Experimental investigation of cut-edge effect on mechanical properties of three-dimensional braided composites

2007 ◽  
Vol 28 (9) ◽  
pp. 2417-2424 ◽  
Author(s):  
Jialu Li ◽  
Yanan Jiao ◽  
Ying Sun ◽  
Limei Wei
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Edge Effect ◽  
Three Dimensional ◽  
Braided Composites ◽  
Cut Edge

Experimental Researches on the Mechanical Properties of Three Dimensional Multidirectional Braided Composites

2009 ◽  
Vol 79-82 ◽  
pp. 1237-1240 ◽  
Author(s):  
Ying Sun ◽  
Jia Lu Li ◽  
Li Chen ◽  
Ying Shao
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Braided Composites ◽  
Fiber Volume ◽  
Cut Edge ◽  
Short Beam ◽  
Beam Shear ◽  
Strength And Stiffness ◽  
Braiding Angle

This paper investigated the mechanical properties and the relationships between fiber architecture and the composites properties of three-dimensional multidirectional braided composites made of Toray@T700 carbon fiber impregnated with TDE 86# epoxy resin using RTM. The strength and stiffness properties measured here include tension, compression, flexure and short beam shear, all of these in both the longitudinal and transverse directions. It is found that the 3D six-directional braided composites with 55 % fiber volume fraction and 25°surface braiding angle represent quasi-isotropic in-plane elastic behaviors due to their symmetric, intertwined architecture and unidirectional reinforcements in both the longitudinal and transverse directions. Compared with the tension strength and modulus, those for compressions in the same directions descend near 40% and 10% respectively. The cut-edge on the width destroys the integrity of microstructure and inevitably cuts down the carrying capacity of composites under the longitudinal tension.

Bearing Abilities and Progressive Damage Analysis of Three Dimensional Four-Directional Braided Composites with Cut-Edge

2016 ◽  
Vol 23 (4) ◽  
pp. 839-856 ◽  
Author(s):  
Bing Lei ◽  
Zhenguo Liu ◽  
Jixuan Ya ◽  
Yibo Wang ◽  
Xiaokang Li
Keyword(s):  
Three Dimensional ◽  
Progressive Damage ◽  
Damage Analysis ◽  
Braided Composites ◽  
Cut Edge

scholarly journals An Efficient Method for Geometric Modeling of 3D Braided Composites

2016 ◽  
Vol 11 (4) ◽  
pp. 155892501601100 ◽  
Author(s):  
Qi Wang ◽  
Ronghua Zhang ◽  
Jianming Wang ◽  
Yanan Jiao ◽  
Xiaohui Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Efficient Method ◽  
Geometric Modeling ◽  
Three Dimensional ◽  
Structure Design ◽  
New Method ◽  
Braided Composites ◽  
3D Braided Composites ◽  
Cad Simulation ◽  
Geometric Study

To estimate the precise mechanical properties of a three-dimensional (3D) braided composite, a geometric study is needed. Because of the complexity of the yarn paths inside the preform, the geometric modeling for 3D braided composites is always time consuming. In this paper, an efficient method, namely preform boundary reflection (PBR), is proposed for motion model construction in geometric studies. Furthermore, a CAD simulation system using novel combinations of parameters was developed for integral geometric descriptions of 3D braided preforms. Compared with the traditional method, the new method significantly simplifies the simulation process without affecting the precision of geometric structure. As a result, the structure design for composite preforms is effectively accelerated. The new method establishes a foundation for microstructure and mechanical properties analysis of preforms with complex geometric structures.

Study on the Compressive Properties of Three Dimensional Quasi-Isotropic Braided Composites

2011 ◽  
Vol 332-334 ◽  
pp. 920-923
Author(s):  
Qian Qian Zhang ◽  
Ying Sun ◽  
Ya Nan Jiao ◽  
Jia Lu Li
Keyword(s):  
Mechanical Properties ◽  
Cell Model ◽  
Three Dimensional ◽  
Regular Pattern ◽  
Unit Cell Model ◽  
Compressive Properties ◽  
Deflection Curve ◽  
Braided Composites ◽  
Linear Behavior ◽  
Load Deflection Curve

Based on the principle and fabricating process of Quasi-Isotropic braided composites, the regular pattern of movement of each yarn is analyzed and the inner unit cell model is established in this paper. The real Quasi-Isotropic braiding structure is built using 3D paint software named UG NX4.0. Compressive mechanical properties of 3D Quasi-Isotropic braided composites are also discussed. It is found that the load–deflection curve of the Quasi-isotropic braided composites displays a relatively linear behavior, behaving mostly as the characteristics of shear.

Investigation on the Bearing Abilities of Three-Dimensional Full Five-Directional Braided Composites with Cut-Edge

2016 ◽  
Vol 24 (4) ◽  
pp. 893-910 ◽  
Author(s):  
Yibo Wang ◽  
Zhenguo Liu ◽  
Bing Lei ◽  
Xiang Huang ◽  
Xiaokang Li
Keyword(s):  
Three Dimensional ◽  
Braided Composites ◽  
Cut Edge

Tensile and Bending Strengths of TR-30s Carbon Fiber Three Dimensional Braided Composites at Different Temperature

2010 ◽  
Vol 97-101 ◽  
pp. 1616-1619 ◽  
Author(s):  
Yun Fei Guo ◽  
Jian Yang ◽  
Ye Hong He ◽  
Jia Lu Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Bending Strength ◽  
Three Dimensional ◽  
Effect Of Temperature ◽  
Braided Composites ◽  
3D Braided Composites ◽  
Pass Through ◽  
Carbon Fiber Epoxy

With the development of technology, composites are used more broadly, especially at different temperature. So it is very important to research the mechanical properties of composites at different temperature. Three dimensional braided composites are new composites with high performances, in which fiber-tows are interlacing in space with multi-direction and pass through the thickness to form a no-laminated and integrated structure. However researches on the mechanical properties of three dimensional braided composites are almost at room temperature. In this paper, the tensile and bending strengths of three dimensional braided composites (TR-30s carbon fiber/epoxy) at 23 oC and 150 oC are researched respectively. The results indicate that the effect of temperature on the tensile strength and bending strength of 3D braided composites is obviously different. The average tensile strength of 3D braided composites at 150 oC is almost the same as that at 23 oC. However the average bending strength of 3D braided composites at 150 oC is mush lower than that at 23 oC. This means that the effect of temperature on different mechanical properties is different and application temperature should be taken care of when 3D braided composites bear different kind of loads.

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