根据纤维束脆性断裂的热波动模型预测纤维束在单轴拉力下的耐久性

IF 0.5 4区工程技术 Q4 MECHANICS

Journal of Applied Mechanics and Technical Physics Pub Date : 2024-01-15 DOI:10.1134/S002189442305019X

V. V. Shevelev

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引用次数: 0

摘要

摘要提出了一个模型，用于评估一束相同纤维在位于格里菲斯断裂阈值左侧的拉伸应力区域脆性断裂时的耐久性。结果表明，在特定应力范围内，平均耐久性和耐久性值的分散性随着拉伸应力的减小而无限增加。此外，还估算了耐久性的潜伏期、其置信概率以及能保证纤维束达到所需耐久性的相同纤维束元素数量的下限。

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PREDICTION OF DURABILITY OF A FIBER BUNDLE UNDER UNIAXIAL TENSION ON THE BASIS OF THE THERMAL-FLUCTUATION MODEL OF ITS BRITTLE FRACTURE

A model is proposed for assessing the durability of a bundle of identical fibers under brittle fracture in a tensile stress region located to the left of the Griffiths fracture threshold. It is shown that, in a specified stress range, the average durability and the dispersion of durability values increase indefinitely with a decreasing tensile stress. Estimates are obtained for the incubation period of durability, its confidence probability, and the lower limit of the number of elements of a bundle of identical fibers that guarantee the required durability of the bundle.

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来源期刊

Journal of Applied Mechanics and Technical Physics 物理-力学

CiteScore

1.20

自引率

16.70%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.