Projects per year
Abstract
This paper presents detailed experimental information on mode-II delamination development in fibre/epoxy composite materials and provides observations about the process zone in the vicinity of the crack tip. It is shown that the energy dissipated in delamination propagation is spent on two ways (i) creating new fracture surfaces (delamination) and (ii) nonlinear shear deformation in the composite plies adjacent to the delaminating interface. Therefore, the nonlinear process zone is not restricted to the resin-rich interface between the layers, but also extends into the fibre/epoxy composite layers. This is different from the conventional assumption in modelling delamination using cohesive elements where the fibre/epoxy layers are fully linear-elastic and the process zone is lumped at the plane of fracture. Based on the accurately measured displacement field around the crack tip, the experimental traction-separation relation at the interface is found to be trapezoidal which is again different from the conventional bilinear cohesive law.
Original language | English |
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Pages (from-to) | 115-124 |
Number of pages | 10 |
Journal | Composites Science and Technology |
Volume | 134 |
Early online date | 3 Aug 2016 |
DOIs | |
Publication status | Published - 6 Oct 2016 |
Keywords
- Hybrid composites
- Interface
- Plastic deformation
- Scanning electron microscopy
- Traction-separation law
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Dive into the research topics of 'Energy dissipation during delamination in composite materials – An experimental assessment of the cohesive law and the stress-strain field ahead of a crack tip'. Together they form a unique fingerprint.Projects
- 1 Finished
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HiPerDuCT - Programme Grant - Full Proposal
Bond, I. P. (Co-Principal Investigator), Etches, J. A. (Researcher), McAlpine, H. C. (Manager), Potter, K. D. (Co-Principal Investigator), Weaver, P. M. (Co-Principal Investigator), Bismarck, A. (Co-Principal Investigator), Shaffer, M. (Co-Principal Investigator) & Wisnom, M. R. (Principal Investigator)
1/07/11 → 30/06/18
Project: Research
Datasets
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EPSRC-Hiperduct
Jalalvand, M. (Creator), Wisnom, M. (Creator), Fuller, J. (Creator), Czel, G. (Creator) & McAlpine, H. (Data Manager), University of Bristol, 11 Aug 2016
DOI: 10.5523/bris.91unnvqibajq1kf7fhsat28yv, http://data.bris.ac.uk/data/dataset/91unnvqibajq1kf7fhsat28yv
Dataset
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Javier Llorca
Czel, G. (Host)
12 Jun 2013Activity: Hosting a visitor types › Hosting an academic visitor
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Madrid Institute for Advanced Studies of Materials (IMDEA), Madrid
Czel, G. (Visitor)
6 Mar 2013 → 15 Mar 2013Activity: Visiting an external institution types › Visiting an external academic institution