Journal of Science  and Technology of Composites

Journal of Science and Technology of Composites

Comparison of mechanical properties and low velocity impact behavior of basalt/epoxy and basalt/vinyl ester composites

Document Type : Research Paper

Authors
1 Department of Mechanical Engineering, Faculty of Engineering, University of Bonab, Bonab, Iran.
2 Faculty of Mechanical Engineering, University of Tehran, Tehran, Iran.
Abstract
Nowadays, composite structures are widely used in various industries due to their unique properties. Considering the applications of composites, it is essential to evaluate their mechanical properties and impact behavior. In this study, the behavior of basalt/vinyl ester and basalt/epoxy composites was tested under impact, tensile, and flexural tests. The samples were fabricated using the hand lay-up method with a hot press technique, and standard mechanical tests were conducted on them. The results showed that the epoxy matrix composite, due to its superior mechanical properties, performed better in tensile and flexural tests compared to the vinyl ester matrix composite. In the impact test, the basalt/epoxy sample absorbed more energy; however, all the absorbed energy was utilized in the propagation of complex internal damages such as matrix cracking, delamination, and fiber breakage. In contrast, the basalt/vinyl ester sample, with lower energy absorption and a longer impact time at higher energy levels, experienced different damages. Additionally, at lower energy levels, rebound energy was observed in the basalt/vinyl ester sample, indicating its limited ability to return to its original state. This study highlights the importance of selecting an appropriate matrix to enhance the impact and mechanical performance of basalt-reinforced composites.
Keywords

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