A high rate Instron machine was used to study the dynamic tensile properties of a DOW DERAKANE 510A vinyl ester resin reinforced with 24 oz. woven roving glass fabric (510A/WR) composite. The composite was fabricated using two different methods: i) contact molding; and ii) the Seemann Composites Resin Infusion Molding Process (SCRIMP). The composites were tested in both the fill and warp directions at strain rates varying from 0.3-5/s. Overall, 36 tests were performed, generating ultimate stress, ultimate strain, and tensile modulus data. The results indicate that there is no significant difference in mechanical properties of either material over the 0.3-5/s interval, suggesting that the materials are strain rate insensitive. However, it is observed that at all three strain rates tested, the average ultimate stress and strain exceeded the static material properties for each material in both the fill and warp directions. For both materials, an increase in average ultimate stress with increasing strain rate trend is identified. The tensile modulus remained unchanged with increasing strain rate for both materials in each direction. In terms of strength and stiffness, the SCRIMP material outperformed the contact molded material in both directions at all three strain rates tested.
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