1. School of Materials Science and Engineering, School of Mechanical EngineeringShijiazhuang Tiedao University Shijiazhuang 050043 China
2. College of Civil Engineering and ArchitectureZhejiang University Hangzhou 310058 China
3. Key Laboratory of Noise and VibrationInstitute of Acoustics, Chinese Academy of Sciences Beijing 100190 China
4. Department of Materials Science and EngineeringUniversity of Washington Seattle WA 98195‐2120 USA