Three-dimensional braided materials based on space group p4 symmetry

A three-dimensional weaving and space group technology, which is applied in the direction of braids, textiles and papermaking, can solve the problems of high process cost, optimize the performance of composite materials, and low processing efficiency, and achieve simple weaving process methods, excellent mechanical properties, and geometric structures. solid effect

Inactive Publication Date: 2017-01-18
HENAN UNIV OF SCI & TECH
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Problems solved by technology

However, due to the constraints of processing technology and other factors at this stage, the variety of three-dimensional braided composite materials is too small, the processing efficiency is low, and the process cost is high, which is not conducive to optimizing the performance of composite materials.
In order to obtain 3D braided composite materials with better comprehensive performance, it is urgent to develop more 3D weaving processes, and the research work on the prediction of new 3D weaving methods is still in its infancy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Three-dimensional braided materials based on space group p4 symmetry
  • Three-dimensional braided materials based on space group p4 symmetry
  • Three-dimensional braided materials based on space group p4 symmetry

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Embodiment Construction

[0044] The following describes the space group-based of the present invention with reference to the accompanying drawings The specific implementation of the symmetrical three-dimensional braided material: the unit in the braided material refers to the representative volume unit. In this article and in the claims It stands for the same meaning as P4.

[0045] 1. A three-dimensional braided geometric structural unit that satisfies the symmetry of point group 4

[0046] In three-dimensional coordinate system xyz Suppose the z axis is the rotation axis, and the group elements satisfying the knitting point group 4 are (or ), the four rotation operations in point group 4, Is the generator of point group 4, which is considered to be around Shaft turned The rotation of the angle corresponds to the matrix of the group elements of point group 4 as follows

[0047] , ,

[0048] , .

[0049] The rotational symmetry operation corresponding to the group elements of space point group 4 is ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a three-dimensional braided material based on space group P4 symmetry. According to the braided material, a novel three-dimensional braided geometric structure meeting the space group P4 symmetry and derived by taking representative volume elements meeting point group 4 symmetry as basic structural units is adopted to analyze the motion law of a yarn carrier in a braiding process, and the novel three-dimensional braided material variety having higher fiber volume percentage than the traditional three-dimensional braided material is obtained through research on the technology feasibility and prediction of the fiber volume percentage of the corresponding three-dimensional braided fabric. Meanwhile, the braiding technological method is simple and convenient to implement, the geometric structure of the obtained three-dimensional braided material is more stable, and the mechanical properties are excellent.

Description

Technical field [0001] The invention relates to the technical field of three-dimensional braided materials, in particular to a space group-based Symmetrical three-dimensional woven material. Background technique [0002] Because of its high specific strength, specific modulus, high damage tolerance, fracture toughness, impact resistance, no delamination, crack resistance and fatigue resistance, three-dimensional braided composite materials have been used in high-temperature structures such as aviation and aerospace. It has been widely used and continuously expanded to the medical, sports, automotive and other industries. However, due to the constraints of processing technology and other factors at this stage, there are too few varieties of three-dimensional braided composite materials, low processing efficiency and high process cost, which are not conducive to optimizing the performance of composite materials. To obtain three-dimensional braided composite materials with better ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04C1/06
Inventor 马文锁马振宇贾晨辉李聚波范卫锋张玲玲
Owner HENAN UNIV OF SCI & TECH
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