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COMPUTER DATA ACQUISITION OF SINUSOID ALLY VARYING STRESS AND STRAIN
Author(s) -
KOROLCZUK J.,
ROIGNANT M.,
MAUBOIS J.L.
Publication year - 1985
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.1985.tb00686.x
Subject(s) - microcomputer , viscoelasticity , stress (linguistics) , amplitude , materials science , shear stress , strain (injury) , acoustics , phase (matter) , data acquisition , computer science , physics , composite material , optics , telecommunications , medicine , chip , linguistics , philosophy , quantum mechanics , operating system
A personal microcomputer (Apple II plus) was applied to a dynamic viscometer (Low Shear 30 sin.) through the interface: analog digital converter (fiMAC‐4000) to acquire the data of sinusoidally varying stress and strain. The program allows saving of up to 5000 individual recordings of time (in milliseconds), strain and stress (in millivolts) per disk side. The accuracy of the system is ± 1 ms and ± 0.1 mV. The delay between two successive recordings could be established between 0.25 s and 1000 s. Ten to twenty records per cycle are sufficient to reproduce the data with an accuracy better than 0.5%. Accuracies of determination of frequency and of phase angle on one side and of amplitude of stress and strain on the other side could be better than 0.5% and 0.3%, respectively. The program permits changes in viscoelastic properties as a function of time or frequency.