MONITORING GROWTH OF CLOSED FATIGUE CRACK USING SUBHARMONIC PHASED ARRAY

被引：12

作者：

Ohara, Y. ^{[1
]}

Endo, H. ^{[1
]}

Hashimoto, M. ^{[1
]}

Shintaku, Y. ^{[1
]}

Yamanaka, K. ^{[1
]}

机构：

[1] Tohoku Univ, Dept Mat Proc, Sendai, Miyagi 9808579, Japan

来源：

REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLS 29A AND 29B | 2010年 / 1211卷

关键词：

Crack Growth Monitoring; subharmonic Waves; SPACE; Closed Cracks; Nonlinear Ultrasound; NONLINEARITY;

D O I：

10.1063/1.3362519

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

To ensure the safety and reliability of atomic power plants and airplanes, the technique of monitoring closed fatigue cracks is requisite. Here we monitored the distribution of the crack depths and closure behavior in the length direction after 48000 and 87000 fatigue cycles using subharmonic phased array for crack evaluation (SPACE). The crack depths in the subharmonic images were larger than those in the fundamental images. Specifically, the difference was larger at near the side surface than at the center. The percentage of the closed part varied with the crack growth in the specimen. In addition, we fabricated shoe for SPACE to facilitate mechanical scanning. Thus, it was demonstrated that SPACE is useful in monitoring closed fatigue crack growth.

引用

页码：903 / 909

页数：7

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