Static and fatigue behavior of pin-loaded metal matrix joints. Final report, May-November 1983

Technical Report · Fri Jun 01 00:00:00 EDT 1984

OSTI ID:6871400

Grimsley, F M

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.

• Research Organization: Air Force Wright Aeronautical Labs., Wright-Patterson AFB, OH (USA)
• OSTI ID: 6871400
• Report Number(s): AD-B-096070/8/XAB; AFWAL-TR-84-3063
• Resource Relation: Other Information: Distribution limitation now removed
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
MATRIX MATERIALS
JOINTS
FATIGUE
BORON
PROGRESS REPORT
SILICON CARBIDES
STATIC LOADS
TITANIUM
CARBIDES
CARBON COMPOUNDS
DOCUMENT TYPES
ELEMENTS
MATERIALS
MECHANICAL PROPERTIES
METALS
SEMIMETALS
SILICON COMPOUNDS
TRANSITION ELEMENTS
360603* - Materials- Properties