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Using mechanoluminescence as a low-cost, non-destructive diagnostic method for transient polymer impact processes

机译：使用施力致发光作为瞬态聚合物影响过程的低成本，非破坏性诊断方法

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At ballistic velocities, certain polymers such as nylon and polyethylene have been shown to exhibit mechanoluminescence (ML) upon impact. This ML event results in the emission of photons in the visible wavelength spectrum and may occur on transient timescales as short as a sub-microsecond. In this study, we take advantage of this ML phenomenon to design a low-cost diagnostic tool by recording the ML emissions. The design consists of photodiodes of spectral range in the near-infrared to visible spectrum located radially in order to record the luminescence emissions around the circumference of the ML footprint during impact. Ultra-high-molecular-weight polyethylene rods were fired at velocities between 200 and 450 m/s as preliminary proof of concept experiments. Recorded signals were post-processed to yield information such as the projectile's time-of-arrival, approximate impact location, and approximate attitude during initial impact. The experimental setup, measurement and post-processing techniques, and reconstruction results are detailed and discussed in this work. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在弹道速度下，已经显示出在撞击时表现出施力荧光（ml）的某些聚合物。该ML事件导致可见波长光谱中的光子的发射，并且可能在瞬态时间尺寸上作为亚微秒的瞬时发生。在这项研究中，我们利用这种ML现象来设计了通过记录ML排放来设计低成本诊断工具。该设计由近红外线的光谱范围的光电二极管组成，以径向位于径向的可见光谱，以便在撞击期间围绕M1占地面积的圆周围绕ML占地面积的发光发射。以200至450米/秒的速度烧制超高分子量聚乙烯棒作为概念实验的初步证明。录制的信号被处理后，以产生射弹的到达时间，近似冲击位置和初始影响的近似姿态。实验设置，测量和后处理技术，并在这项工作中详细讨论了重建结果。 （c）2019年elestvier有限公司保留所有权利。

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