In-plane properties of composite laminates with through-thickness pin reinforcement

By C. Steeves, Norman A. Fleck. 2006

155 citations recorded by the source corpus.

Laminated fibre-reinforced composites can be reinforced by through-thickness pins to reduce their susceptibility to delamination. However, the presence of the pins creates resin pockets and disrupts the alignment of the fibres, and may thereby lead to a degradation of the in-plane strength of the composite. Experiments and numerical simulations show that the presence of through-thickness reinforcing pins decreases the tensile strength of the composite by 27%, and the compressive strength of the composite by at least 30%. It is also shown that the pattern in which the pins are inserted has a strong influence on the compressive strength. A pin pattern is identified in order to minimise fibre alignment disruption and thereby maximise the compressive strength.

Subfields: Computer Vision and Pattern Recognition, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0124e30718c2af82c2e118179465588cedcb3395

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In Computer Vision and Pattern Recognition

In Mechanics of Materials

Citations in the corpus

A mechanistic interpretation of the comparative in-plane mechanical properties of 3D woven, stitched and pinned composites (2010, background): “Recent research into the compressive failure of pin ned composites has showed that kink band formation occurs at a localized region wh ere the fibers are most heavily crimped by a single pin [35,103].”
Interlaminar toughening in structural carbon fiber/epoxy composites interleaved with carbon nanotube veils (2019, background): “The main drawback of these solutions is that there is an unavoidable, and often remarkable, reduction of the in-plane mechanical properties due to lamina fiber damage, stress concentration, and loss of in-plane volume fraction [9, 10].”
Limiting Mechanisms of Mode I Interlaminar Toughening of Composites Reinforced with Aligned Carbon Nanotubes (2009, background): “In state-of-the-art stitching and z-fiber reinforcement [1], through-thickness properties generally increase significantly with the number of ‘stitches’ (characterized by stitch spacing/density or volume fraction) [1,9–11], while in-plane properties are increasingly degraded as ‘stitch’ density incr”
Sensitivity and randomness in homogenization of periodic fiber-reinforced composites via the response function method (2009, methodology): “Following numerous engineering applications, the strength of composites can be estimated by the homogenization method (Florence and Sab, 2006; Steeves and Fleck, 2006).”
Impact and Delamination Failure of Multiscale Carbon Nanotube-Fiber Reinforced Polymer Composites: A Review (2011, methodology): “These methods enhanced the interlaminar properties but at the cost of in-plane mechanical properties (Chang et al., 2007; Dickinson et al., 1999; Reeder, 1995; Steeves and Fleck, 2006).”
Joining prepreg composite interfaces with aligned carbon nanotubes (2008, background): “Bridging is one of the most effective toughening mechanism known [22], and in stitching and z-fiber reinforcement [25], through-thickness properties generally increase significantly with the number of stitches (characterized by stitch spacing/density or volume fraction [26–28]), while in-plane prope”