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Weiss, Alejandra Decinti
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article
Leverage of aluminium oxynitride on the impact resistance of Kevlar‐impregnated epoxy composites: Experimental and numerical evaluation under low‐velocity impact
Abstract
<jats:title>Abstract</jats:title><jats:sec><jats:label/><jats:p>The present work highlights the benefits of matrix strengthening through the inclusion of hard particles within the resin‐impregnated woven Kevlar mat. Aluminium Oxynitride (ALON) particles are added to epoxy resin by 5, 10, and 15 volume percentages. The test coupons were developed through a hand‐lay‐up technique to estimate the low‐velocity impact resistance. The characterization was performed through EDAX and SEM to ensure the presence of the ALON particles and their homogenous distribution respectively. Low‐velocity testing is preferred to assess the capacity of the materials to rebound the incident energy. The damage assessment was made to estimate the material's stiffness. The compression after impact (CAI) was executed to observe the strength of the material after the impact. The post‐CAI micrographic observation reveals the delamination history. The results manifest that the ALON–rich coupon exhibits higher impact resistance to the scale of 33.33% than that of the ALON‐free coupon. The damage assessment and CAI results annunciate the lesser damage and higher compressive strength of ALON‐rich material respectively. The micrographic study studied after the CAI reveals the delamination and failure behavior. Additionally, explicit numerical assessment was conducted to validate the experimental results. A good agreement is attained between the experimental results and numerical predictions. The enriched stiffness of the synthesized material makes it a perfect candidate for structural application where the frequency of impact loading is high.</jats:p></jats:sec><jats:sec><jats:title>Highlights</jats:title><jats:p><jats:list list-type="bullet"> <jats:list-item><jats:p>Development of ALON reinforced Kevlar‐Epoxy composites for low‐velocity impact applications.</jats:p></jats:list-item> <jats:list-item><jats:p>Evaluating the performance of developed composites under low‐velocity impact loading.</jats:p></jats:list-item> <jats:list-item><jats:p>Determining the optimal volume percentage of ALON in the composites.</jats:p></jats:list-item> <jats:list-item><jats:p>Studying the fractography of developed composites.</jats:p></jats:list-item> <jats:list-item><jats:p>Correlation between experimental and numerical studies.</jats:p></jats:list-item> </jats:list></jats:p></jats:sec>