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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (3): 1063-1073.

所属专题: 陶瓷

• 陶瓷 • 上一篇    下一篇

平纹SiC纤维织物剪切性能

侯耀晟树1, 郭纬愉1, 杜永龙1, 张毅2, 张大旭1   

  1. 1.上海交通大学船舶海洋与建筑工程学院,上海 200240;
    2.西北工业大学超高温结构复合材料重点实验室,西安 710072
  • 收稿日期:2022-11-21 修订日期:2023-01-05 出版日期:2023-03-15 发布日期:2023-03-31
  • 通信作者: 张大旭,博士,教授。E-mail:daxu.zhang@sjtu.edu.cn
  • 作者简介:侯耀晟树(1994—),男,硕士研究生。主要从事纤维织物力学行为的研究。E-mail:372551306@qq.com
  • 基金资助:
    国家自然科学基金(12072192,U1831105,51802263)

Shear Properties of Plain Weave SiC Fiber Fabrics

HOU Yaoshengshu1, GUO Weiyu1, DU Yonglong1, ZHANG Yi2, ZHANG Daxu1   

  1. 1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;
    2. Science and Technology on Thermostructural Composite Materials Laborary, Northwestern Polytechnical University, Xi’an 710072, China
  • Received:2022-11-21 Revised:2023-01-05 Online:2023-03-15 Published:2023-03-31

摘要: SiC纤维织物是耐高温陶瓷基复合材料的一种重要增韧材料。本文以平纹SiC纤维织物为研究对象,开展了单轴拉伸试验和±45°偏轴拉伸试验,得到了其拉伸和剪切性能;进行了纱线抽出试验,得到其经纬纱线间的摩擦系数;通过X射线CT检测,得到其细观结构;利用最小二乘法拟合出经纬纱线的横截面和卷曲形状曲线;通过建立纱线的简支梁模型,计算出剪切变形中经纬纱线摩擦力矩,预测了平纹SiC纤维织物的剪切应力-应变曲线。剪切变形过程分为纯剪和纱线挤压阶段,两个阶段的交界点为织物的锁紧角。研究结果对设计和制备平纹SiC纤维织物预制体具有参考价值。

关键词: 拉伸试验, 剪切性能, SiC纤维, 锁紧角, 平纹织物, 纱线抽出

Abstract: SiC fiber fabric is an important toughening material for high temperature resistant ceramic matrix composites. In this paper, plain weave SiC fiber fabrics were taken as the research object. The uniaxial tensile test and ±45° off-axis tensile test were carried out to obtain tensile and shear properties. Yarn extraction test was performed to obtain the friction coefficient between the warp direction and weft direction yarns. X-ray computed tomography (CT) scan was carried out to obtain miscrostructure, and the cross-section and crimp shape of the warp direction and weft direction yarns were fitted by the least squares method. The simply beam model of the yarn was established to calculate the friction moment of the yarn under shearing process, and the shear stress-strain curve of plain weave SiC fiber fabrics can be predicted. The shearing process of plain weave SiC fiber fabrics is divided into two stages, the pure shearing stage and the yarn extrusion stage, and the junction point of the two stages can be defined as the locking angle of plain weave SiC fiber fabrics. The results have reference value for the subsequent design and preparation of plain weave SiC fiber fabric preforms.

Key words: tensile test, shear property, SiC fiber, locking angle, plain weave, yarn extraction

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