Delamination Modeling of Composites for Improved Crash Analysis

Fleming, David C.

doi:10.1106/3v9w-9099-hyq3-08gr

Cited by 16 publications

(6 citation statements)

References 14 publications

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“…The fracture mechanics approach is based on the computation of the energy release rate that is compared to the critical value. Energy release rates are usually evaluated using the virtual crack closure technique [10][11][12][13]. The VCCT technique is based on Irwin's assumption that when a crack extends by a small amount, the energy released in the process is equal to the work required to close the crack down to its original length.…”

Section: Full Articlementioning

confidence: 99%

Amultilayered Solid Element used to Model Composite Delamination

Tawk

Ferrero

Barrau

et al. 2010

Advanced Composites Letters

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This paper focuses on the latest development of a solid hexahedron element for composite delamination analysis. The 8-node solid is derived from a 20-node hexahedron. It is transformed into two physical independent 4-node shell elements according to the propagation of delamination process within the element.This transformation is driven by a transfer and damage laws that are defined by calibrating the element with a FE modeling for a double cantilever beam (DCB) test. According to the position of the crack in the element, one parameter defines the degradation of the transverse properties at the Gauss point as well as the transfer of the volume element towards the bi-plate formulation. A sensitivity study of the element is presented. A global-local finite element approach coupled with the traditional virtual crack closure technique (VCCT) method allows to calculate the energy release rates and to control the propagation of cracking in the element. This method is validated by comparison between conventional FE models and experimental tests [DCB, and end load split (ELS)]. Experimental asymmetric double cantilever beam (ADCB) test is carried out and modelled using the developed element. The numerical simulation properly correlates with the experimental results.

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Section: Full Articlementioning

confidence: 99%

Amultilayered Solid Element used to Model Composite Delamination

Tawk

Ferrero

Barrau

et al. 2010

Advanced Composites Letters

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“…(Bazant and Planas, 1998). Figure 2.28 Typical stress-strain response defined for springs in cohesive failure delamination model (Fleming, 2001).…”

Section: Materials Modelsmentioning

confidence: 99%

Simulation of progressive damage development in braided composite tubes under axial compression

McGregor

Vaziri

Poursartip

et al. 2007

Composites Part A: Applied Science and Manufacturing

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“…The crack growth in DCB has been investigated in Ref. 6 and the progressive crack growth under mixed-mode loading has been addressed in Ref. 7 .…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Mode I Fracture of Angle-Ply Composites Using the Exponential Cohesive Zone Model

Guang

Nie

et al. 2014

Polymers and Polymer Composites

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The cohesive zone model (CZM), which is based on the elasto-plastic fracture mechanics, is nowadays widely used in the numerical simulation of the composites ductile crack and progressive delamination. For the sake of tracking the angle-ply composites delamination evolution accurately, the exponential CZM is applied. At first the standard double cantilever beam (DCB) specimen is modeled using the exponential interface damage law to verify the feasibility of it. The simulated results are in good agreement with the analytical results and corrected beam theory. Then in order to investigate how the ply angle influences the mode I fracture, five laminates with different ply orientations, [012/012], [012/3012], [012/4512], [012/6012] and [012/9012], are studied. The main results are obtained as follows. The delamination evolutions corresponding to different ply angles are quite non-uniform. The unidirectional laminate exhibits the stable, continuous crack growth along the specimen, so does the [012/9012] specimen. Whereas the other three specimens show very uneven fracture surfaces. When the plies change from [012/012] to [012/9012], the stiffness along the specimen is gradually reduced correspondingly, so are the distance of the delamination propagation and the peak load, while the corresponding loading displacement increases slowly. The research provides the numerical simulation method to evaluate the multidirectional laminated composites fracture toughness, and then to optimize the composite performance by the design of ply angles.

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Delamination Modeling of Composites for Improved Crash Analysis

Abstract: Finite element crash modeling of composite structures is limited by the inability of current commercial crash codes to accurately model delamination growth.

Cited by 16 publications

References 14 publications

Amultilayered Solid Element used to Model Composite Delamination

Amultilayered Solid Element used to Model Composite Delamination

Simulation of progressive damage development in braided composite tubes under axial compression

Numerical Simulation of the Mode I Fracture of Angle-Ply Composites Using the Exponential Cohesive Zone Model

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