Abstract
In this paper, a set of initial R-curves were measured for three different in-plane sizes using scaled Over-height Compact Tension (OCT) specimens and two different stacking sequences. The data reduction scheme was based on a Virtual Crack Closure Technique which is informed by the measured failure load and effective crack length. The R-curve effects were studied by using X-ray Computed Tomography to measure the crack length throughout fracture propagation. It was found that the initial R-curves measured from all three specimen sizes follow the same linearly increasing trend, with similar results for both stacking sequences. However, no plateau was seen on any of the measured R-curves, implying that even the largest specimens are not large enough to generate a full R-curve.
Original language | English |
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Article number | 109077 |
Number of pages | 9 |
Journal | Composites Science and Technology |
Volume | 216 |
Early online date | 5 Oct 2021 |
DOIs | |
Publication status | Published - 10 Nov 2021 |
Keywords
- Fracture
- Fracture toughness
- X-ray computed tomography
- R-curve