&nbsp;Acoustic Emission Characteristics of Q235B Steel Plates on Tensile Damage Testing

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (15) : 156-161.

Acoustic Emission Characteristics of Q235B Steel Plates on Tensile Damage Testing

1.江苏省特种设备安全监督检验研究院南通分院南通 226011；#br# 2.东南大学机械工程学院南京 211189

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Abstract

Two Q235B tensile plate samples with and without weld joint are fabricated and their tensile damage properties are monitored by using acoustic emission technology (AET). Based on the loading history curves and the material damage acoustic emission signal during the tensile test, and combined with the metal material mechanical behavior, the acoustic emission characteristics during the plastic yielding, deformation strengthening and fracture of material damage stages are obtained by the analysis of AE amplitude, ringing counts and energy parameter. The AE parameters distribution range of different damage phase is also preliminarily gained by the impact statistical analysis on AE amplitude and energy parameter. It is discovered that the effects of welding on the material mechanical properties can be well described with AE characteristics by contrastive analysis of two tensile samples, and the yield process of welding area can be reflected in the "twin peaks" distribution of AE parameters from the microscopic aspect. Reference data for the crane structure condition monitoring with AET can be provided by this test.

Key words

Acoustic Emission / Q235B / Tensile Test / Damage Pattern

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Zhang Yihui1 Zhang Wenbin2 Xu Feiyun2 Zhang Yanbing1 Jiang Yu2. Acoustic Emission Characteristics of Q235B Steel Plates on Tensile Damage Testing[J]. Journal of Vibration and Shock, 2015, 34(15): 156-161

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