Publications by authors named "Horia Alexandru Petrescu"
Article Synopsis
- The study examines the impact of environmental factors on the mechanical properties of carbon-aramid hybrid composite materials, particularly focusing on moisture absorption and temperature effects.
- It compares the low-velocity impact behavior of composites with and without a rubber core, testing them at energies of 25 J and 50 J, and evaluates differences between wet and dried specimens.
- Key findings indicate that wet specimens without a rubber core absorbed 16% less impact energy than dried ones, while the wet specimens with a rubber core showed significant degradation, with a 53.26% reduction in absorbed impact energy after prolonged water exposure.
The present paper is focused on evaluating the most suitable dispersion method in the epoxy matrix of two self-healing systems containing dicyclopentadiene (DCPD) and 5-ethylidene-2-norbornene (ENB) monomers encapsulated in a urea-formaldehyde (UF) shell, prior to integration, fabrication and impact testing of specimens. Both microstructural analysis and three-point bending tests were performed to evaluate and assess the optimum dispersion method. It was found that ultrasonication damages the microcapsules of both healing systems, thus magnetic stirring was used for the dispersion of both healing systems in the epoxy matrix.
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