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Titre: | Strain and Damage Assessment of Treated and Untreated Luffa Mat Composite Using Acoustic Emission and Digital Image Correlation |
Auteur(s): | Grabi, Massinissa Chellil, Ahmed Habibi, Mohamed Laperriere, Luc Grabi, Hocine |
Mots-clés: | Luffa fiber/epoxy composite Acoustic emission (AE) Damage Digital image Correlation (DIC) Strains Poisson’s ratio |
Date de publication: | 2022 |
Editeur: | Taylor et francis |
Collection/Numéro: | Journal of Natural Fibers; |
Résumé: | In this work, acoustic emission and digital image correlation were applied to
three different composites reinforced with treated (2% and 5% NaOH) and
untreated luffa fibers during tensile testing, to follow the evolution of the
different damage modes and determine strains and Poisson’s ratio. The
tensile test results showed that alkaline treatment of 5% improved Young’s
modulus and tensile strength. In comparison, the 2% treatment showed the
most outstanding improvements in mechanical properties. The K-means
clustering methodology identified four types of damage: matrix cracking,
fiber pull-out, delamination, and fiber breaking. The 5% treated composite
had lower cumulative energy and hits than the untreated and 2% treated
composites, implying that the T5% composite suffered less damage. The DIC
results showed that the longitudinal strains found by the extensometer are
very approximate to those found by DIC, this technique also allows us to find
the transverse strains of the composites UT (0.324), T2% (0.295), and T5%
(0.207%). It is shown that the 5% alkaline treatment leads to the decrease of
Poisson’s ratio (0.2378) compared to 2% treated (0.3113) and untreated
(0.3120) composites. Based on AE, DIC results, and mechanical properties,
the T5% composite is the most successful. |
URI/URL: | https://doi.org/10.1080/15440478.2022.2073314 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/10061 |
Collection(s) : | Publications Internationales
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