Rupture Tests of Reinforcing Fibers and a Unidirectional Laminate Using Acoustic Emissions

Experiments on the fracture testing of reinforcing fibers of composite materials and specimens of unidirectional laminates were performed using acoustic-emission diagnostics. The results were used to establish the correspondence between the fractures in the structure of polymer composite materials (...

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Bibliographic Details
Published inInstruments and experimental techniques (New York) Vol. 65; no. 2; pp. 305 - 313
Main Authors Makhutov, N. A., Matvienko, Yu. G., Ivanov, V. I., Vasil’ev, I. E., Chernov, D. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.04.2022
Springer Nature B.V
Subjects
Acoustic emission testing
Acoustics
Clusters
Composite materials
Damage accumulation
Electrical Engineering
Fracture testing
General Experimental Techniques
Laminates
Materials failure
Measurement Science and Instrumentation
Parameters
Physical Chemistry
Physics
Physics and Astronomy
Polymer matrix composites
Reinforcing fibers
Rupture tests
Structural strength
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Summary:Experiments on the fracture testing of reinforcing fibers of composite materials and specimens of unidirectional laminates were performed using acoustic-emission diagnostics. The results were used to establish the correspondence between the fractures in the structure of polymer composite materials (PCMs) at the micro-, meso-, and macroscale levels and the acoustic emission (AE) pulses recorded in this process and their energy and temporal parameters. The establishment of such phenomenological dependences makes it possible to carry out selection of the registered AE pulses, combining them into energy clusters of the lower ( L ), medium ( M ), and upper ( U ) levels, which correspond to micro-, meso-, and macroscale fractures, respectively, in the composite-material structure. By controlling the redistribution of the weight content of AE pulses ( W i ) in the energy clusters, whose total level is W L + W M + W U = 100%, in the product loading process, the damage accumulation in the structure of the PCM package at different scale levels is monitored by evaluating the residual structural strength via comparison of the current values of the parameters W i with the thresholds [ W i ] that are registered upon material failure.
ISSN:0020-4412
1608-3180
DOI:10.1134/S0020441222020014