Abstract
This paper presents an experimental characterisation of the mechanical performance and behaviour of through-thickness reinforced composite laminates. To achieve this, composite blocks with individual reinforcing pins were manufactured, quality assessed and tested. Individual specimens were inspected using X-ray Computed Tomography and only the specimens with acceptable quality pin insertions were tested experimentally under a range of mode mixities. Two stacking sequences, uni-directional (UD) and quasi-isotropic (QI) were investigated. It was found that the pins inside the UD samples experienced significantly larger pin/matrix bond strength than those in the QI laminates. The resulting experimental data indicates that a non-UD laminate type may experience pin pull-out and thus increased energy absorption for a wider range of mode mixities than a UD laminate type. Energy plots show a clear transition from a pull-out to a pin rupture region for both laminate types. Specimens that experienced pin rupture during low mode mixity tests exhibited similar failure energies to those loaded in pure mode II. © 2014 Elsevier Ltd.
Original language | English |
---|---|
Pages (from-to) | 123-131 |
Number of pages | 9 |
Journal | Composites Science and Technology |
Volume | 94 |
Early online date | 6 Feb 2014 |
DOIs | |
Publication status | Published - 9 Apr 2014 |
Research Groups and Themes
- Composites UTC
Keywords
- A. Structural composites
- B. Delamination
- C. Damage mechanics
- C. Fibre bridging
- Z-pinning
Fingerprint
Dive into the research topics of 'Experimental characterisation of mixed mode traction-displacement relationships for a single carbon composite Z-pin'. Together they form a unique fingerprint.Profiles
-
Professor Stephen R Hallett
- School of Civil, Aerospace and Design Engineering - Professor in Composite Structures
- Cabot Institute for the Environment
- Composites University Technology Centre (UTC)
- Bristol Composites Institute
Person: Academic , Member, Group lead