On matrix cracking and splits modeling in laminated composites

Le, Minh Quan; Bainier, Hadrien; Néron, David; Ha-Minh, Cuong

doi:10.1016/j.compositesa.2018.10.002

Cited by 20 publications

(7 citation statements)

References 32 publications

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“…In this study, we recognize that the damage is diffuse mainly by fibre/matrix debonding, considering the assumption of the matrix microcracking saturation. 44 This debonding mechanism is induced by the simultaneous application of in-plane shear and transverse tensile stresses. 45 Therefore, it is necessary to consider in the model a coupling between these two stresses, defined by plane shear and transverse tension, to describe the evolution of the variables d, d 0 and d 23 .…”

Section: Ply-modelmentioning

confidence: 99%

Multi-scale analysis of the mechanical behaviour of a flax fibre reinforced composite under low-velocity impact

Haggui,

Jendli,

El Mahi

et al. 2024

Journal of Composite Materials

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The use of biocomposite materials in different fields requires enhanced knowledge of the nonlinear phenomena related to their complex mechanical behaviour. Namely, nonelastic mechanisms such as damage, plasticity, and rupture, potentially coupled with viscosity incidence, affect the structure’s lifetime. In this context, the aim of this paper is to propose a simplified and accessible approach that leads to modelling the overall mechanical behaviour of the composite material. The studied laminate composites were made of thermoplastic Elium resin reinforced with flax plies. Experimental quasistatic and dynamic characterisations were conducted via tensile and cyclic tensile tests to investigate the structure’s mechanical properties and corresponding failure mechanisms. The test results clearly demonstrated the presence of significant nonlinear specific coupling effects due to both flax fibre and Elium resin. The proposed multi-scale modelling analysis assumes two principal entities: the ply constituted by one or more layers of unidirectional fibres and the fibre-matrix interface considered as a surface layer of resin. Each entity was characterized by specific damage variables that were determined by mechanical tests. Model parameters were experimentally identified and expressed in the behaviour model to simulate the composite structure subjected to low-velocity impact using the Pam-Crash F.E. numerical code.

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Section: Ply-modelmentioning

confidence: 99%

Multi-scale analysis of the mechanical behaviour of a flax fibre reinforced composite under low-velocity impact

Haggui,

Jendli,

El Mahi

et al. 2024

Journal of Composite Materials

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“…If, as in many cases, the matrix cracking at the edge of the hole is more diffuse, this crack geometry favors the reduction of the local stress concentration at the edge of the singularity. This effect has been identified from an experimental point of view by many authors [8][9][10][11][12][13][14][15][16][17][18][19][20][21] and demonstrated by a test-calculation dialogue using different, mostly discrete, modeling strategies [22][23][24][25][26][27][28][29]. This explains the interest in this type of fatigue damage, which, in some cases, would allow an increase in residual resistance [13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of milled notches on the strength of open hole, filled holes, single and double lap shear CFRP tension coupons

Castanié

Achard

Chirol

2020

Composite Structures

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Splitting is the presence of a long, thin matrix crack observed in laminates stacked with unidirectional plies. The importance of splitting has been highlighted several times in the literature to explain failure scenarios of open and, more rarely, filled hole CFRP coupon specimens. This failure mode also seems to play an important role in the increase of residual strength after fatigue that is sometimes observed in such specimens. In this study, a machining process is used to mill artificial splits at the boundary of holes for open and filled holes, and for single and double lap shear specimens. A significant increase of the quasi-static tensile strength (up to + 20%) is observed in open/ filled hole coupons and for double lap shear specimens. However, for single lap-shear specimens, the results are within the dispersion of the experimental results or lower.

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“…The first path widely used for the coupling study is to explicitly discretize the transverse cracks inside the composites. Different methods have been used in the literature, including the extended finite element method (XFEM) [13,14], the floating node method (FNM) [15][16][17], and the introduction of intralaminar cohesive elements inside plies [11,18]. The essential point is that the displacement jump and stress singularity due to the transverse crack are explicitly represented for all these methods.…”

Section: Introductionmentioning

confidence: 99%

An enriched cohesive law using plane-part of interfacial strains to model intra/inter laminar coupling in laminated composites

Pulungan

Lubineau

2020

Composites Science and Technology

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On matrix cracking and splits modeling in laminated composites

Cited by 20 publications

References 32 publications

Multi-scale analysis of the mechanical behaviour of a flax fibre reinforced composite under low-velocity impact

Multi-scale analysis of the mechanical behaviour of a flax fibre reinforced composite under low-velocity impact

Effect of milled notches on the strength of open hole, filled holes, single and double lap shear CFRP tension coupons

An enriched cohesive law using plane-part of interfacial strains to model intra/inter laminar coupling in laminated composites

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