Post-buckling delamination propagation analysis using interface element with de-cohesive constitutive law

Mohammadi, Bijan; Shahabi, Farhad; Ghannadpou, S.A.M.

doi:10.1016/j.proeng.2011.04.299

Cited by 4 publications

(1 citation statement)

References 3 publications

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“…Under an axial compressive load, the damage propagation width was found to expand as the depth increased from 10% to 25% of the total specimen thickness. Mohammadi et al [3] also developed a cohesive element model to predict delamination propagation in laminated composites containing single and multiple through-the-width delaminations during buckling. They found that for specimens with multiple delaminations damage propagation was unstable causing a sudden drop in the load carried accompanied by a global buckling load which was much lower than for a similar specimen with a single delamination.…”

Section: Introductionmentioning

confidence: 99%

Buckling and postbuckling behaviour of Glare laminates containing splices and doublers. Part 2: Numerical modelling

Al-Azzawi

Kawashita

Featherston

2017

Composite Structures

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A 3D finite element model using cohesive elements and continuum (bulk) material damage models was developed to examine the progressive damage and failure behaviour of Glare R Fibre Metal Laminate (FML) specimens subjected to in-plane compressive loading. The specimens contained internal 'splice' and 'doubler' features and were either pristine or contained simulated manufacturing defects in the form of artificial delaminations. The initiation and growth of delaminations at the inter-laminar interfaces, damage in the glass fibre reinforced polymer (GFRP) plies, ductile damage in the resin pockets (FM94 epoxy) and the onset of plasticity in the metal layers were examined. Geometric imperfections and load eccentricity were incorporated in an explicit dynamic nonlinear analysis implemented in the software Abaqus/Explicit. A series of buckling tests on specimens with and without artificial delaminations were conducted for validation, which are described in detail in a companion paper. Tests were monitored using Digital Image Correlation (DIC) for visualisation of full-field displacements and strains whilst Acoustic Emission (AE) monitoring enabled detection and localisation of the onset and progression of damage. Results for 'Glare 4B' specimens incorporating longitudinal and transverse delaminations into both splice and doubler geometries are presented. These results revealed that in order for the finite element analyses to be validated, all the damage and plasticity mechanisms * Corresponding author. Email address: Al-AzzawiAS@cardiff.ac.uk Preprint submitted to Composite Structures May 9, 2017 described above need to be accounted for, as well as load eccentricity and geometry imperfections.

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Section: Introductionmentioning

confidence: 99%