二维与三维机织复合材料面内力学性能对比

doi:10.7527/S1000-6893.2023.28267

Abstract

Abstract:

2D and 3D woven composites with the same structure form and weaving process parameters were designed and prepared. Tensile， compressive and in-plane shear tests were systematically carried out by the digital image correlation method. The mechanical properties， carrying and failure mechanism of 2D and 3D woven composites were studied in combination with the evolution of surface strain field and fracture morphology. It is shown that the interlocking of warp yarns between layers significantly influences the macroscopic mechanical behavior and carrying mechanism of woven composites. 3D woven composite exhibits better structural integrity and weft mechanical properties at the expense of decrease in warp mechanical performance. Furthermore， the warp tensile strain-stress curves of 3D woven composites have a typical characteristic of nonlinearity. The constraint between warp yarn and weft yarn leads to the weak interface between fiber and matrix， which reduces the in-plane shear capacity of 3D woven composite.

Key words: 2D woven composites, 3D woven composites, mechanical properties, failure mechanism, layer-to-layer interlock structure

CLC Number:

V258

Yang SUN, Jian HUANG, Chenchen HAN, Zhenqiang ZHAO, Haili ZHOU, Fangfang SUN, Chao LI, Chao ZHANG, Liquan ZHANG. Comparison of in-plane mechanical properties of 2D and 3D woven composites[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(18): 428267.

Figures/Tables 22

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References 21

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机织构型	经纱规格	纬纱规格	经纱密度/（根·cm^-1）	纬纱密度/v	经纱层数	纬纱层数	厚度/mm	体积分数/%
二维机织层合结构	6K	12K	10	4	7	7	5.0	58.37
三维机织结构	6K	12K	10	4	7	8	5.2	59.82

机织结构	加载方向	弹性模量		拉伸强度
机织结构	加载方向	均值/GPa	离散系数/%	均值/MPa	离散系数/%
二维机织层合结构	经向	58.19	3.22	904.64	5.86
二维机织层合结构	纬向	51.54	3.46	1 102.46	2.75

三维机织结构	经向	41.52	4.08	567.64	3.00
三维机织结构	纬向	62.92	0.91	1 125.09	3.64

机织结构	加载方向	弹性模量		压缩强度
机织结构	加载方向	均值/GPa	离散系数/%	均值/MPa	离散系数/%
二维机织层合结构	经向	61.83	3.10	359.97	3.55
二维机织层合结构	纬向	53.89	2.51	564.16	7.32

三维机织结构	经向	32.93	8.55	169.35	1.49
三维机织结构	纬向	64.93	1.21	523.71	7.65

机织结构	模量/GPa	离散系数/%	强度/MPa	离散系数/%
二维机织层合结构	5.51	5.41	74.42	6.54
三维机织结构	4.72	2.31	71.12	4.67

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Comparison of in-plane mechanical properties of 2D and 3D woven composites

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