On Local Stability Loss of Modified Composites with Whiskerized Fibers

G. I. Kriven, D. S. Shavelkin
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Abstract

This article examines the critical compressive stresses required for a modified fiber composite to remain straight while the fibers within it bend. It was assumed that the modified composite consists of three phases: fiber, whiskerized interfacial layer, and matrix. An example of a composite material made up of carbon fibers, a whiskerized layer of carbon nanotubes with an epoxy matrix, and an epoxy matrix was considered. Its physical parameters affecting the critical compressive stresses were assessed, and methods for determining them were proposed. The effective properties of the inclusion and binder composite material were identified using the Voigt and Reis methods. Similarly, the effective properties of the interfacial whiskerized layer were analyzed by the three-phase method. The influence of fiber wavelength and phase shift, which define the destruction of the composite material, on the critical compressive stress value was explored. The wavelengths at which the composite material is destroyed were found. The effect of the volume content of the modified inclusion on the minimum critical compressive stress value was shown. The results for the modified composites were compared with those for the classical composites with a similar volume content of inclusions.
论带须纤维改性复合材料的局部稳定性损失
本文研究了改性纤维复合材料在其内部纤维弯曲时保持平直所需的临界压缩应力。假设改性复合材料由三相组成:纤维、晶须化界面层和基体。以碳纤维、碳纳米管晶须化层与环氧树脂基体以及环氧树脂基体组成的复合材料为例进行了研究。评估了影响临界压缩应力的物理参数,并提出了确定这些参数的方法。使用 Voigt 和 Reis 方法确定了夹杂物和粘结剂复合材料的有效特性。同样,用三相法分析了界面晶须化层的有效特性。纤维波长和相移决定了复合材料的破坏程度,我们探讨了纤维波长和相移对临界压缩应力值的影响。找到了复合材料破坏的波长。研究还显示了改性成分的体积含量对最小临界压缩应力值的影响。将改性复合材料的结果与夹杂物体积含量相似的传统复合材料的结果进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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