Thermoplastic polyurethane/glass fabric composite laminates: Low velocity impact behavior under extreme temperature conditions
Thermoplastic polyurethane/glass fabric composite laminates: Low velocity impact behavior under extreme temperature conditions
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DOI：
10.1016/j.compstruct.2017.01.054
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发表时间：
2017-04-15
影响因子：
6.3
通讯作者：
Lopresto, Valentina
中科院分区：
文献类型：
--
作者：
Russo, Pietro;Langella, Antonio;Lopresto, Valentina
本文报道了以热塑性聚氨酯为基料，玻璃纤维布为增强材料的热塑性层合结构的低速冲击性能，着重研究了与试样厚度和试验温度有关的影响，旨在验证其潜在的应用。通过膜堆叠和压缩模制技术获得的板在室温、25 ° C和50 ° C下使用仪表化落镖机进行测试。冲击结果的报告中的典型的负载-挠度和能量-时间曲线，但也讨论了参考众所周知的延性指数（DI）参数。正如预期的那样，冷却反映在测试样本的刚度增加以及它们更高的损坏倾向上。板厚的增加和测试温度的降低导致增强的摩擦现象在材料飞镖接触，负责的显着偏差，从完善的半经验模型的赫兹接触力和穿透energy.Finally，没有分层现象似乎被验证为所有调查样品的支持目视检查的前部和后部的冲击区域。(C)2017爱思唯尔有限公司版权所有
This paper reports the low velocity impact behavior of thermoplastic laminated structures based on thermoplastic polyurethane reinforced with woven glass fiber highlighting effects related to sample thickness and test temperature with the aim to verify their potential applications. Plaques obtained by film stacking and compression molding technologies are tested using an instrumented falling dart machine at room temperature, 25 degrees C and 50 degrees C. Impact results are reported in terms of typical load-deflection and energy-time curves, but also discussed with reference to the well known ductility index (DI) parameter. As expected, the cooling is reflected in an increased stiffness of tested specimens and their higher propensity to the damage. Increases of plate thickness and reductions of the test temperature lead to enhanced friction phenomena at the material-dart contact, responsible of significant deviations from well established semi-empirical models about the Hertz contact force and the penetration energy.Finally, no delamination phenomena seem to be verified for all investigated samples as supported by visual inspections of front and rear impacted areas. (C) 2017 Elsevier Ltd. All rights reserved.