Predicting the ballistic strength of aramid fiber composites by implementing full factorial experimental design

Dimeski, Dimko and Srebrenkoska, Vineta (2014) Predicting the ballistic strength of aramid fiber composites by implementing full factorial experimental design. Technologica Acta, 7 (2). pp. 33-37. ISSN 1840-0426/ 2232-7568 (Online)

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The purpose of the study is to predict the ballistic strength of hard aramid fiber/phenolic ballistic composites by implementing the full factorial experimental design. When designing ballistic composites two major factors are the most important: the ballistic strength and the weight of the protection. The ultimate target is to achieve the required ballistic strength with the lowest possible weight of protection. The hard ballistic aramid/phenolic composites were made by open mold high pressure, high-temperature compression of prepreg made of plain woven aramid fibre fabric and polyvinyl butyral modified phenolic resin. The preparation of the composites was done by applying the 22 full factorial experimental design. The areal weight of the composites was taken to be the first factor and the second – fibre/resin ratio. The first factor low and high levels were chosen to be 2 kg/m2 and 9 kg/m2, respectively and for the second factor – 80/20 and 50/50, respectively. The first-order linear model to approximate the response i.e. the ballistic strength of the composites within the study domain (2 – 9) kg/m2 x (80/20 – 50/50) ratio was used. The influence of each individual factor on the response function was established, as well as the interaction of the two factors. It was found out that the estimated first-degree regression equation with interaction gives a very good approximation of the experimental results of the ballistic strength of composites within the study domain. Key words: aramid fibre, ballistic composites, factorial design, regression equation, V5

Item Type: Article
Subjects: Engineering and Technology > Materials engineering
Divisions: Faculty of Technology
Depositing User: Dimko Dimeski
Date Deposited: 30 Jan 2015 14:07
Last Modified: 30 Jan 2015 14:07

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