Evaluation method of surface roughness of fiber reinforced composite material

A technology of surface roughness and composite materials, applied in the direction of measuring devices, instruments, etc., can solve the problems of inaccurate, contact probe wear measurement, etc.

Inactive Publication Date: 2014-10-08
BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to overcome the defects of contact probe wear and inaccurate measurement existing in the existing contact probe measure...

Method used

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  • Evaluation method of surface roughness of fiber reinforced composite material
  • Evaluation method of surface roughness of fiber reinforced composite material
  • Evaluation method of surface roughness of fiber reinforced composite material

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Embodiment Construction

[0032] In order to make the purpose, content, and advantages of the present invention clearer, the present invention will be further described by taking the C / SiC material as an example below in conjunction with the accompanying drawings and specific testing methods and steps:

[0033] C / C, C / SiC composite materials due to the limitations of their own molding process, the porosity in the material preparation process is qualified within a certain range, and the porosity is an important factor affecting the surface roughness, in order to solve the problem of processing The influence of the surface roughness of the material, the invention proposes a new method for evaluating the surface roughness of the fiber reinforced composite material.

[0034] The C / SiC composite fiber prefabricated body used in the present invention is a three-dimensional acupuncture structure, see figure 1 As shown, 1 is the mesh tire, 2 is the X-direction fiber layup, 3 is the Y-direction fiber layup, and...

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Abstract

The invention relates to an evaluation method of surface roughness of a fiber reinforced composite material, and belongs to the technical field of material surface integrity evaluation. According to the method, firstly, a non-contact test instrument is selected and used for extracting original data of the machined surface of the material; secondly, the gross error theory is used, and filtering gross errors, namely, manufacturing defects of the material itself are filtered out; at last, analysis software is used for analyzing and processing the filtered-out data to obtain corresponding surface roughness data. Due to the fact that the manufacturing defects of the material itself are filtered out, the three-dimensional roughness data are used as evaluation data, and authentic evaluation on roughness of the machined surface of the material can be achieved.

Description

technical field [0001] The invention relates to the technical field of material surface integrity evaluation, in particular to a method for evaluating the surface roughness of fiber-reinforced composite materials. Background technique [0002] At present, C / C, C / SiC and other materials have gradually become important candidate materials for the key thermal structures of aerospace vehicles due to their good physical and chemical properties. The surface quality of composite material components is an important factor affecting component performance, yield and reliability. At present, in the design, processing and use of composite materials in China, the traditional metal material surface quality testing and evaluation methods are still used, but ordinary metal materials Some conclusions and experience of cutting surface roughness are not applicable to composite materials. This is mainly because the surface roughness evaluation method of metal materials belongs to the two-dimen...

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Application Information

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IPC IPC(8): G01B21/30
Inventor 郑景珍杨援杨宏青丁国智林琳徐宝德李昂姜涛王青
Owner BEIJING XINGHANG MECHANICAL ELECTRICAL EQUIP
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