supported by National Natural Science Foundation of China (Grant No. 10602004,Grant No. 50975006);Beijing Municipal Natural Science Foundation of China (Grant No. 2072003);Beijing Municipal Talent Developing Project of China (Grant No.20081B0501500173);Beijing Municipal Nova Program of China(Grant No. 2008A015)
Ultrasonic guided wave inspection is an effective non-destructive testing method which can be used for stress level evaluation in steel strands.Unfortunately the propagation velocity of ultrasonic guided waves changes...
supported by the National Natural Science Foundation of China(No.10602004);Beijing Natural Science Foundation(No.2072003);Beijing Talent Developing Project(No.20081B0501500173).
Propagation characteristics of high order longitudinal modes of ultrasonic guided waves in seven-wire steel strands are investigated theoretically and experimentally. According to these analysis results, proper longit...