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力学与实践 ›› 2000, Vol. 22 ›› Issue (2): 0-0.doi: 10.6052/1000-0879-f2000-038

• 论文 •    

含裂纹的受力试件对超声波传播路径的影响

张忠平 孙中禹   

  1. 空军工程大学理学院,西安,710051
  • 收稿日期:2008-01-14 修回日期:1900-01-01 出版日期:2000-04-10 发布日期:2000-04-10

EFFECTS OF A LOADED SPECIMEN WITH CRACK ON THE TRAVELLING OF ULTRASONIC WAVES

  • Received:2008-01-14 Revised:1900-01-01 Online:2000-04-10 Published:2000-04-10

摘要: 本文从弹性理论及断裂力学理论出发,通过含裂纹试件受力前后形状及折射率的变化,研究了超声波经含裂纹的受力试件后传播路径的变化,并与光波的变化进行了比较.得到合裂纹的受力试件对于光波来说相当于一“凹”透镜的作用,而对于超声波来说却相当于“凸”透镜的作用的结论.

Abstract: Based the theory of elasticity and that of fracture mechanics, the effect of a loaded specimen with crack on the travelling path of ultrasonic wave is studied. By comparing the result of light and ultrasonic waves, it is found that a loaded specimen with crack can be considered as a concave lens (mirror) for light wave and as a convex lens (mirror) for ultrasonic wave.