采用纤维增强复合材料（FRP）和杨木加固的松木梁的声发射与数值分析
Acoustic Emission and Numerical Analysis of Pine Beams Retrofitted with FRP and Poplar Wood.
作者信息
Rescalvo Francisco J, Rodríguez María, Bravo Rafael, Abarkane Chihab, Gallego Antolino
机构信息
Building Engineering School, University of Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
Department of Structural Mechanics, University of Granada, Campus Fuentenueva s/n, 18071 Granada, Spain.
出版信息
Materials (Basel). 2020 Jan 16;13(2):435. doi: 10.3390/ma13020435.
Acoustic emission (AE) released by pine beams retrofitted with fiber reinforced plastic (FRP) and poplar planks in bending is analyzed. Basalt fabric (FB), carbon fabric (FC), and carbon pultruded laminate (LC) have been used as FRP. Experimental results and AE behavior are discussed based on an elastoplastic finite-element numerical model. The model demonstrates a strong strain concentration at the end of poplar planks, which causes high AE activity in these areas and acts as a precursor of the delamination of the poplar plank. Based on the experimental results, some AE criteria for predicting the onset of the delamination are tentatively proposed.
分析了在弯曲状态下用纤维增强塑料（FRP）加固的松木梁和杨木板材所释放的声发射（AE）。玄武岩织物（FB）、碳纤维织物（FC）和碳纤维拉挤层压板（LC）已被用作FRP。基于弹塑性有限元数值模型讨论了实验结果和声发射行为。该模型表明在杨木板材端部有强烈的应变集中，这导致这些区域有高的声发射活动，并作为杨木板材分层的前兆。基于实验结果，初步提出了一些用于预测分层起始的声发射准则。
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