Acoustic Emission Characteristics of Mode I Delamination in Glass/Polyester Composites

被引：48
作者：
Oskouei, Amir Refahi [1 ]
Ahmadi, Mehdi [1 ]
机构：
[1] Amirkabir Univ Technol, Nondestruct Testing Lab, Dept Mech Engn, Tehran 15914, Iran
来源：
JOURNAL OF COMPOSITE MATERIALS | 2010年 / 44卷 / 07期
关键词：
acoustic emission; composite; delamination; DCB; SEM; INTERLAMINAR CRACK-PROPAGATION; FRACTURE-TOUGHNESS; DAMAGE;
D O I：
10.1177/0021998309349553
中图分类号：
TB33 [复合材料];
学科分类号：
摘要：
This article proposes an experimental study on the mode I interlaminar fracture of glass/polyester composites by using acoustic emission (AE) to analyze the damage evolution and evaluate the interlaminar performance of polymeric composites. A delamination process simulated with a double cantilever beam in opening mode (Mode I) coupled with an AE technique has been employed. The microscopic observation (scanning electron microscopy) is used to determine the correlation between different fracture mechanisms and their corresponding AE signal frequency content. Selected emissions are classified as matrix cracking, fiber breakage, or interface processes (fiber-matrix debonding) based on their total power in defined frequency intervals of the spectral power density. A correlation was established between the mechanical energy release rate and the AE energy rate. Analysis in the frequency domain shows AE parameters are powerful indicators of the intensity of the damage.
引用
收藏
页码：793 / 807
页数：15
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