Studying the Development of a Technological Defect in Complex Stressed Construction CFRP Using Digital Image Correlation and Acoustic Emission Methods

— The work is devoted to experimentally studying regularities of inelastic strain and fracture in CFRP samples with pre-embedded technological defects corresponding to possible nonpressings and starved joints between material layers within a given bounded domain. The evolution of inhomogeneous strai...

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Bibliographic Details
Published inRussian journal of nondestructive testing Vol. 55; no. 9; pp. 631 - 638
Main Authors Lobanov, D. S., Strungar, E. M., Zubova, E. M., Wildemann, V. E.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2019
Springer Nature B.V
Subjects
Acoustic emission
Acoustic Methods
Adequacy
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composite materials
Damage accumulation
Digital imaging
Emission analysis
Fiber optics
Materials Science
Optical fibers
Strain
Structural Materials
strain
complex stressed state
digital image correlation
internal defect
acoustic emission
CFRP
fracture
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Summary:— The work is devoted to experimentally studying regularities of inelastic strain and fracture in CFRP samples with pre-embedded technological defects corresponding to possible nonpressings and starved joints between material layers within a given bounded domain. The evolution of inhomogeneous strain fields at the surface of CFRP samples with an internal starved-joint type defect in a complex stressed state is analyzed. Faulty structures were located in the composite material using the acoustic emission method. This method allowed analysis of damage accumulation processes in complex loaded samples. The experimental data will be used in further tests to assess the adequacy of signals received from embedded fiber optic sensors subjected to complex-form loads.
ISSN:1061-8309
1608-3385
DOI:10.1134/S1061830919090031