Effect of the fiber density in the mechanical properties of stitched fabric reinforced composites materials
DOI:
https://doi.org/10.29105/mdi.v10i16.299Keywords:
Composite materials, Textile, mechanical characterizationAbstract
The relationship between textile architecture and fiber density with the sequence damage under tensile loading has been investigated for a composite material reinforced with a glass non crimp fiber (NCF) textile of configuration [-45º, +45º] based on epoxy resin matrix cured with high temperature hardener. Two textiles of different density were used (440 ± 5% and 227 ± 5% g/m2). The system chosen for this work consists of a bifunctional epoxy, diglycidyl ether of bisphenol A (DGEBA), cured with a tetrafunctional amine, diaminodiphenyl sulfone (DDS). This system ensures the obtaining of a rigid material with excellent mechanical properties in order to observe, analyze and identify the process and progress of the generated damage and the failure mechanism that leads to the materials fracture. The effect of the textile architecture/geometry and density were correlated to the composite mechanical behavior identifying sites of stress concentration and fracture processes by analyzing the material in tension, flexure and Iosipescu tests.
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