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Manufacturing method of porosity reference block for composite material

A technology for comparing test blocks and manufacturing methods, which is applied in the direction of analyzing materials, using sound waves/ultrasonic waves/infrasonic waves for material analysis, and measuring devices. effect of size

Active Publication Date: 2015-03-11
SHANGHAI AIRCRAFT MFG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to simulate the manufacture of composite material porosity comparison test blocks by pre-embedding artificial defects, so as to solve the problem that the conventional process control method cannot prepare test blocks with large area and uniform porosity

Method used

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Embodiment Construction

[0018] The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention.

[0019] The invention relates to a method for manufacturing a test block for comparing the porosity of a carbon fiber / epoxy resin matrix composite material. The specific operation steps are:

[0020] 1. Design the layup of prepreg according to the thickness requirements of the porosity comparison test block, and set the number of layers that need to be added with glass microspheres according to the number of layups. Divide the glass microspheres into several parts according to the number of layers added. During the paving process, a portion of glass microspheres is evenly sprinkled on each layer until the paving is completed. Preferably, the composition of the glass microspheres is silicon...

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Abstract

The invention provides a manufacturing method of a porosity reference block for a composite material. The manufacturing method comprises the following steps: (1) overlays of a prepreg are designed according to thickness requirements of the porosity reference block, and glass microspheres are uniformly sprayed on each overlay; (2) a paved workpiece is put into an autoclave to be solidified, the solidified workpiece undergoes trimming to form the reference block, the reference block undergoes ultrasonic non-destructive testing, and an ultrasonic decay signal of the reference block is determined; (3) a porosity test panel with real pore flaws is prepared, the test panel is detected by an ultrasonic fault detector, an area which is the same with the ultrasonic decay signal of the reference block in the Step (2) is found out in the test panel, and the area is marked; and (4) the selected area in the Step (3) undergoes metallographic microscopic analysis and numerical value of porosity is determined.

Description

technical field [0001] The invention relates to a method for manufacturing a composite material porosity comparison test block, in particular to a method for manufacturing a test block for performing porosity comparison on carbon fiber / epoxy resin-based composite materials. Background technique [0002] Carbon fiber reinforced resin matrix composites (CFRP) is a high-strength and low-weight non-metallic matrix composite material, which is increasingly widely used in aviation, aerospace, automobiles and various production and living fields. Composite parts have defects such as delamination, debonding, holes, and porosity. Defects are usually detected by ultrasonic non-destructive testing methods. [0003] Ultrasonic testing (UT) is to use the ultrasonic wave to propagate in the material to be tested, the acoustic characteristics of the material and the change of the internal structure have a certain influence on the propagation of the ultrasonic wave, and to understand the m...

Claims

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Application Information

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IPC IPC(8): G01N29/30
Inventor 刘奎张婷周晖黄姿禹张冬梅刘卫平沈瑶戚方方
Owner SHANGHAI AIRCRAFT MFG
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