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GB/T 46910.2-2025Non-destructive testing - Acoustic vibration testing of resin matrix composite parts - Part 2: Mechanical impedance testing (English PDF)

无损检测　树脂基复合材料制件的声振检测　第2部分：机械阻抗法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

December 31, 2025

Scope

GB/T 46910.2-2025 is the English-translated version of 无损检测　树脂基复合材料制件的声振检测　第2部分：机械阻抗法.

GB/T 46910.2-2025 is the Chinese standard "Non-destructive testing - Acoustic vibration testing of resin matrix composite parts - Part 2: Mechanical impedance testing".

Its scope clause reads: This document describes a mechanical impedance testing method for the internal quality of resin-based composite parts based on acoustic vibration detection, and specifies the mechanical impedance...

General requirements for anti-detection methods, testing procedures, testing records and reports, etc. This document applies to the testing of resins in laminated structures, sheet/sheet adhesive structures, and sandwich structures of carbon fiber, glass fiber, and blended fiber materials.

For delamination or debonding of composite material parts, the mechanical impedance method should be performed in accordance with the same procedure for other materials or structures. Its clauses include terms and definitions.

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Document preview — GB/T 46910.2-2025

National Standard of the People's Republic of China

ICS: 19.100
Classification: J 04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4.Method Principles
5 General Requirements
6.Testing Steps
7.Testing Records and Reports 8.
Appendix A (Informative) Selection of Discontinuous Artificial Manufacturing Methods
Appendix B (Informative) Methods for Discontinuous Artificial Production

1 Scope

This document describes a mechanical impedance testing method for the internal quality of resin-based composite parts based on acoustic vibration detection, and specifies the mechanical impedance...

General requirements for anti-detection methods, testing procedures, testing records and reports, etc.

This document applies to the testing of resins in laminated structures, sheet/sheet adhesive structures, and sandwich structures of carbon fiber, glass fiber, and blended fiber materials.

For delamination or debonding of composite material parts, the mechanical impedance method should be performed in accordance with the same procedure for other materials or structures.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 20737 General Terms and Definitions for Nondestructive Testing

GB/T 44525 Specification for Comparative Test Blocks of Resin-Based Composite Material Parts by Ultrasonic Testing in Non-Destructive Testing

3 Terms and Definitions

The terms and definitions defined in GB/T 20737 and the following terms and definitions apply to this document.

3.1

A non-destructive testing method that uses vibration excitation on the test piece to detect the quality of the workpiece.

3.2

A method for inspecting the quality of a workpiece by using continuous wave excitation to vibrate the workpiece and analyzing the vibration response of the workpiece.

Note. This includes resonance detection technology and mechanical impedance analysis detection technology.

3.3

This technology enables the quality inspection of manufactured parts by analyzing the complex impedance changes at the resonant point of the inspection system, which includes the inspected part.

Note. The resonant probe is excited at a specific frequency to operate at its optimal resonance point. The complex impedance of the detection system's resonance point is analyzed by examining the effect of load changes on the tested component.

The change enables the inspection of the quality of manufactured parts.

3.4

This technology enables the quality inspection of manufactured parts by analyzing changes in the amplitude of mechanical impedance.

Note. A sweep frequency excitation is applied to the test piece to obtain the frequency at which the mechanical impedance difference between the good and defective regions is greatest. The amplitude of the mechanical impedance of the test piece at this frequency is then analyzed.

The change in degree enables the inspection of the quality of the manufactured parts.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

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