Electrical measurement method of static friction force on rough surface

Author:

Yang Jingyun1ORCID,Zhao Hang234ORCID,Ta Wurui234ORCID

Affiliation:

1. School of Civil Engineering and Transportation, Northeast Forestry University 1 , Harbin 150040, People’s Republic of China

2. Institute of Superconductor Mechanics, Lanzhou University 2 , Lanzhou 730000, People’s Republic of China

3. Department of Mechanics and Engineering Science, College of Civil Engineering and Mechanics, Lanzhou University 3 , Lanzhou 730000, People’s Republic of China

4. Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, Lanzhou University 4 , Lanzhou 730000, People’s Republic of China

Abstract

Friction plays a key role in the assessment of the safety and stability of mechanical systems (such as superconducting magnet quench explosion, aerospace vehicle bearing wear, etc.). Due to the closeness of the interfaces in engineering structures and the randomness of the contact surfaces, existing methods for measuring static friction force are unable to measure it at the contact interfaces of engineering structures under service conditions. In this paper, a new method for measuring the static friction force at the interface based on electrical signals is proposed. This method enables the measurement of the static friction force at interfaces of complex engineering structures under service conditions solely through electrical signals. The results indicate that the contact resistance gradually decreases with the increase in tangential load during the static friction stage until a monotonic behavior of macroscopic sliding occurs. The evolution of contact resistance is linked to the evolution of the real contact area, and this monotonic behavior can be explained as the deformation form of contact points. The accuracy of the proposed electrical measurement method is verified by comparison with experimental results (with an error of less than 9%). The indirect measurement method of friction force proposed in this paper can effectively measure the static friction force at the interfaces of engineering structures under service conditions, and it is expected to be applied to the detection of friction performance at engineering structure interfaces in extreme service environments.

Funder

National Natural Science Foundation of China

the National Key R&D Program of China

State Key Laboratory Project of Geohazard Prevention and Environment Protection

the Young Scientific and Technological Talent Support Project of Gansu

the Lanzhou Science and Technology Support Project

the Fundamental Research Funds for the Central Universities

the 111 Project

Publisher

AIP Publishing

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