Dynamic compressive behavior in different loading directions of 3D braided composites with different braiding angle

This research dealt with the impact properties of glass fiber reinforced composites manufactured from different structures of three-dimensional braided preforms. Three different architectures of the braid structures, 4-Direction, 5-Direction and 6-Direction, were investigated together with three further various braiding angles of each architecture. The effect of architecture and braiding angle parameters upon the impact was examined. Damage morphology of the impacted materials was characterized. It has been found that the parameters affected the damage resistance and tolerance of composites evidently. 6-Directional composites showed higher impact toughness than the others with same braiding angle. Failure of the specimens with small damage area revealed the brittle characteristic of 3D braided composite.

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Effect of Braiding Angle on the Impact and Post-Impact Behavior of 3D Braided Composites

Strength of Materials ◽

10.1007/s11223-017-9858-4 ◽

2017 ◽

Vol 49 (1) ◽

pp. 198-205 ◽

Cited By ~ 5

Author(s):

S. Yan ◽

L. Y. Guo ◽

J. Y. Zhao ◽

X. M. Lu ◽

T. Zeng ◽

...

Keyword(s):

Impact Behavior ◽

Braided Composites ◽

3D Braided Composites ◽

Post Impact ◽

Braiding Angle ◽

The Impact

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Fatigue Behavior of 3D Braided Composites Containing an Open-Hole

Polymers ◽

10.3390/polym12092147 ◽

2020 ◽

Vol 12 (9) ◽

pp. 2147

Author(s):

Shuangqiang Liang ◽

Qihong Zhou ◽

Haiyang Mei ◽

Ge Chen ◽

Frank Ko

Keyword(s):

Cross Section ◽

Fatigue Behavior ◽

Fatigue Loading ◽

Fatigue Properties ◽

Failure Behavior ◽

Braided Composites ◽

Damage Area ◽

3D Braided Composites ◽

Mechanical Performances ◽

Braiding Angle

The static and dynamic mechanical performances of notched and un-notched 3D braided composites were studied. The effect of longitudinal laid-in yarn was investigated in comparison with low braiding angle composites. The specimens were fatigue tested for up to millions of cycles, and the residual strength of the samples that survived millions of cycles was tested. The cross-section of the 3D braided specimens was observed after fatigue loading. It was found that the static and fatigue properties of low angle 3D braided behaved better than longitudinally reinforced 3D braided composites. For failure behavior, pure braids contain damage better and show less damage area than the braids with longitudinal yarns under fatigue loading. More cracks occurred in the 3D braided specimen with axial yarn cross-section along the longitudinal and transverse direction.

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A parameterized unit cell model for 3D braided composites considering transverse braiding angle variation

Journal of Composite Materials ◽

10.1177/00219983211053909 ◽

2021 ◽

pp. 002199832110539

Author(s):

Weijie Zhang ◽

Shibo Yan ◽

Ying Yan ◽

Yiding Li

Keyword(s):

Fiber Volume Fraction ◽

Volume Fraction ◽

Cell Model ◽

Unit Cell ◽

Unit Cell Model ◽

Braided Composites ◽

Fiber Volume ◽

Angle Variation ◽

3D Braided Composites ◽

Braiding Angle

In this paper, a parameterized unit cell model for 3D braided composites considering transverse braiding angle variation is proposed, to assist the mechanical characterization of such materials. According to the geometric characteristics of 3D braided composites, a method for automatically generating textile geometries based on practical braiding parameters, including the main braiding angle, the transverse braiding angle, and the fiber volume fraction, is established and implemented in a CAD software package. In this model, the addition of transverse braiding angle educes a more flexible control of fiber volume fraction distribution, and with the combination of control parameters according to the actual fiber distribution needs of users, it can suggest the appropriate parameters for the unit cell. The generated unit cell models are used in finite element analysis and the results are validated against experiments for a number of 3D braided composites in terms of fiber volume fraction and elastic constants, and good agreement is observed. Based on the parameterized unit cell model, the effects of main braiding parameters on the elastic properties of 3D braided composites are discussed.

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Prediction for Strength of 3D Braided Composites Based on Helix Geometry Model

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.387.64 ◽

2013 ◽

Vol 387 ◽

pp. 64-67

Author(s):

Li Li Jiang ◽

Xi Bin Wei ◽

Xun Liu ◽

Tao Zeng

Keyword(s):

Numerical Model ◽

Cross Section ◽

Present Model ◽

Experimental Results ◽

Micro Structure ◽

Braided Composites ◽

Geometry Model ◽

3D Braided Composites ◽

Braiding Angle ◽

Helix Geometry

A numerical model capable of calculating the strength of 3D braided composites is developed, based on the micro-structure of 3D four-directional braided composites and the assumption of the braiding yarn with a helix configuration and ellipse cross-section. The strength of 3D braided composites have been predicted through a finite multiphase element method (FMEM). Comparison was conducted for those from the present model and experiment. The results are in good agreements with the experimental results in the previous literature. The influences of braiding angle on the strength are also studied.

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