Research


The following images give a flavour of some of the research currently being undertaken at ECRE on the manufacture and characterisation of 3D woven composites.

Weaving technology is increasingly being used to produce dry multilayered preforms that are subsequently infused with a liquid matrix material to produce high performance composites. Three dimensionally (3D) woven composites, in particular, have been shown to possess many advantages compared to traditional performing methods with the ability to tailor fiber placement in the X-, Y-, and Z-axis directions. Manufacturing and performance advantages have been discussed extensively in literature, for example, improvements in compression-after-impact (CAI) strength compared with two-dimensional (2D) laminated composites and the ability to produce ‘near-net-shape’ preforms.

The 3D woven composites produced at ECRE exhibit a crack propagation value of G1C which is an order of magnitude greater than 2D woven structures, thus indicating a significantly higher resistance to delamination growth than 2D woven structures.

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Figure 1. Angle interlock fabric preform.

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Figure 2: Longitudinal (a) and transverse (b) micrograph of angle interlock loom state fabric

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Figure 3: Longitudinal (a) and transverse (b) micrograph of angle interlock composite

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Figure 4: Comparison of shear strain field between V-notch Iosipescu (left) and Rail Shear (right)test specimens

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Figure 5. CT image of 20 J impact damage.

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Figure 6. CT image of 40 J impact damage.

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Notices

Director