Delamination propagation in a multi-directional woven composite DCB specimen subjected to fatigue loading

Chaim Ishbir; Leslie Banks-Sills; Victor Fourman; Rami Eliasi

doi:10.1016/j.compositesb.2014.05.013

Delamination propagation in a multi-directional woven composite DCB specimen subjected to fatigue loading

Chaim Ishbir, Leslie Banks-Sills, Victor Fourman, Rami Eliasi

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Double cantilever beam (DCB) specimens fabricated from a graphite/epoxy (G0814/913) woven prepreg containing a straight through notch were tested by means of constant amplitude fatigue. The specimen was composed of 15 layers with fibers alternating between the weft and warp in the 0°/90° and the +45°/-45° directions. Eight fatigue tests were carried out to determine the delamination growth rate da/dN vs the nearly mode I cyclic energy release rate Δ^GI. Comparison of the delamination growth rate was made to the crack propagation rate of an aluminum alloy. It was found that a crack in the aluminum will grow faster but will be less sensitive to uncertainties or changes in load level.

Original language	English
Pages (from-to)	180-189
Number of pages	10
Journal	Composites Part B: Engineering
Volume	66
DOIs	https://doi.org/10.1016/j.compositesb.2014.05.013
State	Published - Oct 2014

Keywords

A. Fabrics/textiles
A. carbon fiber
B. Delamination
B. Fatigue

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10.1016/j.compositesb.2014.05.013

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abstract = "Double cantilever beam (DCB) specimens fabricated from a graphite/epoxy (G0814/913) woven prepreg containing a straight through notch were tested by means of constant amplitude fatigue. The specimen was composed of 15 layers with fibers alternating between the weft and warp in the 0°/90° and the +45°/-45° directions. Eight fatigue tests were carried out to determine the delamination growth rate da/dN vs the nearly mode I cyclic energy release rate ΔGI. Comparison of the delamination growth rate was made to the crack propagation rate of an aluminum alloy. It was found that a crack in the aluminum will grow faster but will be less sensitive to uncertainties or changes in load level.",

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AU - Banks-Sills, Leslie

AU - Fourman, Victor

AU - Eliasi, Rami

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Y1 - 2014/10

N2 - Double cantilever beam (DCB) specimens fabricated from a graphite/epoxy (G0814/913) woven prepreg containing a straight through notch were tested by means of constant amplitude fatigue. The specimen was composed of 15 layers with fibers alternating between the weft and warp in the 0°/90° and the +45°/-45° directions. Eight fatigue tests were carried out to determine the delamination growth rate da/dN vs the nearly mode I cyclic energy release rate ΔGI. Comparison of the delamination growth rate was made to the crack propagation rate of an aluminum alloy. It was found that a crack in the aluminum will grow faster but will be less sensitive to uncertainties or changes in load level.

AB - Double cantilever beam (DCB) specimens fabricated from a graphite/epoxy (G0814/913) woven prepreg containing a straight through notch were tested by means of constant amplitude fatigue. The specimen was composed of 15 layers with fibers alternating between the weft and warp in the 0°/90° and the +45°/-45° directions. Eight fatigue tests were carried out to determine the delamination growth rate da/dN vs the nearly mode I cyclic energy release rate ΔGI. Comparison of the delamination growth rate was made to the crack propagation rate of an aluminum alloy. It was found that a crack in the aluminum will grow faster but will be less sensitive to uncertainties or changes in load level.

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KW - B. Delamination

KW - B. Fatigue

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Delamination propagation in a multi-directional woven composite DCB specimen subjected to fatigue loading

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