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A method for manufacturing a composite material porosity comparison test block

A technology for comparing test blocks and manufacturing methods. It is applied in the analysis of materials, material analysis using sound waves/ultrasonic waves/infrasonic waves, and measuring devices. It can solve problems such as areas that cannot be prepared, and achieve convenient uniformity, easy size, and porosity distribution. uniform effect

Active Publication Date: 2017-10-13
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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Examples

Experimental program
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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 method for manufacturing a composite material porosity comparison test block, comprising the steps of: (1) designing a layer of prepreg according to the thickness requirements of the porosity comparison test block, and evenly spraying a portion of the prepreg on each layer Glass microspheres; (2) Put the paved parts into the autoclave for curing, trim the cured parts to form a comparison test block, and then conduct ultrasonic non-destructive testing on the comparison test block to determine the comparison test block (3) Prepare a porosity test plate containing real pore defects, use an ultrasonic flaw detector to detect the test plate, and find the same area in the test plate as the ultrasonic attenuation signal of the comparison test block in step (2) , and make a good mark; (4) carry out metallographic microscopic analysis to the area selected in step (3), and determine the numerical value of porosity.

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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Patent Type & Authority Patents(China)
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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