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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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Marcellan, Alba
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Double Networks: Hybrid Hydrogels with Clustered Silicacitations
- 2023Role of Polymer–Particle Adhesion in the Reinforcement of Hybrid Hydrogelscitations
- 2023Mechanisms of damage and fracture of aramid fibers: Focus on the role of microfibril cooperativity in fracture toughnesscitations
- 2023Mechanisms of damage and fracture of aramid fibers: Focus on the role of microfibril cooperativity in fracture toughnesscitations
- 2021Macromolecular Additives to Turn a Thermoplastic Elastomer into a Self-Healing Materialcitations
- 2021Towards an understanding of the mechanical response of aramid fibers at the filament scale
- 2019In Situ tensile tests to analyze the mechanical response, crack initiation, and crack propagation in single polyamide 66 fiberscitations
- 2016Thermoresponsive Toughening in LCST-Type Hydrogels with Opposite Topology: From Structure to Fracture Propertiescitations
- 2016Multiaxial mechanical behavior of aramid fibers and identification of skin/core structure from single fiber transverse compression testingcitations
- 2016Multiaxial mechanical behavior of aramid fibers and identification of skin/core structure from single fiber transverse compression testingcitations
- 2015Multi-axial mechanical behavior of aramid fibers and identification of skin/core structure from single fiber transverse compression testing
- 2014Rheology over five orders of magnitude in model hydrogels: agreement between strain-controlled rheometry, transient elastography, and supersonic shear wave imagingcitations
- 2013Time Dependence of Dissipative and Recovery Processes in Nanohybrid Hydrogelscitations
- 2013Stress–Strain Relationship of Highly Stretchable Dual Cross-Link Gels: Separability of Strain and Time Effectcitations
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article
Mechanisms of damage and fracture of aramid fibers: Focus on the role of microfibril cooperativity in fracture toughness
Abstract
<jats:title>Abstract</jats:title><jats:p>Pushing the limits of synthetic polymers in terms of stiffness and strength, aromatic polyamide fibers–like Kevlar®–are used for demanding applications in the form of fiber assemblies as ropes. The unique mechanical performance of aramid fiber is intimately linked to its hierarchical structure and orientation, induced during the spinning process. Surprisingly, after nearly 60 years of heavy use, very little is known about damage mechanisms and rational explanation of such high resistance. We report an experimental investigation of the fiber damage mechanisms at the single fiber scale (diameter ≅ 10 μm) with the aim to establish a link with the microstructure. Damage mechanisms and crack propagation are observed in situ for the first time and unveil a widespread damage over the entire length of the fiber in the form of a network of transverse and longitudinal cracks. These observations make it possible to draw a novel scenario of fracture that mitigates the small strain failure hypothesis. To shed light on the crucial role of microfibril cooperativity in fracture toughness, a slight twist is applied to the single fiber to promote tortuosity and frictional contacts between microfibrils. Statistical fracture analysis demonstrated the beneficial impact of such torsion on early failure events, since lowest fracture stresses are shifted to higher stresses.</jats:p>