Experimental study on delamination migration in composite laminates

Pernice, M. Francesca; Carvalho, N.V. De; Ratcliffe, James G.; Hallett, Stephen R.

doi:10.1016/j.compositesa.2015.02.018

Cited by 67 publications

(47 citation statements)

References 21 publications

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“…Other studies have reported that, as the crack propagates, it moves to adjacent plies [13][14][15][16]. This occurs because the energy required to propagate the crack through the migration is significantly lower than the energy required to propagate along the existing crack plane [14].…”

Section: Fracture Surface Analysismentioning

confidence: 99%

Mode I Interlaminar Fracture Toughness and Fractographic Observation of Multidirectional Carbon Fiber/Epoxy Composites

al.¹

2019

IJMPERD

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Mode I interlaminar fracture toughness was evaluated and fracture surfaces were observed to investigate crack propagation behaviors and establish the relationship between fracture toughness and fracture surface morphology in multidirectional carbon fiber/epoxy composites. Double cantilever beam specimens, with artificial cracks made of Teflon film embedded in the middle plane, were prepared. Six crack lengths were considered (25-50 mm). The slopes of the load displacement curves depend on the initial crack length. The mode I interlaminar fracture toughness at crack initiation is approximately constant, regardless of the initial crack length, but fluctuates with crack propagation. The fracture surface morphology indicates that the R-curve is closely related to the crack propagation mechanism.The fracture surface exhibits damage, such as crack migration, fiber bridging, crack branching, double cracking, and ply splits. These results provide insight into interlaminar fracture toughness assessment and the crack propagation behavior of multidirectional carbon fiber/epoxy composites.

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Section: Fracture Surface Analysismentioning

confidence: 99%

Mode I Interlaminar Fracture Toughness and Fractographic Observation of Multidirectional Carbon Fiber/Epoxy Composites

al.¹

2019

IJMPERD

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“…behavior, e.g. delamination migration [18,19], in which not only delamination but also matrix cracking can be simulated.…”

Section: Mixed Mode Responsementioning

confidence: 99%

“…This ECDM formulation is a lower order equilibrium system compared to standard XFEM, and the ECDM permits nodal displacement calculation of the cracked element using standard FEM DoFs only.In the equilibrium Eq (19),. the sub matrix of elemental stiffness matrix can all be obtained by integration within the 2D element domain Ωe.…”

mentioning

confidence: 99%

A highly efficient prediction of delamination migration in laminated composites using the extended cohesive damage model

Chen²

2017

Composite Structures

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“…Matrix cracking and delamination were modeled within the same FNM elements and the method well captured the experimental data and observation. Pernice et al 9 extended the delamination migration tests to angle-ply laminates with ply orientations θ = 60 º and 75 º . Two main stages for migration were recorded: delamination first initiates from [0/θ ] interface, transforming to intra-ply cracks through θ ply bunches, and continue to grow as delamination in the [ θ /0] interface.…”

Section: Introductionmentioning

confidence: 99%

A continuum damage description for a discrete crack modeling approach for delamination migration in composite laminates

Chinh¹

2018

Preprint

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A three-dimensional discrete crack embedded within a continuum damage mechanics (CDM) model is developed for an effective characterization of delamination migration in composite laminates subjected to static loading. 3D Hashin failure criterion is implemented for damage initiation prediction under a 3D stress state. Matrix crack initiation criteria coupled with a maximum principal stress direction are employed to determine the location and orientation of a discrete matrix crack within an element. Given the orientation of the initiated matrix crack, the resulting stiffness degradation is characterized in the local principal stress coordinate system and an energy driven failure mechanism is included to capture the crack growth. By coupling the cohesive model for delamination and the discrete damage embedded CDM for matrix cracking, their synergistic interaction can be captured during the simulation of the delamination migration. The predictive capability of the enhanced modeling strategy is examined through simulation of a delamination migration in a cross-ply tap laminate. The predicted results are compared with the experimental data published by NASA and good agreements are achieved in terms of load displacement curve and the location of crack branching.

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Experimental study on delamination migration in composite laminates

Cited by 67 publications

References 21 publications

Mode I Interlaminar Fracture Toughness and Fractographic Observation of Multidirectional Carbon Fiber/Epoxy Composites

Mode I Interlaminar Fracture Toughness and Fractographic Observation of Multidirectional Carbon Fiber/Epoxy Composites

A highly efficient prediction of delamination migration in laminated composites using the extended cohesive damage model

A continuum damage description for a discrete crack modeling approach for delamination migration in composite laminates

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