Abstract
The scale effect of the acoustic Young's modulus E of oriented polymer fibers has been experimentally revealed. If the fiber length L is smaller than its critical value L0, the modulus decreases proportionally to the logarithm of the fiber length. An increasing temperature causes a proportional increase in the slope dE/d(In L). The scale effect is explained by the influence of the specimen volume on the probability of initiation of intense thermal fluctuations, which cause a decline in the Young's modulus.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 34, No. 6, pp. 839–846, November–December, 1998.
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Bronnikov, S.V., Kuzmicheva, O.S. & Vettegren, V.I. Scale effect of Young's modulus of highly oriented polymers. Mech Compos Mater 34, 595–600 (1998). https://doi.org/10.1007/BF02254670
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DOI: https://doi.org/10.1007/BF02254670