Logoń Dominik
Faculty of Civil Engineering, Wrocław University of Science and Technology, 50-377 Wrocław, Poland.
Materials (Basel). 2019 Jul 15;12(14):2266. doi: 10.3390/ma12142266.
The paper presents the identification of the destruction process in a quasi-brittle composite based on acoustic emission and the sound spectrum. The tests were conducted on a quasi-brittle composite. The sample was made from ordinary concrete with dispersed polypropylene fibers. The possibility of identifying the destruction process based on the acoustic emission and sound spectrum was confirmed and the ability to identify the destruction process was demonstrated. It was noted that in order to recognize the failure mechanisms accurately, it is necessary to first identify them separately. Three- and two-dimensional spectra were used to identify the destruction process. The three-dimensional spectrum provides additional information, enabling a better recognition of changes in the structure of the samples on the basis of the analysis of sound intensity, amplitudes, and frequencies. The paper shows the possibility of constructing quasi-brittle composites to limit the risk of catastrophic destruction processes and the possibility of identifying those processes with the use of acoustic emission at different stages of destruction.
本文介绍了基于声发射和声谱对准脆性复合材料破坏过程的识别。试验是在准脆性复合材料上进行的。样品由掺有分散聚丙烯纤维的普通混凝土制成。基于声发射和声谱识别破坏过程的可能性得到了证实，并展示了识别破坏过程的能力。需要指出的是，为了准确识别失效机制，有必要首先分别对其进行识别。利用三维和二维谱来识别破坏过程。三维谱提供了额外的信息，能够在分析声强、振幅和频率的基础上更好地识别样品结构的变化。本文展示了构建准脆性复合材料以限制灾难性破坏过程风险的可能性，以及在破坏的不同阶段利用声发射识别这些过程的可能性。
