Investigations of delamination criticality and the transferability of growth criteria

Olsson, Robin; Thesken, John C.; Brandt, Fredric S; Jonsson, Narcisa; Nilsson, Sören

doi:10.1016/s0263-8223(96)00079-7

Cited by 27 publications

(7 citation statements)

References 24 publications

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“…The material properties, strength properties, and damage parameters used in the simulations were obtained from Camanho [45] and are shown in Table 1. where Mode II delamination toughness beginning from a thin insert was seen to be lower in cases where delamination-migration occurs than in cases where delamination initiates and remains in-plane [47].…”

Section: Simulation Resultsmentioning

confidence: 83%

Interaction of delaminations and matrix cracks in a CFRP plate, Part II: Simulation using an enriched shell finite element model

McElroy

Gutkin

Pankow

2017

Composites Part A: Applied Science and Manufacturing

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Numerical simulations are presented of a recently developed test which creates multiple delaminations in a CFRP laminate specimen that grow and interact via transverse matrix cracks [1]. A novel shell element enriched with the Floating Node Method, and a damage algorithm based on the Virtual Crack Closure Technique, were used to successfully simulate the tests. Additionally, a 3D high mesh fidelity model based on cohesive zones and continuum damage mechanics was used to simulate the tests and act as a representative of other similar state-of-the-art high mesh fidelity modeling techniques to compare to the enriched shell element. The enriched shell and high mesh fidelity models had similar levels of accuracy and generally matched the experimental data. With runtimes of 36 minutes for the shell model and 55 hours for the high mesh fidelity model, the shell model is 92 times faster than the high-fidelity simulation.

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Section: Simulation Resultsmentioning

confidence: 83%

Interaction of delaminations and matrix cracks in a CFRP plate, Part II: Simulation using an enriched shell finite element model

McElroy

Gutkin

Pankow

2017

Composites Part A: Applied Science and Manufacturing

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“…The initial information about the presence of the delamination can be also obtained by experimental approaches. Among them are the non-destructive testing methods such as acoustic emission, ultrasonic examination and others [30][31][32][33]. Another promising direction is embedding of the sensor elements, such as piezoelectric sensors and sensors, based on optical fibers [34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Modelling of fracture processes in laminate composite plates with embedded delamination

Tashkinov¹

2016

Frattura Ed Integrità Strutturale

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This work is devoted to research and development of models for the processes of nucleation and growth of delamination in laminated composite materials. Possibilities of fracture mechanics approaches using virtual crack closure technique as well as progressive failure analysis based on the failure criteria are demonstrated. Influence of the initial delamination size on the rate of growth of the defect is studied. A comparative analysis of the applicability of fracture criteria to modeling of samples with delamination were performed, including implementation of element deletion algorithm. The numerical results obtained with the studied methods were compared. Citation: Tashkinov, M. A., Modelling of fracture processes in laminate composite plates with embedded delamination Frattura ed Integrità Strutturale, 39 (2017) 248-262.

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“…The requirement is that, at the front, the strain-energy release rate, G, should be less than or equal to the critical strain-energy release rate, G c . This process does not ÿt naturally into the ÿnite element context and special methods have been developed which provide an outer loop around the ÿnite element method [8][9][10]. An alternative approach, which we will consider here, involves the decohesive zone model [11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Adaptive hierarchical enrichment for delamination fracture using a decohesive zone model

Crisfield

Alfano²

2002

Numerical Meth Engineering

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SUMMARYThe paper describes a method for modelling delamination in ÿbre-reinforced composite structures with the aid of a decohesive zone model and interface elements. Unless a ÿne mesh is provided, the resulting load=de ection responses are very non-smooth and the iterative non-linear solution procedure may fail. To overcome this problem, the elements around the softening process zone are enriched with hierarchical polynomial functions. The enriched zones change as the analysis proceeds and the cracks propagate. This procedure is implemented using a technique which continually modiÿes the boundary conditions.

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Investigations of delamination criticality and the transferability of growth criteria

Cited by 27 publications

References 24 publications

Interaction of delaminations and matrix cracks in a CFRP plate, Part II: Simulation using an enriched shell finite element model

Interaction of delaminations and matrix cracks in a CFRP plate, Part II: Simulation using an enriched shell finite element model

Modelling of fracture processes in laminate composite plates with embedded delamination

Adaptive hierarchical enrichment for delamination fracture using a decohesive zone model

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