Nondestructive and noncontact characterization of bond quality in a polymer adhesive connection with zero-group velocity Lamb waves

• Project/Area Number: 25420031
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Aoyama Gakuin University
• Principal Investigator: Hideo Cho 青山学院大学, 理工学部, 教授 (60296382)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 高分子接着剤の接着性状評価 / 零群速度板波による非破壊検査 / レーザ超音波 / 接着剛性 / 数値シミュレーション / 界面接着性状 / Zero-group-velocity ラム波 / 非破壊・非接触評価 / 界面密着性状 / ラム波 / 非接触・非破壊検査 / 接着状態 / 非破壊検査 / 超音波検査 / 非接触計測

Outline of Final Research Achievements

The bonding technique with a polymer adhesive agent is expected to be one of alternative bonding technique for a metal/metal interface due to its high bonding rigidity and light weight. Nondestructive characterization of a bond quality is attempted with zero-group-velocity (ZGV) Lamb waves which have finite phase velocity. ZGV Lamb waves was generated with a pulsed YAG laser and detected with a laser interferometer. The frequencies of ZGV Lamb waves corresponding to the phase velocity of ZGV Lamb waves decreased with decreasing shear strength in the bonding area. The numerical simulation revealed that the decrease of the frequency would be caused by reduction of the rigidity on the interface between an adherent and a bonding layer. The frequency of ZGV Lamb waves would be one of good indicators of the bond quality.

Research Products

• [Journal Article] Characterization of the bond quality of adhesive plates utilizing zero-group-velocity Lamb waves measured by a laser ultrasonics technique (2015)
  • Author(s): H. Cho, Y, Yaguchi and H. ITO
  • Journal Title: Mechanical Engineering Journal Volume: Vol2 Pages: 14-00335
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Evaluation of the thickness and bond quality of three layered media using Zero-group-velocity Lamb waves (2014)
  • Author(s): H.Cho, Y. Hara and T. Matsuo
  • Journal Title: Journal of physics conference series Volume: 520 Pages: 012035-012035
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] 数値計算を用いた接着接合材におけるZero-group-velocity Lamb 波の振動形態の評価 (2015)
  • Author(s): 長 秀雄
  • Organizer: 日本機械学会 第２３回機械材料・材料加工部門講演会
  • Place of Presentation: 広島大学
  • Year and Date: 2015-11-14
• [Presentation] Characterization of the bond quality of adhesive plates utilizing zero-group-velocity Lamb waves measured by a laser ultrasonics technique (2014)
  • Author(s): H. Cho, Y, Yaguchi and H. ITO
  • Organizer: 2014 international conference on materials and processing
  • Place of Presentation: Detroit USA
  • Year and Date: 2014-06-09 – 2014-06-13