Department of Materials Science and Engineering, Ghent University, Technologiepark-Zwijnaarde 903, 9052 Zwijnaarde, Belgium.
Department of Materials Science and Engineering, Ghent University, Technologiepark-Zwijnaarde 903, 9052 Zwijnaarde, Belgium.
Ultrasonics. 2014 Aug;54(6):1509-21. doi: 10.1016/j.ultras.2014.04.013. Epub 2014 Apr 20.
The ultrasonic polar scan (UPS), either in transmission, reflection or backscatter mode, is a promising non-destructive testing technique for the characterization of composites, providing information about the mechanical anisotropy, the viscoelastic damping, the surface roughness, and more. At present, the technique is merely being used for qualitative purposes. The limited quantitative exploration and use of the technique can be primarily ascribed to limitations of current theoretical models as well as the difficulty to perform accurate, and more importantly, reproducible UPS experiments. Over the last years, we have identified several potential pitfalls in the experimental implementation of the technique which severely deteriorate the accurateness and reproducibility of a UPS. In this paper, we make an inventory of the most important difficulties, illustrate each of them by a real experiment and present a feasible mediation, either numerical or experimental in nature. Once the experimental set-up is fine-tuned to overcome these pitfalls, it is expected that the recording of high-level UPS experiments, in combination with numerical computations, will facilitate the technique to become a fully quantitative non-destructive characterization method.
超声极坐标扫描（UPS），无论是在透射、反射还是背散射模式下，都是一种很有前途的复合材料无损检测技术，它可以提供关于机械各向异性、粘弹性阻尼、表面粗糙度等方面的信息。目前，该技术仅用于定性目的。这种技术的有限定量探索和应用主要归因于当前理论模型的局限性以及难以进行准确、更重要的是可重复的 UPS 实验。在过去的几年中，我们已经发现了该技术在实验实施中存在的几个潜在问题，这些问题严重降低了 UPS 的准确性和可重复性。在本文中，我们列出了最重要的困难，并通过实际实验来说明每一个困难，同时提出了可行的解决方法，这些方法在本质上是数值的或实验的。一旦实验装置经过微调以克服这些问题，预计高水平 UPS 实验的记录，结合数值计算，将有助于该技术成为一种完全定量的无损表征方法。
