Static and Fatigue behavior of Pin-Loaded Metal Matrix Joints
Abstract
Continuously reinforced metal matrix composites (MMC) have been projected to have the potential to save weight in aerospace structures due to their high strength and stiffness. These structures must somehow be joined together to form larger structures. Historically, the most common and most accepted method of joining structures together is through the use of fasteners with varying amounts of load transfer between them. These types of loadings are very complex and are not well understood even in conventional metals. Some work has been done for the graphite/epoxy composites but very little has been done on continuously reinforced MMC. The objective of this study was to assess the ability of current composite analysis procedures to predict the static behavior of joints made from various unidirectional MMC and to investigate the fatigue behavior of these joints when subjected to constant amplitude loading. Specific objectives were to determine experimentally the static behavior of double-lapped shear joint specimens made from three different MMC composites; to analytically predict the static strength of these joints and to experimentally determine whether joints under fatigue loading fail in the same manner as the statistically loaded joints. Three composite materials were chosen for testing: unidirectional B/Al, and SiC/Al and Ti clad unidirectional B4C/Al hybrid. Detailed studies of the materials' behavior were made for both the static and fatigue tests using both destructive and nondestructive evaluation methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1984
- Accession Number
- ADB096070
Entities
People
- F. M. Grimsley
Organizations
- Wright Laboratory