Durability of continuous fiber-reinforced metal-matrix composites. Final report, September 1983-December 1986

Technical Report · Thu Oct 01 04:00:00 EDT 1987

OSTI ID:6957063

Harmon, D M; Saff, C R; Sun, C T

The objective of this program was to develop the test data and analysis techniques required to insure the structural integrity of fiber-reinforced metal-matrix composites (FRMMC) when applied to airframe structures. Approximately 300 tests of unidirectional boron/6061 aluminum, (B/sub 4/C)/15-3-3-3 titanium, and crossplied boron/6061 aluminum were performed. Testing was concentrated on notched (central hole) specimens to evaluate the notch sensitivity of these materials and to discriminate between the failure modes of aluminum- and titanium-matrix composites. It was found that the relative fiber and matrix stiffnesses and strengths determine primary failure modes in fatigue. Analysis methods were developed based on fiber and matrix properties to predict notched and unnotched static strength, crack initiation, fatigue failure mode, life to failure, and residual strength. One half of the tests (150 specimens) were performed to verify the predicted properties of the aluminum- and titanium-matrix composites.

• Research Organization: McDonnell Aircraft Co., St. Louis, MO (USA)
• OSTI ID: 6957063
• Report Number(s): AD-A-193868/7/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
BORON ALLOYS
COMPOSITE MATERIALS
DATA
DOCUMENT TYPES
ELEMENTS
EXPERIMENTAL DATA
FAILURE MODE ANALYSIS
FATIGUE
FIBERS
INFORMATION
MATERIALS
MATRIX MATERIALS
MECHANICAL PROPERTIES
METALS
NUMERICAL DATA
PROGRESS REPORT
REINFORCED MATERIALS
RELIABILITY
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TITANIUM
TITANIUM ALLOYS
TRANSITION ELEMENTS