AE Feature Analysis on Tensile Fracture for Plate Specimens with Pre-Cracked V Cut
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摘要: 制作了直V型切口和斜V型切口板材试件，设计了板材拉伸断裂声发射监测试验。结合金属断裂力学性能和红外热图，分别对两种切口板材主要声发射参数与断裂过程的相关性进行深入分析，研究试件损伤过程的声发射参数表征以及某些参数特征。结果表明，声发射能量计数、振铃计数、撞击、幅度和频谱峰值能较好地表征试件损伤过程。证明了声发射技术应用于钢制结构损伤实时监测和预警的可行性，并得出某些声发射参数的重要特征。Abstract: The plate specimens with V cut pre-cracked were fabricated and the test using acoustic emission(AE) to monitor the process of tensile fracture of plate specimens was designed. Associated with fracture mechanical behavior during tensile and some IR images, the correlations of some AE parameters with fracture process of the two kinds of specimens were deeply analyzed, the AE feature during tensile fracture and its description of damage process was studied. The results showed that the AE energy, hits, counts, amplitude, peak value of frequency contents and so on. during tensile fracture for plate specimens could describe the corresponding damage process. This further proved the feasibility of AE monitoring and early warning application on steel structures, and some conclusions about AE parameters were gained.
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Keywords:
- Acoustic emission testing /
- V cut /
- Real-time monitoring /
- Tensile fracture /
- Damage process
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