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首页> 外文期刊>Nondestructive Testing and Evaluation >IMPACT DAMAGE CHARACTERISATION OF THERMOPLASTIC MATRIX COMPOSITES USING TRANSMISSION TRANSIENT THERMOGRAPHY
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IMPACT DAMAGE CHARACTERISATION OF THERMOPLASTIC MATRIX COMPOSITES USING TRANSMISSION TRANSIENT THERMOGRAPHY

机译：透射瞬变热成像法表征热塑性基体复合材料的损伤

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School of Construction Management and Engineering, University of Reading, Whiteknights, Reading RG6 6AY, UKIn this work, IR thermography is used as a non-destructive tool for impact damage characterisation on thermoplastic E-glass/polypropylene composites for automotive applications. The aim of this experimentation was to compare impact resistance and to characterise damage patterns of different laminates, in order to provide indications for their use in components. Two E-glass/polypropylene composites, commingled ~RTwintex (with three different weave structures: directional, balanced and 3-D) and random reinforced GMT, were in particular characterised. Directional and balanced Twintex were also coupled in a number of hybrid configurations with GMT to evaluate the possible use of GMT/Twintex hybrids in high-energy absorption components. The laminates were impacted using a falling weight tower, with impact energies ranging from 15 J to penetration. Using IR thermography during cooling down following a long pulse (3 s), impact damaged areas were characterised and the influence of weave structure on damage patterns was studied. IR thermography offered good accuracy for laminates with thickness not exceeding 3.5mm: this appears to be a limit for the direct use of this method on components, where more refined signal treatment would probably be needed for impact damage characterisation.
机译：英国雷丁大学雷丁分校雷丁分校，RG6 6AY，英国建筑管理与工程学院在这项工作中，红外热成像技术被用作非破坏性工具，用于表征汽车用热塑性电子玻璃/聚丙烯复合材料的冲击损伤。该实验的目的是比较抗冲击性并表征不同层压板的损坏模式，以便为它们在组件中的使用提供指示。特别表征了两种E玻璃/聚丙烯复合材料，它们由〜RTwintex（具有三种不同的编织结构：定向，平衡和3-D）和随机增强GMT混合而成。定向和平衡Twintex也与GMT混合在多种混合配置中，以评估GMT / Twintex混合在高能吸收部件中的可能用途。使用落重塔对层压板进行冲击，冲击能范围为15 J至穿透。在长脉冲（3 s）之后的冷却过程中使用红外热成像技术，对冲击损坏的区域进行了表征，并研究了编织结构对损坏图案的影响。红外热成像为厚度不超过3.5mm的层压板提供了良好的精度：这似乎是直接在组件上使用此方法的一个限制，在这种情况下，可能需要更精细的信号处理来表征冲击损伤。

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