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GB/T 47232-2026Test method for the coefficient of friction of biomimetic structured surfaces (English PDF)

仿生结构表面摩擦系数测试方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 27, 2026

Implementation date

September 1, 2026

Scope

GB/T 47232-2026 is the English-translated version of 仿生结构表面摩擦系数测试方法.

GB/T 47232-2026 is the Chinese standard "Test method for the coefficient of friction of biomimetic structured surfaces". Its scope clause reads: This document describes a test method for the coefficient of friction of biomimetic structural surfaces.

This document applies to metals with structural feature unit dimensions in the range of 50nm to 5mm and substrate elastic modulus not less than 0.1GPa. Measurement of the surface friction coefficient of biomimetic structures made of alloys, inorganic non-metals or polymer materials. Its clauses include terms and definitions.

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Document preview — GB/T 47232-2026

National Standard of the People's Republic of China

ICS: 07.080
Classification: A 40

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

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4.Test Principles
5.Test apparatus
6.Sample Requirements
6.1 Sample Material
6.2 Sample Size
6.3 Sample Classification
6.4 Sample Preparation
7.Test conditions and test parameters
7.1 Test temperature and humidity
7.2 Lubrication conditions
7.3 Friction Head
7.4 Travel Length
7.5 Sliding direction
7.6 Normal Load
7.7 Sliding speed
8.Test Steps
8.1 Pre-test preparation and pre-test procedures
8.2 Formal Testing Steps
9.Experimental Data Processing 7.
10 Test Reports
Appendix A (Informative) Examples of Sliding Directions and Data Processing for Anisotropic Bionic Structures
Appendix B (Informative) Test Report Example

1 Scope

This document describes a test method for the coefficient of friction of biomimetic structural surfaces.

This document applies to metals with structural feature unit dimensions in the range of 50nm to 5mm and substrate elastic modulus not less than 0.1GPa.

Measurement of the surface friction coefficient of biomimetic structures made of alloys, inorganic non-metals or polymer materials.

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 17754-2012 Tribology

3 Terms and Definitions

The terms and definitions defined in GB/T 17754-2012, as well as the following terms and definitions, apply to this document.

3.1

Based on the principles of bionics, this method imitates the macroscopic, microscopic, and nanoscopic three-dimensional structural morphology, distribution patterns, and internal physical properties of the surface of living organisms.

Based on the characteristics, a new type of functional surface was designed and manufactured.

3.2 Non-smooth surfaces

On the smooth solid surface of an interfacial friction system, there exists one or more factors that cause a non-smooth surface effect.

Note. Non-smoothness effect refers to various factors within the same interfacial friction system that cause a regular change in tangential motion resistance due to the solid surface itself, including those caused by external factors.

Various environmental factors cause changes in the frictional state of this surface.

3.3

On a reference plane of the same smooth surface, it consists of geometrically similar units with regular or random distributions.

A geometrically continuous surface.

3.4

Changes in the material composition, chemical properties, or physical properties of localized areas of the surface lead to changes in the mechanical properties of the corresponding areas.

A surface exhibiting mechanical non-smoothness.

Note. Based on three-dimensional coordinates, mechanically non-smooth biomimetic structural surfaces (3.4) can be divided into mechanically non-smooth biomimetic structural surfaces (horizontal direction) and mechanically non-smooth biomimetic surfaces.

Structural surfaces are categorized into two types (vertical direction). those exhibiting mechanical non-smoothness in the horizontal and vertical directions, respectively.

Biomimetic structural surfaces that exhibit mechanical non-smoothness are not considered in this document.

3.5

In the biomimetic structural surface (3.1), there is a specific distribution pattern that can independently reflect its geometric shape or mechanical characteristics, and can realize its basic...

The smallest unit of basic functions.

......
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

GB/T 17754-2012Tribology terminology

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