Abstract The tensile deformation characteristics and the damage evolution of aluminum alloy sheets were investigated with acoustic emission (AE) technology, while microstructural characterization of material damage and surface strain were respectively measured with a morphological assessment method and digital image correlation technique. The Gurson–Tvergaard–Needleman mesoscopic damage model was incorporated in a finite element model to predict the material’s deformation and failure behavior. Results showed that there was a strong correlation between AE activity and microstructural damage evolution. It is shown that AE detection is a promising method that can be used for the quantification of microscale damage and its evolution in metallic materials.

中文翻译：

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声发射检测与损伤演化微观结构表征之间的相关性

摘要 采用声发射（AE）技术研究了铝合金板的拉伸变形特性和损伤演化，同时采用形态学评估方法和数字图像相关技术分别测量了材料损伤和表面应变的显微组织表征。Gurson-Tvergaard-Needleman 细观损伤模型被纳入有限元模型以预测材料的变形和失效行为。结果表明，AE 活性与微观结构损伤演变之间存在很强的相关性。结果表明，AE 检测是一种很有前景的方法，可用于量化金属材料中的微尺度损伤及其演变。