Experimental Investigation of Tensile Damage Mechanisms on 3-D Braided Composites with AE

Shi Yan; Li Li Jiang; Dong Hua Li

doi:10.4028/www.scientific.net/AMM.345.290

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 345Experimental Investigation of Tensile Damage...

Experimental Investigation of Tensile Damage Mechanisms on 3-D Braided Composites with AE

Abstract:

In this paper, the fracture process of 3D four-directional carbon/epoxy braided composites with different braiding angles under the monotonic tensile loading were investigated by the acoustic emission (AE) technique. The AE cumulative energy, event rate, amplitude, and the peak frequency were analyzed. At the same time, combining with the load-displacement curve varying feature, the fracture processes were divided into different stages to deeply understand the damaged mechanisms of the textile composites. Furthermore, the fracture surfaces of the specimens were observed under optical microscopy. Results reveal that the behavior of AE parameters described well the fracture process in the 3D braided composites with different braiding angles, and the damage mechanisms of the composites can be successfully identified by AE characteristics.

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Periodical:

Applied Mechanics and Materials (Volume 345)

Pages:

290-293

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.345.290

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Online since:

August 2013

Authors:

Shi Yan, Li Li Jiang, Dong Hua Li

Keywords:

3D Four-Directional, Acoustic Emission (AE), Braided Composites, Fracture, Tensile

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