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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Baere, Ives De
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Fatigue behaviour of thermoplastic glass/polypropylene composite cross-ply laminates : an experimental study with in-situ damage observations and numerical validationcitations
- 2023Experimental and numerical fatigue damage characterization in multidirectional thermoplastic glass/polypropylene laminates based on in-situ damage observationscitations
- 2023Relation between ASTM E606 specimen geometry and misalignment in strain-controlled fatigue testingcitations
- 2022Experimental and numerical damage characterization of glass/polypropylene multidirectional laminates under quasi-static loading conditioncitations
- 2021Long-term stiffness prediction of particle filled polymers by dynamic mechanical analysis : frequency sweep versus creep methodcitations
- 2021Multi scale digital image correlation for automatic edge detection of ply cracks in composite laminates under quasi static and fatigue loading
- 2020Influencing parameters on measurement accuracy in dynamic mechanical analysis of thermoplastic polymers and their compositescitations
- 2020Dynamic Curing Agents for Amine-Hardened Epoxy Vitrimers with Short (Re)processing Timescitations
- 2017Electrospun nanofibers for highly toughened fibre reinforced polymer composite laminates
- 2017Improved fatigue delamination behaviour of composite laminates with electrospun thermoplastic nanofibrous interleaves using the Central Cut-Ply methodcitations
- 2016Damage-resistant composites using electrospun nanofibers: a multiscale analysis of the toughening mechanismscitations
- 2016TOWARDS DAMAGE RESISTANT COMPOSITES USING ELECTROSPUN NANOFIBERS: A MULTISCALE ANALYSIS OF THE TOUGHENING MECHANISMS
- 2016Interlaminar toughening of resin transfer molded laminates by electrospun polycaprolactone structures : effect of the interleave morphologycitations
- 2016Increasing the damage resistance of composites by interleaving them with electrospun nanofibrous veils
- 2015Ultrasonic polar scan imaging of fatigued fiber reinforced composites
- 2015Using a polyester binder for the interlaminar toughening of glass/epoxy composite laminates
- 2014Damage Signature of Fatigued Fabric Reinforced Plastics in the Pulsed Ultrasonic Polar Scan
- 2013Modifying the crack growth in a glass fiber reinforced epoxy by adding polyamide 6 nanofibers
- 2012The influence of polyamide 6 nanofibres on the mechanical properties of glass fibre/epoxy composites
- 2007Strain monitoring in thermoplastic composites with optical fiber sensors: embedding process, visualization with micro-tomography, and fatigue results
Places of action
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document
Multi scale digital image correlation for automatic edge detection of ply cracks in composite laminates under quasi static and fatigue loading
Abstract
Ply cracking is typically the first ply level damage mode in composite laminates under static and fatigue tensile loading. Ply cracks do not usually cause the final failure of a laminate, but may significantly degrade the effective properties of the composite and serve as a source for other damage modes initiation. However, the in-situ experimental detection and quantification of this damage mode is a challenging task specially under fatigue loading conditions without stopping the test. This work is focused on detection of ply cracking and calculation of crack density [1] in multidirectional symmetric composite laminates. The main objective of this work is to study whether the DIC technique [2] is reliable for automated crack detection and functional in calculation of crack density. Therefore, digital image correlation with 2D-DIC and 3D-DIC setups (Figure 1) at the edge and top surfaces of [02/902]s, [02/452]s and [902/02]s glass/epoxy laminates is utilized to detect crack density under uniaxial quasi-static and fatigue loading conditions. For fatigue, the maximum cyclic tensile stress of 90% of the first crack initiation stress, obtained from quasi-static tests, with load ratio σmin/σmax=0.1, frequency of 5 Hz and up to 200,000 cycles, is considered. An optimization analysis is implemented to evaluate the resolution and the standard uncertainty in DIC strain and displacement measurements. Next, a comparison is established between the discontinuities in both strain and displacement fields for crack detection. Consequently, the displacement field has proved to deliver better and more accurate results than strain fields in crack density calculation. The results obtained from DIC analysis are compared and validated by microscopic images which are acquired after performing each test (Figure 2). The study of the results shows that the developed DIC methodology are suited for automated crack detection in fatigue and quasi-static loadings, and as such extract the evolution of crack density vs. number of cycles.