Abstract

The influence of various kinds of stress raisers on the processes of damage accumulation, initiation, and propagation of cracks in specimens of steel St3 under uniaxial tension has been considered. The investigated samples had a central aperture with diameter of ∅ = 5 mm or a transverse weld. The results of acoustic emission diagnostics showed that, despite the different nature of the stress raisers, the loading diagrams, the nature of damage accumulation and development of main cracks, the number of recorded acoustic emission (AE) events, and the activity of their recording, as well the dynamics of changes in the weight content of location pulses (\({{W}_{i}}\)) in the energy clusters of the low, medium, and high levels were quite similar, along with the values of these parameters during sample failure.

中文翻译：

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样品破裂试验中应力产生区中损伤累积和破坏的动力学

摘要

考虑了各种应力提升剂对单轴拉伸下St3钢试样中损伤累积，萌生和裂纹扩展过程的影响。所研究的样品具有直径为∅= 5 mm的中心孔或横向焊缝。声发射诊断的结果表明，尽管应力产生器的性质不同，但载荷图，主要裂纹的损伤累积和发展的性质，已记录的声发射（AE）事件的数量以及其记录的活动，以及低，中和高能级的能量簇中位置脉冲（\（{{W} _ {i}} \\））的重量含量变化的动力学以及其值都非常相似样品失效期间的这些参数。