Method for welding glass fiber cloth

Abstract

The invention discloses a method for welding glass fiber cloth. The method comprises the following steps of: mixing glass powder into slurry, and coating the slurry between glass fiber cloth layers; adjusting a light path of ultra-short pulse laser so as to focus the ultra-short pulse laser on the glass powder between the glass fiber cloth to be welded through an objective lens; when the intensity of the ultra-short pulse laser is greater than or equal to a multi-photon absorption threshold value, and generating multi-photon absorption and ionization by the glass powder to produce seed electrons capable of absorbing laser energy; when the laser energy absorbed by the seed electrons is equal to a smelting threshold value of the glass powder, smelting the glass powder, and connecting the glass fiber cloth with the glass powder; and scanning by the ultra-short pulse laser along a pre-designed line, and welding the whole glass fiber cloth. By the method, the mechanical property of a composite material is improved; the method is suitable for automatic production; the mechanical property of a glass fiber enhanced resin-based composite material is improved; a layering phenomenon is avoided; and layering of a bidimensional laminated structure and connection of a three-dimensional prefabricated piece are realized.

Description

technical field [0001] The invention relates to the connection of glass fiber cloth, in particular to a method for welding glass fiber cloth. Background technique [0002] Glass fiber reinforced resin matrix composites have the advantages of high specific strength and specific modulus, and are widely used in many fields. However, laminated composites have weaknesses in mechanical properties due to the presence of layers: for example: easy delamination, crack sensitivity and fast damage propagation, low stiffness and strength along the thickness direction, low impact toughness and damage tolerance levels, Low in-plane shear strength. [0003] Three-dimensional braids (also known as three-dimensional preforms) can overcome the delamination phenomenon, and the overall weaving of complex-shaped parts will still use sutures to connect the three-dimensional preforms, but the mechanical properties of the suture joints will decrease. Contents of the invention [0004] The invent...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for welding glass fiber cloth, which improves the mechanical properties of the glass fiber reinforced resin matrix composite material, overcomes the delamination phenomenon, and solves the delamination and three-dimensional preforming of the two-dimensional laminated structure Please refer to the following description for details about the connection problem of the software:

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