Nondestructive Inspection of Delamination in Thin Structures by Using Lamb Wave Induced by Chirp Signal

• MIZUTANI Yoshihiro

  東京工業大学大学院理工学研究科

• INOKAWA Satoshi

  交通安全環境研究所

• KUROKAWA Yu

  東京工業大学大学院理工学研究科

• MAYUZUMI Masami

  東京工業大学大学院理工学研究科

Bibliographic Information

Other Title

• チャープ信号で励起したラム波を用いた薄肉構造物の剥離探傷
• チャープ シンゴウ デ レイキシタ ラムハ オ モチイタ ウスニク コウゾウブツ ノ ハクリ タンショウ

Abstract

In this study, usefulness of lamb waves generated by chirp signals for NDI was examined. The target for the inspection is wall parts of composite propellant tanks. We first studied characteristics of lamb waves propagated around delamination zone by computer simulation. Then, the damage inspection using lamb waves generated by chirp signals was conducted on the composite plates with artificial damaged zone. When the sensor is on the damaged zone, maximum amplitude became 17% of those at sound zone. On the other hand, when the damage zone was between two sensors, scattered lamb waves were monitored. Finally damage inspection system was developed by utilizing these characteristics of lamb waves.

Journal

• Journal of the Japanese Society for Experimental Mechanics

  Journal of the Japanese Society for Experimental Mechanics 8 (1), 65-70, 2008

  The Japanese Society for Experimental Mechanics

Keywords

• Nondestructive Evaluation
• Composite Materials
• Ultrasonic
• Scattered Lamb Waves
• Chirp Signals

Details

• CRID: 1390282680166566528
• NII Article ID: 10021155627
• NII Article ID: 130004489969
• NII Book ID: AA11822914
• DOI: 10.11395/jjsem.8.65
• ISSN: 18844219
• ISSN: 13464930
• NDL BIB ID: 9460882
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9460882
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed