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Rigidity predicting method for 2.5-D woven composite

A technology of composite materials and prediction methods, applied in special data processing applications, instruments, electrical digital data processing, etc. Effect

Inactive Publication Date: 2016-07-27
JIANGSU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing double-section hypothesis model has a rectangular-biconvex lens model, and the failure criterion based on the one-way plate strength theory cannot be used in the subsequent strength prediction
In the existing research work, the researchers discretized the buckled fiber bundle into many micro-segments (units), established a local coordinate system along the tangent direction of each unit trajectory, and carried out material properties under the local coordinate system of each unit. Assignment and unit failure judgment, the process is cumbersome and the amount of calculation is large

Method used

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  • Rigidity predicting method for 2.5-D woven composite
  • Rigidity predicting method for 2.5-D woven composite
  • Rigidity predicting method for 2.5-D woven composite

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Embodiment Construction

[0044] figure 1 It is a structural schematic diagram of the 2.5-dimensional woven composite material of the present invention, figure 1 (a) is the warp cross-section and weft direction diagram of the shallow cross-bending structure of the 2.5-dimensional woven composite material in the present invention, figure 1 (b) is the weft cross-section and warp direction diagram of the 2.5-position woven composite material shallow cross-bending structure in the present invention, figure 2 It is a solid model figure of 2.5 woven composite fiber bundle yarn systems in the present invention, image 3 is a 2.5-bit woven composite material structural unit cell diagram in the present invention, Figure 4 It is a schematic diagram of the structure of the 2.5-position woven composite material yarn in the present invention, Figure 5 is the warp local coordinate diagram in the present invention, Figure 6 is the local coordinate diagram of the weft yarn in the present invention, Figure 7 ...

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Abstract

The invention relates to the technical field of composites, in particular to a rigidity predicting method for a 2.5-D woven composite. The 2.5-D woven composite is prepared from a yarn system and resin, wherein the yarn system comprises warp yarns and weft yarns. With one repeat unit cell formed by warp yarns, weft yarns and resin as a study object, a rectangle-hexagon mesoscopic geometric model is established, and an integral coordinate system is established based on the model; besides, the rigidity of the 2.5-D woven composite is measured with an ANSYS finite element software program. The error of a prediction value obtained through the rigidity predicting method for the 2.5-D woven composite and an experiment value obtained through a composite static tensile test is within 10%, and the purposes that the geometric structure of the composite can be truly reflected, and calculation can be simplified are achieved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for predicting stiffness of 2.5-dimensional woven composite materials. Background technique [0002] The 2.5-dimensional woven composite material is a new type of high-performance composite material developed in recent years. In addition to the advantages of three-dimensional woven structure integrity and good mechanical properties in the thickness direction of the fabric, its structure also has significant advantages such as simple process methods and can meet the requirements of fabric shape and size design to the greatest extent. The expansion trend of the material field has received more and more attention. [0003] At present, there are many studies on the mesoscopic structure of 2.5-dimensional woven composite materials, and a variety of mesoscopic geometric models have been established. According to the section assumptions, they can be divided into tw...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 舒阳邱睿周金宇
Owner JIANGSU UNIV OF TECH
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