张 平, 桂良进, 范子杰. 三向编织复合材料弹性性能研究[J]. 工程力学, 2009, 26(1): 31-036.
引用本文: 张 平, 桂良进, 范子杰. 三向编织复合材料弹性性能研究[J]. 工程力学, 2009, 26(1): 31-036.
STUDY ON THE ELASTIC PROPERTIES OF TRIAXIALLY BRAIDED COMPOSITES[J]. Engineering Mechanics, 2009, 26(1): 31-036.
Citation: STUDY ON THE ELASTIC PROPERTIES OF TRIAXIALLY BRAIDED COMPOSITES[J]. Engineering Mechanics, 2009, 26(1): 31-036.

三向编织复合材料弹性性能研究

STUDY ON THE ELASTIC PROPERTIES OF TRIAXIALLY BRAIDED COMPOSITES

  • 摘要: 基于均匀应变假设和界面连续性条件,并考虑到编织向纤维束波动周期在特定区域沿着自身横向的渐变,建立了一种分析三向编织复合材料弹性性能的理论预测方法。对比理论分析和实验研究结果,验证了理论预测方法的正确性。参数研究表明:在同一纤维体积分数条件下,随着编织角的增大,纵向弹性模量逐渐减小而横向弹性模量逐渐增大,面内剪切弹性模量和泊松比先增大后减小(分别在约50°和35°时达到最大值);随着轴向纤维束与编织向纤维束大小之比的增大,纵向弹性模量逐渐增大,而横向弹性模量、面内剪切弹性模量和泊松比逐渐 减小。

     

    Abstract: Based on the iso-strain and interfacial continuities conditions, a theoretical method is proposed to predict the elastic properties of triaxially braided composites concerning the variation of the braid yarn’s undulation period along its transverse direction in particular areas. The theoretical method was verified by comparing the analytical results with the test results. Parametric studies are conducted in the same fiber volume fraction. It is found that: 1) Increasing the braid angle leads to the decreasing of the longitudinal modulus and the increasing of the transverse modulus. 2) The in-plane shear modulus peaks when the braid angle approaches 50°; Poisson’s ratio peaks when the braid angle approaches 35°. 3) Increasing the axial yarn size relative to braid yarn size leads to the increasing of the longitudinal modulus, the decreasing of the transverse modulus, the in-plane shear modulus and Poisson’s ratio.

     

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