About the Authors

Yuzhe Liu

Affiliation Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Xinming Qiu

qxm@tsinghua.edu.cn

Affiliation Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Xiong Zhang

Affiliation Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

T. X. Yu

Affiliations Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, Y.K. Pao Chair Professor, Ningbo University, Ningbo, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TXY XQ. Performed the experiments: YL. Analyzed the data: YL XQ. Contributed reagents/materials/analysis tools: XZ. Wrote the paper: YL XQ.