Conclusions
Distribution curves for the probability density of the strength values of complex SVM and Terlon yarns have been investigated with variation in the clamped length of specimens from 5 to 500 mm.
The best conformity between the empirical distribution of yarn strength figures was observed for a distribution law for extreme values of the third kind, which conforms to the weak-unit theory.
With increase in clamped length, disappearance of both very large and also of very small values of yarn strength takes place and because of this a shift in the modal value of strength takes place in the direction of low values. The latter circumstance is explained by the special features in the technology of making ultrahigh-modulus yarns.
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Literature cited
A. D. Koldobskii, E. Ya. Sorokin, et al., Izv. Vuzov., Ser. “Tekhnol. Teks. Prom-sti,” No. 3, 13–16 (1982).
B. Rozen, Mechanics of Composition Strengthening, in: Fibrous Composite Materials [Russian translation], Mir, Moscow (1967), pp. 55–96.
Additional information
VNIIPV, Kiev Branch. Translated from Khimicheskie Volokna, No. 2, pp. 32–34, March–April, 1992.
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Nosov, M.P., Smirnova, V.A. & Pirogov, V.I. Statistical analysis of the scale factor in the strength of high-modulus fibres. Fibre Chem 24, 123–126 (1993). https://doi.org/10.1007/BF00555029
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DOI: https://doi.org/10.1007/BF00555029