Primary Adhesively Bonded Structure Technology (PABST). General Material Property Data
Abstract
This program investigated state-of-the-art adhesives, adhesive primers, surface treatments, and coatings to determine, through durability testing, a system that could be used to adhesively bond a primary aircraft structure. Test methods were also evaluated. Previous work indicated cyclic- stressed testing in hostile environments and, specifically, high moisture environments reduced the life and durability of a given adhesive system over the same system load to the same level at constant stress. Conclusions include: (a) Stressed durability testing is required to determine if a given surface treatment is durable; (b) Normal industry accepted processing tolerances on surface treatments are too wide to produce consistently durable bonded joints; (c) Handling of surface treated details must be designed to prevent mechanical damage and contamination; (d) Phosphoric acid anodize process was the surface treatment most tolerant to processing variations and inspectable; (e) Adhesive primers from different suppliers demonstrated a large variation in environment resistance and corrosion protection capabilities; (f) The type of carrier used in adhesive films has a large effect on the moisture resistance of the adhesives; and (g) Cyclic stressed testing in a hostile environment is necessary to determine the optimum adhesive durability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1978
- Accession Number
- ADA077891
Entities
People
- E. J. Hughes
- J. L. Rutherford
- P. Stifel
- R. Beger
- R. W. Shannon
Organizations
- Douglas