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Low Velocity Impact Response and Tensile Strength of Epoxy Composites with Different Reinforcing Materials

机译：具有不同增强材料的环氧复合材料的低速冲击响应和拉伸强度

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摘要

This paper presents the results of research concerning multilayered epoxy composites reinforced with different materials. The strength of multilayered composites depends, to a large extent, on the reinforcing material. The authors decided to compare the low velocity impact response and perform tensile strength tests on several composites, to ascertain the mechanical properties of the prepared composites. Five different reinforcing materials were provided for the research (two fabrics made from aramid fibers, two fabrics made from carbon fibers and one fabric made from polyethylene fibers). The composites were manufactured by the vacuum supported hand laminating method. The low velocity impact response tests were conducted with the use of a pneumatic launcher. Three strikers with different geometry (conical striker, hemispherical striker and ogival striker) were used. A comparison of the resulting damage to the composites after the impact of the strikers was based on the images obtained using an optical microscope; tensile tests were also performed. The experimental investigation showed significant differences in the mechanical properties of the composites, depending on the applied reinforcing material. It was found that, as a result of the impacts, less damage occurred in the composites which were characterized by a lower Young’s modulus and a higher tensile strength.
机译：本文介绍了关于用不同材料加固的多层环氧复合材料的研究结果。多层复合材料的强度在很大程度上取决于加强材料。作者决定比较低速冲击响应并对几种复合材料进行拉伸强度试验，以确定制备复合材料的机械性能。提供了五种不同的增强材料进行了研究（由芳族纤维制成的两种织物，由碳纤维制成的两种织物和由聚乙烯纤维制成的一个织物）。复合材料是通过真空支撑的手动层压方法制造的。使用气动发射器进行低速冲击响应试验。使用了三个具有不同几何形状（锥形撞针，半球夹带和ogival前锋）的罢工者。在撞击器的冲击之后，基于使用光学显微镜获得的图像在复合材料损伤的比较;还进行了拉伸试验。实验研究表明，根据所施加的增强材料，复合材料的机械性能显着差异。发现，由于影响的结果，复合材料中发生的损伤较小，其特征在于较小的杨氏模量和更高的拉伸强度。

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