About the Authors

Shibo Wang

wangshb@cumt.edu.cn

Affiliations School of Mechanical and Electronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, 221116, China, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

Chengchao Niu

Affiliation School of Mechanical and Electronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu Province, 221116, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SW CN. Performed the experiments: SW CN. Analyzed the data: SW CN. Contributed reagents/materials/analysis tools: SW. Wrote the paper: SW CN. Developed the Torsion friction model: SW.