Ultrasonic Procedures for the Determination of Bond Strength.
Abstract
An ultrasonic inspection system for the prediction of adhesive bond strength for metal-to-metal applications is of great value to the U.S. Air Force, as well as many other agencies. The prediction of adhesive bond strength, assuming there are no delaminations, inclusions, or such cohesive type problem as curing, etc. is the goal of this study. Ultrasonically evaluating adhesive bonds that have partially delaminated, is easily accomplished using C-scan techniques, but a major problem arises when the defect in the bond is either adhesive or cohesive in nature. This study involved primarily the adhesive aspect of the bond strength, which is related to the surface preparation problem. Test specimens were manufactured so that a deficient surface preparation occurred on either or both substrates in an aluminum-to-aluminum step-lap joint. The specimens with little or no surface preparation provided weak bonds, and the specimens with proper surface preparation, in general, produced strong bonds.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1978
- Accession Number
- ADA053771
Entities
People
- Graham H. Thomas
- Joseph L. Rose
Organizations
- Drexel University