Detection and research of acoustic emission effects at a plastic strain of steels in a magnetic field

Papirov, I. I.; Stoev, P. I.

doi:10.15407/dopovidi2014.01.081

Cited by 3 publications

(2 citation statements)

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“…Improving the technical diagnostics allows not only defects to be detected and the degree of their danger to established, but also the stress-strain state of the material to be evaluated [13,14]. Under these conditions, the use of the vibroacoustic method is promising, since the diagnostic signals contain information about the dynamics of the processes [15].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Generation of Vibration Signals under Uniaxial Loading of Materials Using the Coherent Properties of Laser Radiation

Louda

Sharko

2020

Materials

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The present article describes the results of theoretical and experimental investigations of the force response of materials to external tensile stresses. The method used is based on remote precision measurements of the amplitudes of the harmonics of vibration signals and synchronous fixation of deformations under load. It was determined that the shape of the propagating acoustic signal depends not only on the bias time, but also on the frequency. In addition, fixation of the moments of occurrence of the vibrational signals and determination of the number of excesses in the amplitudes of harmonics over the discrimination level allows structural models to be studied in order to diagnose the strength properties of materials under dynamic loading of solids. The experimental setup consisted of a P100 Labtest-2 tearing machine providing a loading speed of 6.22 mm/min, a Polytech PSV–400 vibrometer including lasers, and a computer. Measurements were made at frequencies of 0.4, 1.6, and 40 kHz. An analysis of the mathematical models of the occurrence and propagation of acoustic signals in a material under load is presented, and the features of their application are reported. Transferring the moments of occurrence of vibrational signals to a strain diagram from the applied load allows the development of physical processes of hardening and destruction of materials to be traced. The occurrence of vibrational signals under load can be used as an information parameter for the diagnosis of developing defects in the structure of materials under load.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Generation of Vibration Signals under Uniaxial Loading of Materials Using the Coherent Properties of Laser Radiation

Louda

Sharko

2020

Materials

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“…анализ публикаций по обозначенной проблеме показывает, что связь между процессом образования дефектов и наличием сигналов аЭ позволяет определять степень работоспособности материала при изменяющихся условиях эксплуатации изделий [1,2], уровень напряжений и деформации материала [3], обнаруживать дефекты [4], определять их координаты, оценивать степень их опасности [5]. проблемные вопросы изучения явления аЭ освещены в работах [6][7][8], однако в них не акцентируется внимание на причинах и механизмах зарождения источников аЭ.…”

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