Aix Marseille Université, Laboratory of Mechanics and Acoustics, LMA CNRS UPR 7051, 31 chemin Joseph-Aiguier 13402 Marseille CEDEX 20, France.
J Acoust Soc Am. 2013 Aug;134(2):EL211-6. doi: 10.1121/1.4813847.
Recent studies show the ability of diffuse ultrasound to characterize surface breaking cracks in concrete. However, derived parameters are sensitive to the presence of partially opened zones along the crack whose pattern may differ from one sample to another. The aim of this letter is to study the variation of diffuse ultrasound parameters while the sample is driven by a low frequency bending load which alternatively opens and closes the crack, allowing to access supplementary information about its morphology. The results show the sensitivity of the method for various crack depths and highlight its potential for concrete nondestructive evaluation.
最近的研究表明，漫射超声具有描述混凝土表面贯穿裂纹的能力。然而，导出的参数对裂纹中部分张开区域的存在很敏感，而这些区域的模式可能因样本而异。本函的目的是研究在低频弯曲载荷驱动下，当裂纹被交替打开和关闭时，漫射超声参数的变化，从而可以获得有关其形态的补充信息。结果表明该方法对各种裂纹深度的敏感性，并突出了其在混凝土无损评估中的潜力。
