Journal
COMPOSITE STRUCTURES
Volume 212, Issue -, Pages 326-337Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2019.01.049
Keywords
Fabric; Aramid fibre; Yarn pull-out; Mechanical testing; Impact; Numerical model
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Funding
- Ministry of Economy and Competitiveness of Spain [RTC-2015-3887-8, DPI2017-88166-R]
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In this work, seven different types of fabrics based on para-aramid yarns with different interlacing geometries and reinforcement polymer matrix have been characterised and compared from yarn level to weave level. Mechanical properties such as maximum stress, failure strain, and elastic modulus have been obtained from uniaxial tensile tests, while the inter-yarn friction coefficients (static and kinetic) have been obtained by a combination of single yarn pull-out tests and an analytical model. Results show that mechanical properties are quite similar at yarn level but different at fabric level. Thus, the geometry, orientation and section of the yarn play an important role in the mechanical properties of the fabric. As an application of these results, a mesoscopic three-dimensional numerical model has been developed, and simulations of ballistic impact test have been carried out validating the model with experimental tests.
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