Pais Vânia, Silva Pedro, Bessa João, Dias Hernâni, Duarte Maria Helena, Cunha Fernando, Fangueiro Raul
Fibrenamics, Institute of Innovation on Fiber-Based Materials and Composites, University of Minho, 4800-058 Guimarães, Portugal.
Centre for Textile Science and Technology (2C2T), University of Minho, 4800-058 Guimarães, Portugal.
Polymers (Basel). 2022 May 19;14(10):2065. doi: 10.3390/polym14102065.
Low-velocity impact can cause serious damage to the person or structure that is hit. The development of barriers that can absorb the energy of the impact and, therefore, protect the other side of the impact is the ideal solution for the pointed situation. Auxetic materials and shear thickening fluids are two types of technologies that have great capabilities to absorb high levels of energy when an impact happens. Accordingly, within this study, the combination of auxetic knits with shear thickening fluids by the pad-dry-cure process was investigated. It was observed that, by applying knits with auxetic patterns produced with denser materials and combined with the shear thickening fluids, high performance in terms of absorbed energy from puncture impact is obtained. The increment rates obtained are higher than 100% when comparing the structures with and without shear thickening fluids.
低速撞击会对被撞击的人员或结构造成严重损害。开发能够吸收撞击能量从而保护撞击另一侧的屏障是解决这一特定情况的理想方案。拉胀材料和剪切增稠流体是两种在发生撞击时具有强大能力吸收大量能量的技术。因此，在本研究中，对通过轧染焙烘工艺将拉胀针织物与剪切增稠流体相结合进行了研究。观察到，通过应用由较致密材料制成的具有拉胀图案的针织物并与剪切增稠流体相结合，在穿刺撞击吸收能量方面可获得高性能。与有无剪切增稠流体的结构相比，所获得的增量率高于100%。
