Accession Number:

ADA184823

Title:

NDE (Nondestructive Evaluation) of Adhesive Bonds. Phase 1.

Descriptive Note:

Final rept. 15 Sep 86-31 May 87,

Corporate Author:

TEXAS RESEARCH INST INC AUSTIN

Personal Author(s):

Report Date:

1987-08-11

Pagination or Media Count:

56.0

Abstract:

This report describes the results of a successful effort to demonstrate the feasibility of using leaky Lamb waves to detect and delineate flaws in the bond surface of metalrubber laminates, even when adherends remain in intimate contact. It is shown that the leaky Lamb wave method can detect and image a poorly bonded surface when conventional pulse-echo method failed even to detect the flaw. A new technique was implemented for preparing partially bonded surfaces by varying the percentage of adhesive coverage, and results are provided that illustrate the sensitivity of the leaky Lamb wave method in detecting different surfaces prepared by this technique. An analytical model of the leaky Lamb wave phenomenon in homogenous, isotropic metalrubber laminates is described. Numerical results for a metalrubber laminate immersed in water are included.

Subject Categories:

  • Adhesives, Seals and Binders
  • Laminates and Composite Materials
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE