L-pull) are defined. In particular, the respective beginning of the damage as well as the damage propagation within the thermoplastic joining zone are of interest in order to identify the critical regions and to derive possibilities for design improvements.

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

Cited by 15 publications

References 50 publications

Review and Assessment of Fatigue Delamination Damage of Laminated Composite Structures

Review and Assessment of Fatigue Delamination Damage of Laminated Composite Structures

Progressive Damage in thin 2D Woven CFRP Laminates due to Stress Concentrations at Free Edges and Notches

Numerical Analysis of Thermoplastically Welded CFRP Structures

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