Review of z-pinned composite laminates

By A. Mouritz. 2007

775 citations recorded by the source corpus.

This paper reviews published research into polymer composite laminates reinforced in the through-thickness direction with z-pins. Research into the manufacture, microstructure, delamination resistance, damage tolerance, joint strength and mechanical properties of z-pinned composites is described. Benefits of reinforcing composites with z-pins are assessed, including improvements to the delamination toughness, impact damage resistance, post-impact damage tolerance and through-thickness properties. Improvements to the failure strength of bonded and bearing joints due to z-pinning are also examined. The paper also reviews research into the adverse effects of z-pins on the in-plane mechanical properties, which includes reduced elastic modulus, strength and fatigue performance. Mechanisms responsible for the reduction to the in-plane properties are discussed, and techniques to minimise the adverse effect of z-pins are described. The benefits and drawbacks of z-pinning on the interlaminar toughness, damage tolerance and in-plane mechanical properties are compared against other common types of through-thickness reinforcement for composites, such as 3D weaving and stitching. Gaps in our understanding and unresolved research problems with z-pinned composites are identified to provide a road map for future research into these materials.

Subfields: Mechanical Engineering, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/26d670f8536fc2029ac30cd5748f767eea6f9bad

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In Mechanical Engineering

1. S. Khan
2. Jang‐Kyo Kim
3. B. Cox
4. Y. Ou
5. A. Mouritz
6. Carlos Gonz'alez
7. J. Vilatela
8. J. Meyer

In Mechanics of Materials

1. A. Mouritz
2. B. Cox
3. S. Khan
4. Jang‐Kyo Kim
5. Y. Ou
6. Carlos Gonz'alez
7. J. Vilatela
8. J. Meyer

Citations in the corpus

• Impact and Delamination Failure of Multiscale Carbon Nanotube-Fiber Reinforced Polymer Composites: A Review (2011, background): “org (Abe et al., 2003; Mouritz, 2007), fiber hybridization, toughening the matrix resin (Reeder, 1995) and interleaving with tough polymer, short fibers or microscale particles (Hojo et al.”
• A mechanistic interpretation of the comparative in-plane mechanical properties of 3D woven, stitched and pinned composites (2010, background): “2, which is also qualitatively representative of fiber breakage due to pinning [4,13,24-26].”
• 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].”
• Static strength of metal-composite joints with penetrative reinforcement (2014, background): “However, as shown in Figure 2, even with this fixture, some localised distortion and resin rich zones were still created within the joints; such effects have also been observed in Z-pinned joints [24].”