Study of Non-Destructive Stress Measurements Using Acousto-elasticity

利用声弹性进行无损应力测量的研究

基本信息

批准号：
X00120----585133
负责人：
KOBAYASHI Shoichi
金额：
$ 2.5万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1980
资助国家：
日本
起止时间：
1980 至 1981
项目状态：
已结题

项目摘要

The objective of this research is to investigate the possibility and to provide a foundation for non-destructive stress measurements by use of the acousto-elasticity technique. The results are summarized as follows :A) On the utilization of the surface (Rayleigh) wave.1) We set up two types of measuring system with precision of time a) 0.2nano second by improving a commercial sing-around unit (syatem A) and b) 0.05nano second by time-of-flight measurement (system B).2) We made the transmitters and receivers of a) knife-edge type and b) wedge-type and tested.3) We investigated the effect of stresses on the variation of the phase- speed of surface waves for Alminum alloys (5152 and 2017) by the tension and the bending tests.4) The variation of the phase spied of surface waves was found to be proportional to stress. The stress-acousto-elastic coefficients are measured for the Aluminum alloys.B) On the utilization of the longitudinal wave.1) We set up a system with precision of 0.05nsec using a commercial sing-around unit.2) We made use of a commercial transmitter and receiver and one of domestic made and tested.3) We investigated the effect of stresses on the variation of the phase speed of longitudinal waves for Alminum alloys (5152 and 2017) and structural steel by the tension tests.4) The variation of the phase speed of longitudinal waves was found to be proportional to stress. The stress-acoustoelastic coefficients are determined for the Aluminum alloys and the steel. From this research. we clarified foundamentals of non-destructive stress measurements and illuminated the applicability and usefulness of the technique.

这项研究的目的是调查可能性，并通过使用声音弹性技术来实现非破坏性应力测量的基础。结果总结如下：a）关于表面（瑞利）波的利用。1）我们设置了两种类型的测量系统，具有精确时间的精度a）0.2nano第二，通过改进商业唱片单元（syatem a）和b）0.05nano乘坐时间和型号的型号。 3）我们通过张力和弯曲测试研究了应力对alminum合金（5152和2017）表面波的相位变化的影响。4）发现表面波的阶段变化与应力成比例。在使用纵向波的利用时，测量了应力 - 声音弹性系数。1）我们建立了一个精确度为0.05nSec的系统，使用商业唱片单元。2）我们利用了商业和接收器，并使用了家用和测试。通过张力测试，藻合金（5152和2017）和结构钢。4）发现纵向波的相位速度的变化与应力成正比。确定铝合金和钢的应力听觉弹性系数。从这项研究。我们阐明了非破坏性应力测量结果的创建，并阐明了该技术的适用性和实用性。