Determination of the Service Life of Blood Pumps for Pneumatic Ventricular Assist Systems by Mathematical Modeling of the Stress–Strain State of the Moving Diaphragm

This report presents results of calculations of the service life of blood pumps based on energy criteria of dissipative failure for pneumatic ventricular assist systems. Calculations were carried out using mathematical modeling of the stress–strain state of diaphragms of thicknesses 0.3 and 0.5 mm....

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Bibliographic Details
Published in:Biomedical engineering 2021-03, Vol.54 (6), p.416-420
Main Authors: Belyaev, L. V., Zhdanov, A. V., Dovbysh, N. S.
Format: Article
Language:English
Subjects:
Biomaterials
Biomedical and Life Sciences
Biomedicine
Blood pumps
Diaphragms
Engineering
Mathematical models
Residual strength
Safety factors
Service life assessment
Strain
Thickness
Ventricle
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Summary:This report presents results of calculations of the service life of blood pumps based on energy criteria of dissipative failure for pneumatic ventricular assist systems. Calculations were carried out using mathematical modeling of the stress–strain state of diaphragms of thicknesses 0.3 and 0.5 mm. The effects of diaphragm thickness on service life were assessed using symmetrical and sawtooth loading cycles. The amplitudes of the maximal equivalent stress and the coefficients of residual strength (safety factor) for different diaphragm thicknesses were determined.
ISSN:0006-3398
1573-8256
DOI:10.1007/s10527-021-10052-8