Experimental Observations of Damage States in Unnotched and Notched 3D Orthogonal Woven Coupons Loaded in Tension

Jackson, Wade C.; Bergan, Andrew C.; Rose, Cheryl A.; Segal, Kenneth N.; Gardner, Nathaniel W.; Waas, Nalinda W.

doi:10.2514/6.2022-1007

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…For the IM7/RTM6 3D woven composite considered in this investigation, X-ray CT images (13.4 µm resolution) were previously generated for individual pristine specimens [ 30 ]. These data are from panel “1Z” in ref.…”

Section: Methodsmentioning

confidence: 99%

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Multiscale Progressive Failure Analysis of 3D Woven Composites

et al. 2022

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Application of three-dimensional (3D) woven composites is growing as an alternative to the use of ply-based composite materials. However, the design, analysis, modeling, and optimization of these materials is more challenging due to their complex and inherently multiscale geometries. Herein, a multiscale modeling procedure, based on efficient, semi-analytical micromechanical theories rather than the traditional finite element approach, is presented and applied to a 3D woven carbon–epoxy composite. A crack-band progressive damage model was employed for the matrix constituent to capture the globally observed nonlinear response. Realistic microstructural dimensions and tow-fiber volume fractions were determined from detailed X-ray computed tomography (CT) and scanning electron microscopy data. Pre-existing binder-tow disbonds and weft-tow waviness, observed in X-ray CT scans of the composite, were also included in the model. The results were compared with experimental data for the in-plane tensile and shear behavior of the composite. The tensile predictions exhibited good correlations with the test data. While the model was able to capture the less brittle nature of the in-plane shear response, quantitative measures were underpredicted to some degree.

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Section: Methodsmentioning

confidence: 99%

“…These data are from panel “1Z” in ref. [ 30 ], and readers are referred to that reference for more details regarding data generation and observed features. Note that the coupons whose test data are presented herein came from this same panel.…”

Section: Methodsmentioning

confidence: 99%