An Automated Optical Strain Measurement System for Estimating Polymer Degradation under Fatigue Testing; Sensors; Vol. 22, iss. 16

An Automated Optical Strain Measurement System for Estimating Polymer Degradation under Fatigue Testing; Sensors; Vol. 22, iss. 16

Bibliographic Details
Parent link:Sensors.— .— Basel: MDPI AG
Vol. 22, iss. 16.— 2022.— Article number 6034, 20 p.
Other Authors: Bogdanov A. A. Aleksey Alekseevich, Panin A. V. Alexey Viktorovich, Lyubutin P. S. Pavel Stepanovich, Eremin A. V. Alexandr Vyacheslavovich, Buslovich D. G. Dmitry Gennadjevich, Byakov A. V. Anton Viktorovich
Summary:Title screen
Background: this study deals with design of an automated laboratory facility based on a servo-hydraulic testing machine for estimating parameters of mechanical hysteresis loops by means of the digital image correlation (DIC) method. (2) Methods: the paper presents a description of the testing facility, describes the grounds for calculating the elastic modulus, the offset yield strength (OYS) and the parameters of the mechanical hysteresis loops by the DIC method. (3) Results: the developed hardware-software facility was tested by studying the fatigue process in neat polyimide (PI) under various amplitude tension-tension loadings. It was found that the damage accumulation was accompanied by the decrease in the loop areas, while failure occurred when it reduced by at least ~5 kJ/m3. (4) Conclusions: it was shown that lowering the loop area along with changing the secant modulus value makes it possible to estimate the level of the scattered damage accumulation (mainly at the stresses above the OYS level). It was revealed that fractography data, namely the pattern and sizes of the fatigue crack initiation and propagation zones, did not correlate well with the dependences of the parameters of the hysteresis loops
Текстовый файл
Language:English
Published: 2022
Subjects:
digital image correlation method
hysteresis loop
polymer fatigue; polyimide
cyclic load
mechanical properties
электронный ресурс
труды учёных ТПУ
Online Access:https://doi.org/10.3390/s22166034
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=685543

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