Failure mechanisms of uni-ply composite plates with a circular hole under static compressive loading

Article Abstract:

The failure mechanism principle of uni-ply composite plates with a circular hole and subjected to static compressive loading is determined through experimental tests. Plate specimen made of unidirectional graphite-epoxy ply positioned between two isotropic polyetherimide thermoplastic sheets are studied under uniaxial compressive forces using a hydraulic testing machine. Results reveal that the plates' compressive failure is caused by fiber microbuckling at edge of the hole.

Methods, Materials, Dynamic testing (Materials), Dynamic testing, Dynamic testing (Engineering)

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Failure mechanisms of composite plates with a circular hole under remote biaxial planar compressive loads

Article Abstract:

The results of an empirical study performed for the analysis of failure mechanisms in fibrous laminated composite plates with stress raisers in the form of circular cutouts under static biaxial planar compressive loading are presented. A series of biaxial tests were performed with 48 ply graphite/epoxy composites of various fiber orientations. In all cases, the hole diameter to plate width aspect ratio remained in a range suitable for infinite plate assumptions.

Analysis, Plates (Engineering), Metal plates (Building materials), Structural failures

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A micromechanics-based finite element model for compressive failure of notched uniply composite laminates under remote biaxial loads

Article Abstract:

The analysis of notched composite laminates loaded remotely in multiaxial compression was done through a micromechanics based failure initiation predictive capability model. The model relied on the results form a previous experimental study that investigated compression failure mechanisms in special uniply composite laminates. The experimental results showed that kink banding near the hole edge was the dominant mode of failure initiation.

Models, Polymeric composites, Polymer composites, Finite element method, Laminated materials, Laminates

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