Stress Measurement by Use of Surface Waves

使用表面波进行应力测量

• 批准号: 03555101
• 负责人: KOBAYASHI Shoichi
• 金额: $ 1.6万
• 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 (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555101/
• 关键词: Sing-around period measurement; Time-of-flight measurement; Acoustoelasticity; Alluminum alloy; Steel SS41; Residual stresses; Weld; Knife-edge-type transducer; 表面波; 応力音弾性係数; シングアラウンド装置; time-of-flight計測装置; 構造用鋼

In this study we intended to develope a technique for (residual) stress measurement by use of surface waves. Following results are concluded.1)On time measuring system:i)Period can be measured within 0.03nsec by of a sing-around measuring system (system A), ii)Time-of-flight can be measured within 0.05nsec (system B).2)On transducers:i)Wedge-type (W-type) and ii)Knife-edge line contact (N-type) transducers are used. A pair of W- or N-type transducers is used for the measuing system A. A pair of N-type transducers with a W-type transducers is used for the measuing system B.3)Stress acoustoelastic constants (phase velocity change ration per unit stress) are determined:a)Alluminum alloy(5052):-1.22x10^<-6>/(kgf/cm^2)(roll-direction), :-1.18x10^<-6>/(kgf/cm^2)(perpendicular to the roll direction), b)Alluminum alloy(2017):-1.24x10^<-6>/(kgf/cm^2)(roll-direction), :-1.21x 10^<-6>/(kgf/cm^2)(perpendicular to the roll direction) c)Steel(SS41):-0.209x10^<-6>/(kgf/cm^2)(roll-direction), :-0.233x10^<-6>/(kgf/cm^2)(perpendicular to the roll direction)4)On residual stress measurements: a)Accuracy of measuring system when a pair of W-type transducers is moved on a flat surface such as on a glass plate is about 0.6nsec with silicon oil used as couplant. b)Residual stresses are measured in an alluminum plate welded in the middle. The results may sugest more improvement for the measuring system.

在这项研究中，我们打算通过使用表面波来开发一种（残留）应力测量的技术。 1）按时测量系统：i）可以在0.03nSec内通过单圈测量系统（系统a），ii）在0.05nsec（系统B）.2）内测量飞行时间：一对W-或N型换能器用于测量系统A。使用W型传感器的一对N型换能器用于测量系统B.3）应力Acousto弹性常数（每单位应力相位速度变化评分）：a）合金（5052）：-1.22x10^<-6>/（kgf/cm^2）（滚动），：-1.18x10^<-6>/（kgf/cm^2）（垂直于滚动方向），b），b）alluminum alloy alloy alloy（2017） ：-1.21x 10^<-6>/（kgf/cm^2）（垂直于滚动方向）c）钢（SS41）：-0.209x10^<-6>/（kgf/cm^2）（kgf/cm^2）（滚动 - driendirection）（滚动），：-0.233x10^<-6>/cmgf/cmgf/cm^2）测量：a）当一对W型传感器在平坦的表面上移动（例如在玻璃板上）时，测量系统的精度约为0.6nsec，用用作耦合剂的硅油。 b）残留应力是在中间焊接的艾脂板中测量的。结果可能会为测量系统提供更多改进。

项目成果

小林 昭一: "弾性表面波による応力測定" 土木工学における非破壊評価シンポジウム講演論文集. 50-56 (1991)

Shoichi Kobayashi：“使用表面声波进行应力测量”土木工程无损评估研讨会论文集 50-56 (1991)。

S.Kobayashi: "Stress Measurement by Use of Rayleigh Waves" Proc.of the 3rd Intern.Conf.on Residual Stresses,Tokushima,Japan.

S.Kobayashi：“使用瑞利波进行应力测量”第三届残余应力实习会议论文集，日本德岛。

小林 昭一,呉 〓: "弾性表面波による応力測定" 土木工学における非破壊評価シンポジウム講演論文集. 51-56 (1991)

Shoichi Kobayashi, Kure：“使用表面声波进行应力测量”土木工程无损评估研讨会论文集 51-56 (1991)。

S.Kobayashi: "Stress Measurement by Usc of Rayleigh Waves" Residual Stresses III(eds.H.Fujiwara et al.).Elsevier Applied Science. 1109-1114 (1992)

S.Kobayashi：“USC 瑞利波应力测量”残余应力 III（H.Fujiwara 等人编）。爱思唯尔应用科学。

Shoichi Kobayashi: "Stress Measurement by Use of Surface Waves" Symposium on Non-Destructive Evaluation in Civil Engineering. 50-56 (1991)

Shoichi Kobayashi：“利用表面波进行应力测量”土木工程无损评估研讨会。