EXCITATION OF HORIZONTALLY POLARIZED SHEAR ELASTIC-WAVES BY ELECTROMAGNETIC TRANSDUCERS WITH PERIODIC PERMANENT-MAGNETS

被引：92

作者：

VASILE, CF

THOMPSON, RB

机构：

[1] Rockwell International Science Center, Thousand Oaks

来源：

JOURNAL OF APPLIED PHYSICS | 1979年 / 50卷 / 04期

关键词：

D O I：

10.1063/1.326265

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Theoretical and experimental results obtained with a new type of noncontact electromagnetic transducer are presented. The transducer differs from previous configurations in that a periodic permanent magnet and an axially wound coil are combined to produce a transversely directed periodic surface stress. It is demonstrated that this configuration can be used to generate horizontally polarized shear waves traveling along, or at a predetermined angle to, the surface of a thick metal object, horizontally polarized shear modes of a thin plate, or torsional waves in a tube. A model is presented for the radiation resistance of the transducer in semi-infinite samples and plates and supporting experiments are reported. Some advantages of this transducer in ultrasonic nondestructive evaluation of structural materials are summarized.

引用

页码：2583 / 2588

页数：6

共 15 条

[1]

AULD BA, 1973, ACOUSTIC FIELDS WAVE, V2, P161

[2]

DOBBS ER, 1975, PHYSICAL ACOUSTICS, V10

[3]

Felsen L. B., 1972, RAD SCATTERING WAVES

[4]

FORTUNKO CM, 1977, 7TH NAT FALL C AM SO