Method and device for testing shearing performance parameters of fabric

Abstract

The invention discloses a method and a device for testing shearing performance parameters of a fabric. The method comprises the following steps: acquiring geometric parameters and material parameters of the fabric; adjusting the drawing force acting on the fabric to obtain a drawing force change curve and a fabric shear angle change curve; determining a linear section shear angle interval and a nonlinear section shear angle interval according to a sudden change turning point in the fabric shear angle change curve; calculating the initial pressure between the fiber bundles according to a preset calculation formula of the initial pressure between the fiber bundles; calculating the transverse compression modulus of the fiber bundle according to a preset calculation formula of the transverse compression modulus of the fiber bundle; and constructing a constitutive relationship between the shearing performance of the fabric and the drawing force of the fiber bundle. According to the method and the device for testing the shearing performance parameters of the fabric provided by the embodiment of the invention, the constitutive relationship reflecting the shearing performance of the fabric and the drawing force of the fiber bundle is obtained, so that the simulation precision of the fabric is improved, and the forming quality of a product is further improved.

Description

technical field [0001] The invention relates to the technical field of fabric forming, in particular to a method and device for testing fabric shear performance parameters. Background technique [0002] Fiber composites have excellent mechanical properties and are widely used in the fields of automobiles, aerospace, and medical devices. In the manufacturing process of composite materials with textile fibers as reinforcements, it is often necessary to preform the textiles and then add matrix materials to form composite products. During the preforming process, the fiber bundle angle change and wrinkling phenomenon of the fabric will have a very important impact on the final product quality. Therefore, before the fabric is put into large-scale production, it is necessary to optimize the process parameters of the fabric through fabric simulation analysis. The shear performance parameter of the fabric is one of the very important parameters in the simulation analysis process. In...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a test method and device for fabric shear performance parameters to solve the technical problem of low accuracy of fabric simulation analysis, and improve the fabric quality by obtaining the constitutive relationship reflecting the shear performance of the fabric and the tensile force of the fiber bundle. Excellent simulation accuracy, avoiding wrinkling, thus improving the molding quality of the product

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