声发射参数的灰色尖点突变模型及其在混凝土断裂分析中的应用

Grey cusp catastastrophe model of AE parameters and its application in fracture analysis of concrete material

摘要: 本文根据材料受力过程中的声发射机理,将灰色理论和突变理论相结合,建立了声发射参数的灰色尖点突变模型。利用该模型,可对材料受力过程的声发射参数进行突变分析,进而实现对材料的破坏失稳的判别、预测。文中给出的混凝土材料声发射率这一参数的突变点,对混凝土材料的断裂力学研究有重要意义。

Abstract: Based on the mechanism of acoustic emission (AE) during the loading process and combined with the grey Theory and Catastrophe Theory,the Grey cusp catastrophe model of AE parameters has been establiBhed.By using this model the catastrophe of the AE parameters during the loading proding Process can be analysed.Therefore the failure of the material can be discriminated and predicted.The catastrophe point of the AE rate of concrete material given in this paper is importal for the fracture study.